Rootworm is one of the main pests that harm cabbage. It eats the epidermis of the roots of Chinese cabbage and causes the pathogenic bacteria in the soil to come in, causing the Chinese cabbage to rot and rot. Failure to prevent and treat in time can cause damage to all fields and serious damage to vegetable farmers. The main methods of preventing and controlling Chinese cabbage root pods are:
1, soil treatment. Prior to Chinese cabbage planting, 2.5-3.5 kg of phoxim granules per mu can be used. After mixing with chemical fertilizers, they can be applied to the soil to kill the eggs and larvae of the flies.
2, the ground spray. When the Chinese cabbage grows to 2 to 3 true leaves, or 2.5% per acre with 1.5 kg of trichlorfon powder, dust the field ground to prevent the seed fly from entering the field to lay eggs.
3, vegetable root application. When cabbage grows to 6-8 leaves, it can be mixed with grass ash, lime powder and 2.5% trichlorfon powder in a ratio of 2:1:1. It is applied around the vegetable root to prevent egg fly breeding and killing. Pre-larvae.
4, pharmacy irrigation root. When it is found that the cabbage in the field is damaged by roots, it is necessary to immediately irrigate the roots with 600-800 times of 90% crystal trichlorfon.
1, soil treatment. Prior to Chinese cabbage planting, 2.5-3.5 kg of phoxim granules per mu can be used. After mixing with chemical fertilizers, they can be applied to the soil to kill the eggs and larvae of the flies.
2, the ground spray. When the Chinese cabbage grows to 2 to 3 true leaves, or 2.5% per acre with 1.5 kg of trichlorfon powder, dust the field ground to prevent the seed fly from entering the field to lay eggs.
3, vegetable root application. When cabbage grows to 6-8 leaves, it can be mixed with grass ash, lime powder and 2.5% trichlorfon powder in a ratio of 2:1:1. It is applied around the vegetable root to prevent egg fly breeding and killing. Pre-larvae.
4, pharmacy irrigation root. When it is found that the cabbage in the field is damaged by roots, it is necessary to immediately irrigate the roots with 600-800 times of 90% crystal trichlorfon.
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