(a) Cultivation season. Due to the longer growth period of the Sagittaria, transplants are used throughout the country to increase the multiple cropping index. General spring nursery,
Planted in stages, the Yangtze River basin is mostly nursed in mid-April to May, and planted in Daejeon in mid-June to early-July. It is called early water sagittaria, which can be harvested in autumn; it can also be planted in early indica rice, white rice, mat grass, etc. After the crop is harvested, it is planted in late July-August and is called the late water Sagittarius, harvested in winter and spring.
(B) nursery methods.
1 Select a bud. In order to cultivate strong seedlings, fine bulbs must be selected. It is generally advisable to select bulbs with the characteristics of the varieties planted, moderate in size, and fully mature, and the tip buds should have a thickness of 0.6-1 cm.
2 Putian preparation. Should choose fertile soil, irrigation and irrigation, water and fertilizer cultivation of the field seedlings, such as early water Sagittius seedlings, cultivated land every 666.7
M2 applied 3000-4000kg of organic fertilizer, deep plowing 20-25cm, made into a long seedling pool 1.3-1.6m wide, and the aisle width 30cm.
3 inserts. Generally, in the late April to early May, when the local temperature has risen above 15°C, the terminal buds will be inserted at 9-12cm each along the line and spacing. The specific planting density depends on the seedling age and the soil is thin. The soil is more fat and the seedling age is thin. The soil is thinner and the seedling age is shorter. The seeding depth generally requires the top bud to rise from the bottom to the third quarter. Inserting 1.5-2cm into the soil is appropriate. When inserting, keep 2-3cm of shallow water in the field, and gently put in the field for 7-10 days after insertion to keep the soil moist for rooting. When the coleoptile is opened and the first transitional leaf is withdrawn, a thin layer of shallow water is poured.
If Sagittaria buds are of different sizes, the size of the top buds should be inserted separately to facilitate the management of the fields.
4 Sakata management. During the sprout growth of the seedlings, keep 2-3cm of shallow water to facilitate the improvement of soil temperature and promote hairy roots. In case of night frost, deep-water antifreeze at night and shallow water the next day. After 7-10 days of plugging, hairy roots begin to grow. Mung-fertilizer can be chased once. 666.7 m2 of 20% of decomposed manure water is applied around 1000 kg. Seedlings are promoted early. About 10 days after planting, weeding begins and attention is paid. And control locusts.
When the seedlings grow to 25-30cm high and there are 3-4 leaves, they can plant seedlings; if the planting field is not ready yet, they can stay in paddy fields and continue to grow until they are planted as Sagittarius laterwings. The period can be extended to less than 90 days. Into the summer hot season, the temperature reached 25 °C
Above, Putian irrigation should gradually deepen to 6-10cm. In terms of management, we must prevent overgrowth and prevent malnutrition. We must adjust water and fertilizer, apply appropriate phosphorus and potassium fertilizers, and regularly call old leaves outside the seedlings, leaving only the central new leaves 3-4. sheet.
(c) Field planting
1, soil preparation fertilization. Choose soil with a soil containing more than 1.5% organic matter and a thick layer of low-lying paddy field to plow 20cm deep. Apply 66kg m2 fertilizer or manure every 666.7 m2. Apply 15-20kg of urea and 30-40kg of superphosphate as base fertilizer. Fuping, poured into shallow water, can be planted.
The basal fertilizer can not only directly supply part of the mineral nutrients needed for the whole growth period of the plant, but also can improve the physical properties of the soil and facilitate the rapid expansion of the bulbs. Therefore, the application of basal fertilization is an important measure to seize the high yield of Sagittarius.
2, timely and reasonable close planting. The time for the planting of Sagittaria varies depending on the climatic conditions and the gargle arrangements. Among them, early matrons planted should not be too early, generally require the seedling age to reach more than 45 days, the seedling height reached 25-30cm, with 4-5 green leaves, otherwise the seedlings are too small, and the planting of the seedlings after the planting is slow and can not reach the goal of precociousness. The output is not high. The late-maturing Sagittarius requires that it be planted as early as possible. After the crop has been harvested, it must be ploughed and planted. Since the temperature is lowered after the fall and the growth period is limited, the later the planting, the lower the yield. The Yangtze River basin should generally be planted at the latest by the end of August, otherwise the growing period of the field is too short and the output will be greatly reduced. The Sagittaria requires shallow water for planting and reasonable planting. The planting density differs depending on the cultivation season and the soil is thin. Premature cultivation has a long growth period and a large degree of development. The average row spacing is 40-45cm. The late maturing cultivation has a short growing period, and the development degree is small. The average row spacing is about 35cm; the specific planting density varies depending on soil fat and species. For example, if the soil fertile varieties are tall and large, they should be appropriately thin; The seedlings were planted before planting, and the peripheral leaves were removed and the center young leaves and peripheral petioles were kept 25-30 cm to reduce the water transpiration and to prevent plants from shaking in the event of wind and rain. The planting depth was generally 9-12 cm, so that the seedlings were planted in soil. Planted trees that are too deep to grow are not easy to grow; they are too shallow to be shaken or floated by the wind; they are not suitable. After planting the whole field, a small amount of ready-to-prepare seedlings were added to the field side to prepare for shortages. Keep 2-3cm shallow water when planting to facilitate living trees.
(d) Daejeon Management
1, water management. In shallow water, ground irrigation and drought prevention are the main factors. However, under conditions of high temperature and heavy rain, appropriate drainage of water should be taken into consideration to prevent leggy growth. In the case of high temperature and drought, it is necessary to pay attention to the deep irrigation of cold water, so as to prevent illness. In the early period of plant growth, 3-6cm of shallow water is maintained. During the rainy season, the plants are prone to overgrowth. A field can be placed in the upper and middle of July to control the growth of the aboveground parts and turn the long term into robustness and increase the resistance of the plants. The extent of the plots is determined by seedling conditions. For example, if the leaves are green and the leaves are thin, they must be rescheduled; otherwise, they are light. It is generally put to the ground and cracked.
Then water. Later into the hot season of drought, the water layer can be properly deepened. In July-August, when the temperature reaches 35°C or above, cold water is introduced late at night or early in the morning to deepen the water layer to 12-20cm. Proper deep irrigation and constant exchange of cold water can ensure that the Sagittaria plants thrive and grow on moisture. Demand can also improve the microclimate conditions in the field, reduce the adverse effects of high temperatures, play a role in preventing heatstroke, ensure the healthy growth of plants, and suppress the occurrence and spread of diseases. After mid-August, the climate turns cooler and it is advisable to restore shallow water, which is generally 8-10cm. By September-October, a large number of plants will be staged, and they will be 3-5cm shallow. Finally, the soil will remain moist.
2, a reasonable fertilization. Fertilizer application during the entire growth period should follow the principles of promotion, control, and promotion, and must pay attention to the combined use of nitrogen, phosphorus, and potassium. According to the experiment, late-maturing cultivation of Sagittaria, and the application of 50 kg of P fertilizer to the plots without P fertilizer increased the yield by 15%, and the bulbs increased significantly. Sagitta has a good response to potash. After the application of potash fertilizer, not only the yield increased significantly, but also the quality was improved. The bulbs were large, the skin was blue with purple, there were no rust spots, no bitterness, and it was resistant to storage. It is advisable to apply 13 kg of potassium chloride per 666.7 m2 in general fertility soil. Potassium fertilizer should be applied early and should be combined with nitrogen and phosphorus. The early water sagittaria usually begins to grow fertilizer 10-14 days after planting, that is, after growing, to promote plant growth. Every 666.7 m2, about 20% of the decomposed manure water 1500kg or ammonium bicarbonate 30kg plus urea 10kg is applied uniformly. After planting, the fields were evenly mixed with the soil. To cool the weather,
When the plant extracts lychee, a heavier fertilizer should be applied one after another to promote the growth of the lychee. At this point the new leaf is still growing, the strongest assimilating effect, the plant sucking large amount of fertilizer, generally every 666.7 m2 applied into the decomposed human excrement 2500kg or urea 30kg, the other application of plant ash 100kg, good effect on bulb expansion. Because of the short growth period, Sagittaria laterdonii usually only performs topdressing once, and it takes more than 25-30 days after planting. The number is similar to that of early water Sagittaria.
3. Weeding and removal of old leaves in Putian. After the Sagittaria has been planted and resuscitated, the first weeding work in the field will be carried out. During the entire stem and leaf growth period, every 15-
After 30 days of sowing in the field, till the sowing of lychees, it usually takes 2-4 times. To improve lighting and ventilation conditions in the field, maintain a certain leaf area, improve photosynthetic efficiency, and reduce the risk of pests and diseases, measures to remove old leaves have been implemented in production. These measures are called loquat leaves, that is, the old leaves of the plant's outer ring and the petioles. , Plug into the mud next to the strain, which will not only increase the soil fertility, but also conducive to ventilation and light transmission, and can prevent the plant more leaves, in the hot season, the lychee, bear the bulb. In general, the outer leaves of each yellow plant hit the old leaves, leaving 4-5 new leaves, every 15-20
Once a day, a total of 2-4 times of loquat leaves until the weather turns cold and the temperature drops below 25°C. The temperature difference between day and night will increase, which is conducive to the accumulation of plant nutrients and the promotion of branching. The protection of the leaves and roots should be taken care of.
(five) pest control
1, Sagittarius disease. Chinese Sagittaria has the following three main diseases, which often occur simultaneously or sequentially.
(1) Sagittarius smut. Also known as bubble disease and blister disease, it is the main disease of Sagittaria. It is widespread and some fields are serious. The main damage to the leaves and petioles can also harm the bulbs. Causes a drop in production and quality. The disease is prone to occur and develop under conditions of high temperature and humidity during the June-July months in the Yangtze River basin. Began to appear in the leaves on the round spots of chlorosis, and later gradually developed as yellow-green irregular round blister, blister part of the rough surface, the internal spongy, often yellow-white slurry outflow, late lesions change Gray-brown, the epidermis is brown and broken, many small black powder particles are scattered, that is, the chlamydospores of the bacteria, and the leaves are yellow; the lesions on the petioles are initially whitish, and develop into oval knob-like protrusions. There are several longitudinal grooves, which are yellowish in the later stages. After the epidermis ruptures, the spores of the black powder are scattered. Severe breaks often occur. After the flowers are damaged, the ovary becomes dark brown and the bulbs suffer. The base of the spores is completely replaced by the black crust spore group. The bulbs become smaller and uneatable. The main control method for smut: implement a reasonable rotation, the incidence of the field, need to be separated by more than 2 years before replanting Sagittaria. Use disease-free bulbs as a seed. Remove yellow leaves,
The diseased leaves were concentrated and burned. Pay attention to the use of the three elements of nitrogen, phosphorus, and potassium to prevent the application of more nitrogen. As early as the early onset of the disease, alternating sprays of 20% triadimefon (triteng) WP 1000x and 25% carbendazim 500x, and copper sulphate:lime 1:1.5+water 250x Bordeaux mixture were used. Spray once every 10 days. Rainy weather, make up after the rain, until the weather turns cold.
(2) Asthma streak disease. The main harm to the leaves, but also harm the petiole. The lesions on the leaves are gray-brown and round, oval, polygonal, or irregular.
Slightly green, with a similar ring of gray mold layer, diameter 1.5-15mm, surrounded by a clear yellow-green or dark green halo; lesions on the petiole, brown,
Short line. Control methods: Early removal of weeds in the fields and Alimentariaceae. Collect and destroy the diseased plant tissue left in the field. Pay attention to nitrogen, phosphorus,
Potassium fertilizer with the application, to prevent more nitrogen fertilizer. Use copper sulphate: lime 1:1 water 200-250 times Bordeaux mixture and 50% wettable mancozeb 500 times, or 70% thiophanate-methyl 800-1000 times alternating spray control. The spraying time is the same as the control of smut.
(3) Sagittaria brown spot. Also known as spot disease, which mainly damages the leaves, dense dark brown spots appear on the leaves, and small spots often have white dots that are the fruiting bodies of the bacteria. The disease is relatively common, but the hazard is lighter than the above two diseases. The disease is also caused by a fungus, Sargassum spp. Its route of transmission, onset conditions, and prevention and treatment methods are basically the same as those of Aegilops zebrafish, and can be coordinated as a whole.
2. Cigong Pest (1) Lotus root tube. The Yangtze River valley began moving from late April to early May to aquatic animals such as Sagittaria, where it was mainly harmed by young leaves, concentrated on sucking juice, resulting in new leaf curling and poor plant growth. In winter, the quail eggs winter over peaches and other stone fruit trees. After 4-5 generations of hatching in the spring, winged otters migrate to Sagittaria and lotus roots. They can reproduce about 25 generations of Sagittarius and other aquatic vegetables. 10 In the middle of the month, it moved back to the winter fruiting tree, the mating fruit, and mated and spawned. The temperature is between 22-30°C and the relative humidity is between 80%-85%, which is most suitable for the breeding of this mite.
Control methods: At the beginning of the outbreak, use 40% of Dimethoate Emulsion 1000 times and 2.5% of deltamethrin Emulsion (disease) 2000 times, or 20% of fenvalerate (exterminate D) Emulsion 3000-4000 Alternating liquid use, spray control.
(2) Sagittarius bore insects, also known as Sagittarius. The Yangtze River valley usually takes place from July to September. Adults lay eggs on the leaves or petioles. After incubating the larvae, they drill into the petiole and feed on the leaves to break off the withered leaves. Control methods: Clearance of Sagittaria stubble before planting, eliminate overwintering larvae. In the early stage of larvae hatching, spray 80% of dichlorvos emulsion 1000 times or spray 40% Dimethoate 1000 times. If the larvae have drilled into the petiole for food, causing the phenomenon of hanging leaves, the diseased leaves should be promptly chopped into the mud together with the petioles.
Contact Tel: (0) 13852501971 13056373085
0514-8180728 0514-8280385
Contact person: Mr. Xia Sun
Planted in stages, the Yangtze River basin is mostly nursed in mid-April to May, and planted in Daejeon in mid-June to early-July. It is called early water sagittaria, which can be harvested in autumn; it can also be planted in early indica rice, white rice, mat grass, etc. After the crop is harvested, it is planted in late July-August and is called the late water Sagittarius, harvested in winter and spring.
(B) nursery methods.
1 Select a bud. In order to cultivate strong seedlings, fine bulbs must be selected. It is generally advisable to select bulbs with the characteristics of the varieties planted, moderate in size, and fully mature, and the tip buds should have a thickness of 0.6-1 cm.
2 Putian preparation. Should choose fertile soil, irrigation and irrigation, water and fertilizer cultivation of the field seedlings, such as early water Sagittius seedlings, cultivated land every 666.7
M2 applied 3000-4000kg of organic fertilizer, deep plowing 20-25cm, made into a long seedling pool 1.3-1.6m wide, and the aisle width 30cm.
3 inserts. Generally, in the late April to early May, when the local temperature has risen above 15°C, the terminal buds will be inserted at 9-12cm each along the line and spacing. The specific planting density depends on the seedling age and the soil is thin. The soil is more fat and the seedling age is thin. The soil is thinner and the seedling age is shorter. The seeding depth generally requires the top bud to rise from the bottom to the third quarter. Inserting 1.5-2cm into the soil is appropriate. When inserting, keep 2-3cm of shallow water in the field, and gently put in the field for 7-10 days after insertion to keep the soil moist for rooting. When the coleoptile is opened and the first transitional leaf is withdrawn, a thin layer of shallow water is poured.
If Sagittaria buds are of different sizes, the size of the top buds should be inserted separately to facilitate the management of the fields.
4 Sakata management. During the sprout growth of the seedlings, keep 2-3cm of shallow water to facilitate the improvement of soil temperature and promote hairy roots. In case of night frost, deep-water antifreeze at night and shallow water the next day. After 7-10 days of plugging, hairy roots begin to grow. Mung-fertilizer can be chased once. 666.7 m2 of 20% of decomposed manure water is applied around 1000 kg. Seedlings are promoted early. About 10 days after planting, weeding begins and attention is paid. And control locusts.
When the seedlings grow to 25-30cm high and there are 3-4 leaves, they can plant seedlings; if the planting field is not ready yet, they can stay in paddy fields and continue to grow until they are planted as Sagittarius laterwings. The period can be extended to less than 90 days. Into the summer hot season, the temperature reached 25 °C
Above, Putian irrigation should gradually deepen to 6-10cm. In terms of management, we must prevent overgrowth and prevent malnutrition. We must adjust water and fertilizer, apply appropriate phosphorus and potassium fertilizers, and regularly call old leaves outside the seedlings, leaving only the central new leaves 3-4. sheet.
(c) Field planting
1, soil preparation fertilization. Choose soil with a soil containing more than 1.5% organic matter and a thick layer of low-lying paddy field to plow 20cm deep. Apply 66kg m2 fertilizer or manure every 666.7 m2. Apply 15-20kg of urea and 30-40kg of superphosphate as base fertilizer. Fuping, poured into shallow water, can be planted.
The basal fertilizer can not only directly supply part of the mineral nutrients needed for the whole growth period of the plant, but also can improve the physical properties of the soil and facilitate the rapid expansion of the bulbs. Therefore, the application of basal fertilization is an important measure to seize the high yield of Sagittarius.
2, timely and reasonable close planting. The time for the planting of Sagittaria varies depending on the climatic conditions and the gargle arrangements. Among them, early matrons planted should not be too early, generally require the seedling age to reach more than 45 days, the seedling height reached 25-30cm, with 4-5 green leaves, otherwise the seedlings are too small, and the planting of the seedlings after the planting is slow and can not reach the goal of precociousness. The output is not high. The late-maturing Sagittarius requires that it be planted as early as possible. After the crop has been harvested, it must be ploughed and planted. Since the temperature is lowered after the fall and the growth period is limited, the later the planting, the lower the yield. The Yangtze River basin should generally be planted at the latest by the end of August, otherwise the growing period of the field is too short and the output will be greatly reduced. The Sagittaria requires shallow water for planting and reasonable planting. The planting density differs depending on the cultivation season and the soil is thin. Premature cultivation has a long growth period and a large degree of development. The average row spacing is 40-45cm. The late maturing cultivation has a short growing period, and the development degree is small. The average row spacing is about 35cm; the specific planting density varies depending on soil fat and species. For example, if the soil fertile varieties are tall and large, they should be appropriately thin; The seedlings were planted before planting, and the peripheral leaves were removed and the center young leaves and peripheral petioles were kept 25-30 cm to reduce the water transpiration and to prevent plants from shaking in the event of wind and rain. The planting depth was generally 9-12 cm, so that the seedlings were planted in soil. Planted trees that are too deep to grow are not easy to grow; they are too shallow to be shaken or floated by the wind; they are not suitable. After planting the whole field, a small amount of ready-to-prepare seedlings were added to the field side to prepare for shortages. Keep 2-3cm shallow water when planting to facilitate living trees.
(d) Daejeon Management
1, water management. In shallow water, ground irrigation and drought prevention are the main factors. However, under conditions of high temperature and heavy rain, appropriate drainage of water should be taken into consideration to prevent leggy growth. In the case of high temperature and drought, it is necessary to pay attention to the deep irrigation of cold water, so as to prevent illness. In the early period of plant growth, 3-6cm of shallow water is maintained. During the rainy season, the plants are prone to overgrowth. A field can be placed in the upper and middle of July to control the growth of the aboveground parts and turn the long term into robustness and increase the resistance of the plants. The extent of the plots is determined by seedling conditions. For example, if the leaves are green and the leaves are thin, they must be rescheduled; otherwise, they are light. It is generally put to the ground and cracked.
Then water. Later into the hot season of drought, the water layer can be properly deepened. In July-August, when the temperature reaches 35°C or above, cold water is introduced late at night or early in the morning to deepen the water layer to 12-20cm. Proper deep irrigation and constant exchange of cold water can ensure that the Sagittaria plants thrive and grow on moisture. Demand can also improve the microclimate conditions in the field, reduce the adverse effects of high temperatures, play a role in preventing heatstroke, ensure the healthy growth of plants, and suppress the occurrence and spread of diseases. After mid-August, the climate turns cooler and it is advisable to restore shallow water, which is generally 8-10cm. By September-October, a large number of plants will be staged, and they will be 3-5cm shallow. Finally, the soil will remain moist.
2, a reasonable fertilization. Fertilizer application during the entire growth period should follow the principles of promotion, control, and promotion, and must pay attention to the combined use of nitrogen, phosphorus, and potassium. According to the experiment, late-maturing cultivation of Sagittaria, and the application of 50 kg of P fertilizer to the plots without P fertilizer increased the yield by 15%, and the bulbs increased significantly. Sagitta has a good response to potash. After the application of potash fertilizer, not only the yield increased significantly, but also the quality was improved. The bulbs were large, the skin was blue with purple, there were no rust spots, no bitterness, and it was resistant to storage. It is advisable to apply 13 kg of potassium chloride per 666.7 m2 in general fertility soil. Potassium fertilizer should be applied early and should be combined with nitrogen and phosphorus. The early water sagittaria usually begins to grow fertilizer 10-14 days after planting, that is, after growing, to promote plant growth. Every 666.7 m2, about 20% of the decomposed manure water 1500kg or ammonium bicarbonate 30kg plus urea 10kg is applied uniformly. After planting, the fields were evenly mixed with the soil. To cool the weather,
When the plant extracts lychee, a heavier fertilizer should be applied one after another to promote the growth of the lychee. At this point the new leaf is still growing, the strongest assimilating effect, the plant sucking large amount of fertilizer, generally every 666.7 m2 applied into the decomposed human excrement 2500kg or urea 30kg, the other application of plant ash 100kg, good effect on bulb expansion. Because of the short growth period, Sagittaria laterdonii usually only performs topdressing once, and it takes more than 25-30 days after planting. The number is similar to that of early water Sagittaria.
3. Weeding and removal of old leaves in Putian. After the Sagittaria has been planted and resuscitated, the first weeding work in the field will be carried out. During the entire stem and leaf growth period, every 15-
After 30 days of sowing in the field, till the sowing of lychees, it usually takes 2-4 times. To improve lighting and ventilation conditions in the field, maintain a certain leaf area, improve photosynthetic efficiency, and reduce the risk of pests and diseases, measures to remove old leaves have been implemented in production. These measures are called loquat leaves, that is, the old leaves of the plant's outer ring and the petioles. , Plug into the mud next to the strain, which will not only increase the soil fertility, but also conducive to ventilation and light transmission, and can prevent the plant more leaves, in the hot season, the lychee, bear the bulb. In general, the outer leaves of each yellow plant hit the old leaves, leaving 4-5 new leaves, every 15-20
Once a day, a total of 2-4 times of loquat leaves until the weather turns cold and the temperature drops below 25°C. The temperature difference between day and night will increase, which is conducive to the accumulation of plant nutrients and the promotion of branching. The protection of the leaves and roots should be taken care of.
(five) pest control
1, Sagittarius disease. Chinese Sagittaria has the following three main diseases, which often occur simultaneously or sequentially.
(1) Sagittarius smut. Also known as bubble disease and blister disease, it is the main disease of Sagittaria. It is widespread and some fields are serious. The main damage to the leaves and petioles can also harm the bulbs. Causes a drop in production and quality. The disease is prone to occur and develop under conditions of high temperature and humidity during the June-July months in the Yangtze River basin. Began to appear in the leaves on the round spots of chlorosis, and later gradually developed as yellow-green irregular round blister, blister part of the rough surface, the internal spongy, often yellow-white slurry outflow, late lesions change Gray-brown, the epidermis is brown and broken, many small black powder particles are scattered, that is, the chlamydospores of the bacteria, and the leaves are yellow; the lesions on the petioles are initially whitish, and develop into oval knob-like protrusions. There are several longitudinal grooves, which are yellowish in the later stages. After the epidermis ruptures, the spores of the black powder are scattered. Severe breaks often occur. After the flowers are damaged, the ovary becomes dark brown and the bulbs suffer. The base of the spores is completely replaced by the black crust spore group. The bulbs become smaller and uneatable. The main control method for smut: implement a reasonable rotation, the incidence of the field, need to be separated by more than 2 years before replanting Sagittaria. Use disease-free bulbs as a seed. Remove yellow leaves,
The diseased leaves were concentrated and burned. Pay attention to the use of the three elements of nitrogen, phosphorus, and potassium to prevent the application of more nitrogen. As early as the early onset of the disease, alternating sprays of 20% triadimefon (triteng) WP 1000x and 25% carbendazim 500x, and copper sulphate:lime 1:1.5+water 250x Bordeaux mixture were used. Spray once every 10 days. Rainy weather, make up after the rain, until the weather turns cold.
(2) Asthma streak disease. The main harm to the leaves, but also harm the petiole. The lesions on the leaves are gray-brown and round, oval, polygonal, or irregular.
Slightly green, with a similar ring of gray mold layer, diameter 1.5-15mm, surrounded by a clear yellow-green or dark green halo; lesions on the petiole, brown,
Short line. Control methods: Early removal of weeds in the fields and Alimentariaceae. Collect and destroy the diseased plant tissue left in the field. Pay attention to nitrogen, phosphorus,
Potassium fertilizer with the application, to prevent more nitrogen fertilizer. Use copper sulphate: lime 1:1 water 200-250 times Bordeaux mixture and 50% wettable mancozeb 500 times, or 70% thiophanate-methyl 800-1000 times alternating spray control. The spraying time is the same as the control of smut.
(3) Sagittaria brown spot. Also known as spot disease, which mainly damages the leaves, dense dark brown spots appear on the leaves, and small spots often have white dots that are the fruiting bodies of the bacteria. The disease is relatively common, but the hazard is lighter than the above two diseases. The disease is also caused by a fungus, Sargassum spp. Its route of transmission, onset conditions, and prevention and treatment methods are basically the same as those of Aegilops zebrafish, and can be coordinated as a whole.
2. Cigong Pest (1) Lotus root tube. The Yangtze River valley began moving from late April to early May to aquatic animals such as Sagittaria, where it was mainly harmed by young leaves, concentrated on sucking juice, resulting in new leaf curling and poor plant growth. In winter, the quail eggs winter over peaches and other stone fruit trees. After 4-5 generations of hatching in the spring, winged otters migrate to Sagittaria and lotus roots. They can reproduce about 25 generations of Sagittarius and other aquatic vegetables. 10 In the middle of the month, it moved back to the winter fruiting tree, the mating fruit, and mated and spawned. The temperature is between 22-30°C and the relative humidity is between 80%-85%, which is most suitable for the breeding of this mite.
Control methods: At the beginning of the outbreak, use 40% of Dimethoate Emulsion 1000 times and 2.5% of deltamethrin Emulsion (disease) 2000 times, or 20% of fenvalerate (exterminate D) Emulsion 3000-4000 Alternating liquid use, spray control.
(2) Sagittarius bore insects, also known as Sagittarius. The Yangtze River valley usually takes place from July to September. Adults lay eggs on the leaves or petioles. After incubating the larvae, they drill into the petiole and feed on the leaves to break off the withered leaves. Control methods: Clearance of Sagittaria stubble before planting, eliminate overwintering larvae. In the early stage of larvae hatching, spray 80% of dichlorvos emulsion 1000 times or spray 40% Dimethoate 1000 times. If the larvae have drilled into the petiole for food, causing the phenomenon of hanging leaves, the diseased leaves should be promptly chopped into the mud together with the petioles.
Contact Tel: (0) 13852501971 13056373085
0514-8180728 0514-8280385
Contact person: Mr. Xia Sun
Various products of Chrysanthemum Tea, providing product images and basic parameters with each Chrysanthemum Tea and High Quality Chrysanthemum Tea;Chrysanthemum tea, is a flower made of chrysanthemum tea. Chrysanthemum tea after picking flowers, dried, sun drying, baking and other processes made. Chrysanthemum bitter, slightly cold, wind scattered heat, Liver eyesight and detoxification anti-inflammatory effect. We are a professional Chinese supplier of Chrysanthemum Tea, and look forward to your cooperation!
Chrysanthemum Tea
Chrysanthemum Tea,Relieving Summer Heat Tea,Mingmu Chrysanthemum Tea,Anti Radiation Chrysanthemum Tea
Ningxia ZhongYuanDa Agel Ecommerce Ltd. , https://www.freshwolfberry.com