Improper use of herbicides
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"A fire" is also known as gram-free, paraquat, and is a quick-acting killing type of quaternary ammonium salt herbicide. The active ingredient has a strong destructive effect on the chloroplast membrane, which makes the photosynthesis and chlorophyll synthesis stop quickly. The leaves begin to suffer discoloration 2 to 3 hours after the drug is applied. Paraquat has strong green tissue for both monocotyledonous and dicotyledonous plants. Destructive effect is a fast-killing herbicide with contact and certain systemic action. Can be quickly absorbed by plant green tissue, causing it to die.
Gram-free is mainly used to control all kinds of annual weeds, has a strong killing effect on perennial weeds, and has no effect on the lignified brown stems and trunks. It is suitable for weed control in orchards, mulberry gardens, rubber gardens and forest belts. It can also be used to prevent weeds in cultivated land, field ridges and roadsides. For wide crops such as corn, sugar cane, soybeans and nurseries, directional spray is generally used to prevent and remove impurities. grass. The peasant used it in the leeks, although it also took certain protective measures, but the leeks belonged to the dwarf plants, which were basically consistent with the weeds. Many weeds were mixed in the leeks, so they were used in the leeks. "A fire" is very likely to happen and cause losses.
In the summer, the herbicides provide the farmers with the convenience of weeding, but also bring certain risks. If they are improperly selected or used improperly, they will cause irreparable damage. It is hoped that when farmers choose herbicides, they should choose scientifically according to different crops and different weeds. At the same time, it is also recommended that the agricultural technology department and agricultural resource dealers increase the technical training for farmers and the promotion of herbicide application technology, and recommend agricultural products to farmers correctly and reasonably.
Qingdao Agricultural University Zhang Lining
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