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1. Strict selection of pesticides and implementation of pesticide safety intervals
When pesticides are used in the production of pollution-free strawberries, strict screening should be carried out, and biological pesticides should be used preferentially, and high-efficiency, low-toxic, low-residue chemical pesticides should be selectively used. These pesticides mainly include: 1 insecticide. Bt series, avermectin series, pyrethrins, plant extracts (such as bitter lactone, capsaicin, etc.), insect hormones (Miman, Kadike, Yitaibao), a few organophosphorus pesticides (enemy hundred) Insects, lesbian, agricultural land) and other pesticides, such as imidacloprid. 2 fungicides. Bordeaux mixture, polyoxygen, methyl thiophanate, Shigao, Fuxing, can be killed, chlorothalonil, terfena, baco, pyrimethanil and the like. 3 herbicides. Grass and grass can be used. 4 aerosol sulphur fumigant, keering, smecticide and so on.
In the whole process of strawberry production, it is forbidden to use methamidophos, carbofuran, insecticidal mites, omethoate, dicofol, methyl 1605, sodium pentachlorophenol, ketone, chloropicrin, herbicide ether, etc. Residual pesticides.
The pesticide residue of strawberry fresh fruit is closely related to the length of the last application time. When the interval is short, the amount of pesticide residues is large, and vice versa. Therefore, producers must strictly control the safety interval of pesticides. Generally, the strawberries should be harvested before or after harvesting for 10 days or so. For pesticides with long residual period, such as imidacloprid, they should be harvested more than 15 days after application.
Second, pay attention to prevention and treatment strategies and accurately grasp the appropriate period of prevention and treatment
According to the law of growth and decline of pests and diseases, pay attention to prevention and control strategies, accurately grasp the appropriate period of prevention and treatment, and accurately select suitable pesticides. The effect of doing more with less. For example, the prevention and control of red spiders should be mastered in the stage of spotting; strawberry virus disease is closely related to aphids, as long as Prevention and control of aphids, the incidence of viral diseases can be significantly reduced.
Third, the right amount, alternating and scientific medication
What kind of pests and diseases, what kind of medicine to use, and how many doses should be used should be strictly controlled.
Pesticides must be used interchangeably to enhance the efficacy of the pesticide and delay the development of resistance to pests. If you need to use mixed pesticides, you should use them now. Before mixing, you should check the “mixed use check tableâ€. For example, mancozeb can be mixed with trichlorfon and dichlorvos, but not with Bordeaux mixture or stone sulfur. Mixtures and the like are mixed.
How to use pesticides in pollution-free strawberry production
Non-polluted strawberries require fresh fruits to be clean, fresh, sweet and sour, and the toxic and harmful substances are lower than the safe eating standards of human body. They should meet the double standards of nutrition and medicine. Under the current conditions, the production of pollution-free strawberries is inseparable from chemical pesticides, but the principle of “strict, accurate and appropriate†must be followed in the course of use.
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