At present, the pesticide residues that must be tested for export to the EU market are: DDT, 666, triclosan, acephate, methamidophos, fenvalerate (including various isomers), cypermethrin, There are 11 pesticides such as bifenthrin, fenpropathrin, argentin, and triazophos. The maximum allowable residue (MRL) is several times or hundreds of times lower by 0.1 PPM. Recently, the Ministry of Agriculture issued a document specifically prohibiting the use of fenvalerate in tea plants. Subsequently, the state explicitly prohibits the use of the following pesticides on tea plants: DDT, BHC, methamidophos, methamidophos acetate, dicofol, fenvalerate (including various isomers) and other highly toxic, high-residue pesticides. The pyrethroid pesticides are commonly used in tea plantations and should be used with caution; dimethoate should be withdrawn. The recommended pesticides are: deltamethrin, imidacloprid, endosulfan, diflubenzuron, diflubenzuron, chlorazanone, tea locust virus, Beauveria bassiana, and Shiliu Mixture (for garden use).
Countermeasures and measures:
The first is to strengthen the publicity and source management of the scientific use of pesticides in tea areas. Propaganda pesticide species that are prohibited from being used in tea plants, pine oil mixture, stone flow mixture, Bordeaux mixture, aluminum arsenate, soap, lime, lime ammonia, etc. are basic pesticides. The combination of acid and alkaline pesticides will break down, reduce efficacy, and even cause phytotoxicity. Most organophosphorus insecticides such as dimethoate, safrole, malathion, ammonium phosphate, and some microbial pesticides such as kasugamycin, jinggangmycin, quercetin, etc., as well as porcine rice net and dexamethasone, Dyson's ammonium, etc., cannot be mixed with alkaline pesticides, that is, the crops are limed or ash, and the above pesticides cannot be sprayed.
Second, mixed pesticides that are destroyed by the emulsion cannot be mixed. Calcium-containing pesticides such as calcium arsenate, stone flow agents, and calcium methyl arsenate. Generally cannot be mixed with emulsion pesticides, and soap can not be added. Because creams and soaps chemically react with calcium-containing agents, calcium soap precipitates. Emulsions are destroyed, efficacy is reduced, and phytotoxicity can occur.
Third, fungicides Pesticides can not be mixed with microbial pesticides. The bactericide has a direct killing effect on microorganisms, and if the micro-organisms are mixed, they are killed and the microbial pesticides fail.
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