The issue of vegetable quality and safety has been paid more and more attention. How to control the residue of pesticides in vegetables is the key to ensure the quality and safety of vegetables. How to take reasonable measures to reduce the residual amount of pesticides in vegetables? In addition to selecting the place where the vegetables are produced, and selecting the vegetable varieties resistant to pests and diseases, the following measures should be taken:
First, the use of reasonable pesticides.
1. Limit the scope of use of pesticides. It is forbidden to use high-toxic and high-residue chemical pesticides such as methamidophos and carbofuran on vegetables, and promote the use of biological pesticides and high-efficiency, low-toxicity and low-residue pesticides such as bt, oxymatrine, cadmium, depletion, Dish hi and so on.
2, based on prevention, disinfection. The soil or seeds are sterilized before sowing. The agents include carbendazim, metalaxyl, pulic, and mancozeb.
3. Scientifically select the dosage form and usage of pesticides. When the emulsifiable pesticide spray is used, there are many residues. Powder, water, granules and other dosage forms can be used for powder spraying, seed dressing or spreading. Greenhouse vegetables should use aerosols or powders to control pests and diseases.
4. Control the amount and frequency of pesticides. The larger the application rate, the higher the concentration, the more the number of times, the shorter the interval between application and the higher the residue. When applying pesticides, farmers should strictly follow the dosages and times specified in the instructions. Do not increase the dosage and the number of applications.
5, using low-volume high-pressure spray technology. The application of this technology can not only reduce the pesticide residue on vegetables, but also has superior control effect, ergonomics and pesticide utilization than conventional spray.
6. Strictly observe the safety interval. Stop using chemical pesticides within a certain period of time before harvesting, and vegetables that do not meet the safety interval of pesticides should be eliminated from marketing.
Second, the use of a variety of physical measures to control pests and diseases.
1. High temperature shack: In the summer, the vegetable shed is sealed, and the sunny day is selected for high temperature shacks for 5 to 7 days. The temperature is controlled at 60 ° C ~ 70 ° C, which can effectively kill the bacteria and insects in the shed and soil surface. egg.
2, light trapping: the use of pest phototaxis, in the place where conditions, the installation of black light or insecticidal lamps to trap pests, can effectively trap adult mosquitoes, bean wild mites and Spodoptera litura.
3, yellow plate trapping: According to the strong characteristics of pests on yellow, the use of yellow plate oil in the field or greenhouse to control the pests such as vegetable aphids, whitefly and Liriomyza sativae, the effect is very good.
4, artificial catching insects. 5, gauze block insects: set the gauze at the shed ventilation vent, can block the winged mites, whitefly and other pests moved into the shed.
First, the use of reasonable pesticides.
1. Limit the scope of use of pesticides. It is forbidden to use high-toxic and high-residue chemical pesticides such as methamidophos and carbofuran on vegetables, and promote the use of biological pesticides and high-efficiency, low-toxicity and low-residue pesticides such as bt, oxymatrine, cadmium, depletion, Dish hi and so on.
2, based on prevention, disinfection. The soil or seeds are sterilized before sowing. The agents include carbendazim, metalaxyl, pulic, and mancozeb.
3. Scientifically select the dosage form and usage of pesticides. When the emulsifiable pesticide spray is used, there are many residues. Powder, water, granules and other dosage forms can be used for powder spraying, seed dressing or spreading. Greenhouse vegetables should use aerosols or powders to control pests and diseases.
4. Control the amount and frequency of pesticides. The larger the application rate, the higher the concentration, the more the number of times, the shorter the interval between application and the higher the residue. When applying pesticides, farmers should strictly follow the dosages and times specified in the instructions. Do not increase the dosage and the number of applications.
5, using low-volume high-pressure spray technology. The application of this technology can not only reduce the pesticide residue on vegetables, but also has superior control effect, ergonomics and pesticide utilization than conventional spray.
6. Strictly observe the safety interval. Stop using chemical pesticides within a certain period of time before harvesting, and vegetables that do not meet the safety interval of pesticides should be eliminated from marketing.
Second, the use of a variety of physical measures to control pests and diseases.
1. High temperature shack: In the summer, the vegetable shed is sealed, and the sunny day is selected for high temperature shacks for 5 to 7 days. The temperature is controlled at 60 ° C ~ 70 ° C, which can effectively kill the bacteria and insects in the shed and soil surface. egg.
2, light trapping: the use of pest phototaxis, in the place where conditions, the installation of black light or insecticidal lamps to trap pests, can effectively trap adult mosquitoes, bean wild mites and Spodoptera litura.
3, yellow plate trapping: According to the strong characteristics of pests on yellow, the use of yellow plate oil in the field or greenhouse to control the pests such as vegetable aphids, whitefly and Liriomyza sativae, the effect is very good.
4, artificial catching insects. 5, gauze block insects: set the gauze at the shed ventilation vent, can block the winged mites, whitefly and other pests moved into the shed.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Activated Carbon For Air Purification
4Mm Pellet Activated Carbon,Solvent Recovery,Activated Carbon
Coal-Based Activated Carbon,Activated Carbon Co., Ltd. , http://www.nbactivatedcarbon.com