How to mix pesticides and pesticides
The mixing of pesticides and pesticides is a complex problem, not all pesticides can be mixed, in the mixing should pay attention to the following points:
The main results are as follows: (1) pH is an important factor affecting the effectiveness of each component. Under alkaline conditions, dithiocarbamate fungicides such as carbamate, pyrethroid vinegar insecticides, thiram, dithiocarbamate and dithiocarbamate are prone to hydrolysis or complex chemical changes, thus destroying the original structure. Under acidic conditions, 2mae4murD sodium salt, dimethyl tetrachloride sodium salt and diformamidine will decompose, thus reducing the efficacy.
(2) Organic sulfur and organophosphorus pesticides should not be mixed with pesticides containing copper. For example, dithiocarbamate fungicides, 2mae4murD herbicides mixed with copper preparations will lose their activity because of the complexation of related components with copper ions.
(3) microbial insecticides and endogenous organophosphorus insecticides should not be mixed with fungicides.
(4) the mixture of EC or wettable powder requires no delamination, oil slick, precipitation and so on.
(5) the chemical damage of the mixture should be avoided, and the chemical changes of the active components in the mixture may cause drug damage. For example, the mixture of stone sulfur mixture and Bordeaux liquid can produce harmful copper sulfide and increase the content of soluble copper ions; paspalum and butachlor can not be mixed with organophosphorus and carbamate insecticides.
(6) the main kinds of mixed use: the mixture of more than two kinds of insecticides ①, which are mainly used at present, such as A-enemy powder, B-enemy powder, Xindui EC, Kangzhiling, compound fruit and so on. ② is a mixture of one or more insecticides and one or more fungicides, mainly in the form of fenitrothasone plus isomaectin, dimethoate, methamidophos, etc., most of which are currently used. ③ is mixed with two or more fungicides, and the main varieties are companion Shuang, Metalaxyl manganese zinc, polysulfide gel suspension and bacilli. The mixture of two or more ④ herbicides is mainly used in our country, such as the application of 2mae4murine D butyl ester in wheat, atrazine plus Duror, atrazine plus 2mae4murine D butyl ester in corn field and so on. ⑤ insecticides, fungicides and herbicides are mixed.
Excerpt from: Hua Feiwen. How to mix chemical fertilizers and pesticides [J]. Rural know-it-all, 2017, (08): 48-49.
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