Chemical control is an indispensable technology for cotton aphid control technology. Cotton farmers are most concerned about this control technology, here is to sort out the pesticide control technology.
From the individual of cotton aphid, the pesticides sold on the market to control aphids are easy to kill individual cotton aphids, but for the cotton aphid population, it is more difficult to control, because the high reproduction rate of the cotton aphid population, once the pesticide is applied, destroying its living environment and killing natural enemies, it will stimulate the cotton aphid population to reproduce faster or produce winged aphids, accelerate the spread of spread, and it is possible to spread from a point of prevention to the whole field, that is, it is often said that the cotton aphid is randomly beaten by pesticides. Regarding the current viewpoint on the prevention and control of cotton aphids, it can be seen in the article "Temperature and humidity are suitable, be vigilant against the occurrence and spread of cotton aphids" by Tianshan Plant Protection. There are cotton aphids are not terrible, do not rush to achieve, just afraid of disrupting the war blind medicine. Cotton aphid point tablets occur when the tablets are applied to control, and the whole field occurs to meet the standard control.
First, the point control. Cotton aphids into the cotton field must be from less to more process, cotton aphid occurrence has not reached the general development period, the harm to cotton must show the central plant and point plate occurrence state, this period to more cotton field investigation, found the center point on the point of the point with the sprayer point control. Spot control, one is to reduce the number of cotton aphid mouths, proliferation and diffusion rate, and the other is to cultivate and control the natural enemies of cotton aphids.
Second, the control of the general development period. It refers to the aphid plant rate of cotton aphids in the cotton field reaching more than 16%, that is, the peak period of cotton aphids. This period is also a large-scale migration period of cotton aphids, the most prosperous period of migratory aphids, such as the period when cotton aphids walk in the evening and hit their faces, from the calendar year and the situation of cotton aphids in the field, this period is from the end of June to the beginning of July. The largest number of cotton aphid mouths in cotton fields is from late July to early August. After years of fighting with cotton aphids, the use of drugs to prevent and control cotton aphids is endless, and can only control the spread rate of cotton aphids. Once the field ecology is out of balance, the proliferation rate of cotton aphids can only be controlled several times, and the cotton aphids will fade until early August. The basis of deferred control is compliance control. When the top three main stems of cotton flatten all cotton aphids reach more than 300 heads, the curly leaf plant rate exceeds 10%, and the benefit-harm ratio is less than 1: 500, it is necessary to control pesticides in time. If the leaf flow area of the curly leaf is large, it can be washed once with the urine wash, and the oil leaf prevention and control effect caused by the cotton aphid is better.
There are many pesticides for the prevention and control of cotton aphids, and there are 2690 pesticides for the control of aphids on the China Pesticide Information Network. The recommended pesticides here are: acetamidine, imidacloprid, thiamethoxine, avermectin, reedine, matrine, neem, alenazine, fluoridoxonamide, etc., and it is not recommended to kill ticks, butyl thiamine, CPavir, amidoxenide, endovir, endovir, dichlorvos, oxylego, malathion, octylthion and other organophosphorus and paternoids and other broad-spectrum natural enemy pesticides.
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