First, heart-broken veins become brown at the beginning of heart-warming symptoms. Afterwards, the leaf-edge cells gradually die and appear dark brown. The pre-harvest period is less frequent, and it usually occurs in 11-12 leaves. The main cause of the disease is caused by calcium deficiency. The celery cultivated in the summer is prone to heartburn. Control methods: mainly from the management, so that the temperature and humidity are appropriate, lime is applied to the acidic soil, and the pH of the soil is adjusted to neutrality; 0.5% calcium nitrate can be sprayed in the early stage of the disease. Aqueous solution. Second, the hollow symptoms extend upward from the base of the petiole, and a white floc-like corked tissue appears in the hollow part. The cause of morbidity is a kind of physiological aging phenomenon, which mostly occurs on sandy loam soil and occurs mostly in the middle and late stages of plant growth. In addition, when the soil is dry, the celery is also susceptible to hollowness due to freezing. For prevention and control methods, non-sandless soil should be selected, sufficient organic fertilizer should be applied, timely dressing, and light leaf color should be found. When defertilizing, spray 0.1% urea solution 2-3 times. Third, the petal stalk cracking symptoms mainly manifested that the stem base was split together with the petiole. The first cause of the disease is caused by boron deficiency; the second is due to the growth retardation caused by low temperature and drought conditions; in addition, the sudden high temperature and humidity cause the plants to absorb too much water, causing the tissue to fill water quickly and also cause cracking. Control methods: First, apply sufficient decomposed organic fertilizer, apply 1 kg of borax per 667 m2, and fully mix with organic fertilizer; second, spray 0.1% of a 0.3% borax solution. Pay attention to uniform watering in management.
There are 6 commonly used injection methods we used : transdermal, subcutaneous, muscle, bottom of muscle, vein, artery, intrathecal . Compatible with these injection methods and amounts, you will find an assortment of different disposable syringes of varying sizes. The syringes with Luer-Lock connectors are especially well-suited for infusions and other procedures, where a firm grip between Syringe and needle is necessary.
Safety Auto Destruct Syringe can avoid unnecessary reuse.
Like Insulin syringe , Tubercle bacillus syringe is special .
Syringe
Medical Disposable Syringe,Single Use Syringe,Infusion Set With Regulator,Auto Destruct Syringe
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