Green vegetable selection criteria for herbicides

Green vegetables are non-polluting, high-quality, delicious, nutritious and healthy vegetables. Although herbicides, one of the pesticides , are much less toxic to humans and animals than pesticides. But we must not lose sight of the impact of herbicides on green vegetable production. The method of how to choose the application of herbicides for the production of green vegetables is as follows: According to the type, it is selected by absorption method: vegetable contact should use contact herbicide as much as possible. Or use a herbicide with poor conductivity in the systemic herbicide.

According to the treatment method: it is divided into stem and leaf treatment herbicide and soil treatment herbicide. After the stem and leaf treatment herbicides are sprayed, there is generally no residual effect in the soil: after the soil treatment herbicide is sprayed. Will produce a residual period in the soil. From a week to a year or more. This residual effect will cause the sorghum vegetables not to germinate. Or dead seedlings after germination. The leaf-leaf vegetables should try not to use the stems and leaves to treat the herbicides, and the root vegetables should not use the soil that will damage the roots to treat the herbicides. From the consideration of residue: after the application of the systemic herbicide. There are more or less residues in the plant. To this end, vegetable sites should try not to use a systemic chemical herbicide, which can be replaced by a biological herbicide. From its toxicity considerations: herbicides are divided into four categories: high toxicity, poisoning, low toxicity and microtoxicity. It is strictly forbidden to use high-toxic poisoning herbicides in vegetable fields, and low-toxic and slightly toxic herbicides can be used. From the choice of dosage form: herbicides include powders, emulsions, liquids, granules, soluble powders, smoke agents, oils, suspensions and tablets. All kinds of herbicides are added with additives. Introduction of the agent. Will increase the toxicity of herbicides. But it also increases the possibility of phytotoxicity. Therefore, vegetable ground should try to avoid the use of emulsifiable concentrates, oils, suspensions, smokers and tablets.

According to the degree of odor and pollution: Protected vegetables and greenhouse vegetables should try to avoid the use of herbicides with strong pungent odor. Some herbicides are polluted and contaminated by containers. Choose leafy vegetables according to the type of vegetables: vegetables including cabbage, cabbage, and green leaves. These vegetables are not recommended to use herbicides. Liliaceae, root vegetables, yam vegetables: amaranth growing short, harvesting frequency, leaf, try not to use herbicides. when necessary. Optional contact-killing micro-toxic herbicide Guoer, sprayed after the harvest of old leeks: garlic, lily, potato, ginger, yam long growing. The edible bulbs and tubers are mainly used, and the garlic is eaten with garlic. The soil can be treated in the early stage of growth or the stems and leaves can be treated early in the post-emergence period. Solanum vegetables: This type of vegetables should not be treated with stem and leaf treatments. Before transplanting, you can use contact-type soil treatment agent, such as er, oxacillin or contact killing. Vegetable Zhuang No. 2, Diltiazem with slight systemic conduction. Melon vegetables: This type of vegetables is strictly prohibited to use acetochlor. It is advisable to use weeding, fruit and oxacillin to carry out soil treatment after sowing. Beans and vegetables: more herbicides for vegetable applications. However, herbicides are still preferred for soil treatment. Aquatic vegetables: try not to use herbicides, if necessary. Can be used with low toxicity. Special vegetables: including asparagus, burdock, lettuce, artichoke, ginger, leeks, malan, chrysanthemum and so on. The fruit can be used for soil treatment before or after transplanting.

Choose grass according to weed species: control grass in broadleaf vegetables, use catching, killing or killing. It can also be treated with Dahuili soil. Sedge: You can use Sharon to carry out soil treatment. Broadleaf: It can be treated with low dose ground of Gore and Etoposide. Grass + broadleaf grass: can be treated with dilamine and weeding. Sedge + broadleaf: stems and leaves can be killed before glyphosate. Grass + sedge + broadleaf grass: available normal amount of evil grass. Or vegetable Zhuang No. 2, Zhuangzhuang No. 1, and garlic grass with low amount of soil treatment. According to the environmental conditions, the vegetables in the protected area are selected: the humidity inside the membrane is large, which is conducive to the growth of vegetables and is also conducive to the propagation of weeds. It is preferred to apply a contact-type soil treatment herbicide at a low dose before or after sowing. Open field vegetables: There are more types of herbicides to choose from. The herbicides described in this article can be used.

Vegetable fields in arid regions: application of soil treatment herbicides in arid regions. The effect cannot be guaranteed. Foliar treatment can be used instead. However, the spraying period of the foliar treatment agent should be kept at a sufficient safety interval from the picking period of the vegetables. Vegetable areas in rainy areas: rainy areas mainly use soil treatment herbicides. And the use of low doses can achieve the purpose of controlling grass, and the use of stem and leaf herbicides is not recommended. Vegetable soil with high organic matter: the herbicide can be treated with soil. Treatment of herbicides with stems and leaves is not recommended. Barren soil vegetable land: Avoid using soil to treat herbicides. However, the foliar treatment agent should be left with a sufficient safety interval before the spraying of the vegetables.

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