Pollution-free strawberry cultivation medication instructions

1. Strictly select pesticides and strictly implement pesticide safety intervals

For the production of pollution-free strawberries, biological pesticides should be used preferentially, and high-efficiency, low-toxic, low-residue chemical pesticides should be used selectively. These pesticides mainly include: (1) insecticides such as Bt series, avermectin series, pyrethrins, plant extracts (such as bitter lactone, capsaicin, etc.), insect hormones (rice, card gram) , Taibao), a small number of organophosphorus pesticides (trichlorfon, Le Siben, agricultural music) and other pesticides such as imidacloprid. (2) fungicides, such as Bordeaux mixture, polyoxygen, methyl thiophanate, Shigao, Fuxing, can be killed, chlorothalonil, terfena, baco, pyrimethanil and the like. (3) Herbicides, such as grasses, grasses, etc. (4) Aerosols, such as sulfur fumigants, sclerotherapy, smouldering agents, etc. In the whole process of strawberry production, it is strictly forbidden to use methamidophos, carbofuran, chlorpyrifos, omethoate, dicofol, methyl 1605, sodium pentachlorophenol, ketone, chloropicrin, and herbicide ether. 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 intervals of various pesticides. Generally, the strawberries are harvested before or after the harvesting of the strawberries for about 10 days. For pesticides with long residual effects, such as imidacloprid, more than 15 days after the application, fresh fruits should be harvested.

Second, pay attention to prevention and treatment strategies and accurately grasp the appropriate period of prevention and treatment

The control of noctual pests such as Spodoptera litura should master the principle of "treatment and pressure two", that is, the prevention and control of the first generation of low-grade second-generation pest base, and should be controlled in the evening. The control of red spiders should be in the stage of spotting. The occurrence of strawberry virus disease is closely related to aphids. As long as the aphids are well controlled, the incidence of viral diseases can be significantly reduced. At the same time, according to the occurrence of pests and diseases in the field, it is very important to accurately select the method of application. If you can take the rule of treatment, you can never use it locally.

Third, the right amount, alternating and scientific medication

Some producers have some misunderstandings of medication. They think that the greater the dose, the better the disease prevention effect. In fact, this not only increases the cost, but also easily causes phytotoxicity. Therefore, what medicine to use and how much to use should be strictly controlled. In addition, one of the effective methods for overcoming and delaying drug resistance is to alternately use two or more pesticides with different action mechanisms, and to pay attention to the alternate use of agents that do not have cross-resistance, such as the need for mixed pesticides, should be matched Currently used.