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Mastering the technical operating points of herbicide use
Nov 12,2021
1, ‘a flat’: the ground should be flat. The drug application field should be fine ploughing, to ensure that the ground is flat, no large clods of soil, no potholes.
2, ‘two even’: medicine in the carrier to mix evenly, spray or spread poisonous soil to be uniform.
3、‘Three’：the application time is accurate, the application amount is accurate, the application plot area is accurate. Such as 40% oat dicamba control of wild oats, before sowing, 3 kg / ha with drugs.
4, ‘four look’: look at the seedling, grass, weather, soil quality. It is not easy to apply medicine to unrooted or weak seedlings: according to the type of weed and growth of medicine; lower temperatures when the amount of medicine in the upper limit of medicine; sticky soil with a higher amount of medicine, sandy soil with a smaller amount of medicine; soil drying does not use medicine.
5, ‘five do not’: weak seedlings do not apply medicine; paddy water shallow less than 3 cm or water depth flooded over the heart leaves do not apply medicine; field soil is too dry do not apply medicine; heavy rain or dew on the leaves do not apply medicine; paddy leakage field do not apply medicine.
(v) Knowing the performance of chemicals. Know whether the chemicals are easy to volatilise, photolysed, and whether they are easy to undergo physical or chemical reactions in the soil.
(F) clear ‘main part of the attack’. General soil treatment of herbicides ‘main attack site’ is just sprouting weeds, young stems and leaves and other parts, that is, before 3 leaves. Sulfoxaflor in the weed in full bloom for stem and leaf treatment, absorbed by the stem and leaves and then conduct to other tissues.
(G) the use of time reasonable. Such as the enemy barnyard in the 2-leaf period, butachlor in the 2-3 days before sowing, gramoxone, glyphosate with the increase in the leaf area of weeds and improve the effect.
(H) play the role of water. Xicaojing, Goer, Wo Dazhuang, Nongdezhi, etc. Keep the water layer of 4-6 cm after application, can play the role of medicine, do not produce drug damage; and kill grass dan, herbicide ether in the field waterlogging is easy to produce drug damage.
(ix) Prohibit indiscriminate mixing. Herbicide mixing can improve efficacy, expand the kill spectrum, but blind mixing, easy to cause damage. Such as the enemy can not be mixed with organophosphorus or carbamate; dimethyl tetrachloride can not be mixed with acidic pesticides.
(J) cleaning spraying equipment. Spraying machine with herbicides should be cleaned, can be first rinsed with water, and then wash with soapy water or 2-3% alkaline water several times, and then finally rinse with water.
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