Do not ignore cotton pesticide poisoning

Do not ignore cotton pesticide poisoning

In recent years, the author's survey in rural areas found that the occurrence of chemical injury to cotton using chemical pesticides occurred in many cases. Some occurred in seedbeds and some occurred in Daejeon, which seriously affected the growth of cotton. The affected farmers were regretful and miserable. They should be miserable. Pay attention.

Acetochlor phytotoxicity During cotton breeding, cotton seedlings are treated with acetochlor for weeding before seeding. They are prone to phytotoxicity, especially in the event of continuous rainy weather and high temperature and humidity in the shed, which is beneficial to acetochlor. Decomposition, so that the lower concentration of cotton buds absorbed by the coleoptile, the occurrence of heavy injury, and may even make the cotton seedlings in the seedbed all die. The symptoms are that the entire young stem's epidermis is yellow-brown and some of the cotyledon's pedicel appear yellow-brown. When the injury is light, the internal vascular bundle is green, and the vascular damage gradually recovers. When the injury is heavy, it invades the vascular bundle. Cotton sprouts wither. Therefore, it is best not to use acetochlor when growing cotton seedlings. If acetochlor has been used, it should be cooled in time after the cotton seedlings are unearthed, and the bed soil should be whitened. After the occurrence of injury, suitable insulation on the basis of the drying bed promotes the growth of true leaves and improves the resistance of cotton seedlings. During the growth period after the cotton seedlings are transplanted, in some places, acetochlor and weeding can be used to weed the plants, and the cotton leaves appear scorch. This is because acetochlor can inhibit plant cell division; if the damage is light, If you do not die within a few days, you will not have to spray acetochlor onto the cotton leaves by only strengthening the management of fertilizers and water to promote plant growth. Therefore, it must not be used to seal the soil in cotton fields.

When 2.4-DT is used in reed fields and other farmland, large-scale cotton damage often occurs due to the drift. The main symptoms of the damaged cotton were the upper young leaves becoming chicken-claw-shaped, the leaf and temporal lobe shrinking, the leaf color turning green, the temporal lobe open, and the cotton buds turning yellow off, and there were 7 to 8 leaves with severe symptoms. There are 3 to 4 leaves, and lighter ones have 1 to 2 leaves. 2.4-D-butyric esters have strong internal absorption conductivity. Once the young leaves and axillary buds of cotton and other dicotyledonous plants, once caused a phytotoxicity Irreversible. Generally in the downwind direction of 2,500 meters, the cotton can suffer phytotoxicity to varying degrees. Also note that the device for dispensing and spraying 2.4-D-Butyl Ester must be used exclusively and cannot be touched or misted onto the leaves of cotton plants.

Misfiring of dimethyl chlorinated chlorine or spraying of dimethyl chlorinated tetrachloromethane solution may cause phytotoxicity if it is not thoroughly cleaned and sprayed on cotton fields. The symptom is that the cotton leaves turn white and cannot be used for photosynthesis. If no effective measures are taken in time, the entire damaged cotton field will be in danger of being scrapped. In this case, the affected cotton can be detoxified by spraying sodium humate solution. The granular 50% sodium humate was first sprayed with a small amount of water, and then water was added into a 3000 times solution to spray.

In addition, if diuron is used after two true leaves of cotton, it will make its pest damage rate more than 90%; Praxacum will cause the appearance of faded, chlorosis, and withering of the tender leaves of cotton; often used in production. If the 2.4-D sprayer is not washed and used for spraying in the cotton field, it will immediately show phytotoxicity, and the leaves will appear smaller, narrower, twisted and distorted vein stalks, shrinkage, and deformity, often with chicken claws.

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Below image as a reference:

waist heating pad

Waist Heating Pad

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