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One of the main reasons for the large amount of pesticide residues in listed vegetables is that many vegetable farmers often do not pay attention to the interval of pesticide use before the market is listed when controlling pests and diseases. For the rational use of commonly used pesticides on vegetables, the Ministry of Agriculture's pesticide testing has long been clearly defined. The standard for the rational use of pesticides commonly used in vegetables is described below.
First, the fungicide 75% chlorothalonil wettable powder used 7 days before the market; 77% can kill WP 3-5 days; 50% phlegm wettable powder 4-7 days; 70% methyl Bujin WP 5-7 days; 50% Nong Li Ling WP 4-5 days; 50% Garry 58% Swine Mn Zn WP 2-3 days; 64% antivirus WP 3-4 4 days.
Second, insecticide 10% fenprofen emulsifiable oil 2-5 days; 2.5% bromomethrin 2 days; 2.5% kungfu emulsifiable oil 7 days; 5% to Fuling emulsifiable concentrate 3 days; 5% anti-Pu Wei WP 6 days; 10% killing enemy emulsifiable oil for 3 days, 40.7% lesbian emulsifiable concentrate for 7 days; 20% for eliminating emulsified emulsifiable concentrate for 3 days; 35% for fentanyl for 7 days; 20% for fenpropathrin emulsifiable safe interval 3 days; 10% Mapu Like emulsifiable oil safety interval 7 days; quetiaphos 25% emulsifiable oil safety interval 9 days; 50% anti-Converse WP wet interval 6 days; 5% Duobao WP The safety interval is 7 days.
Third, the acaricide 50% bromo oxime ester emulsifiable oil safety interval of 14 days; 50% Torrke WP hardness interval of 7 days.
(Wang Yalin) The weather in the province lasted for a few days, and there was a foggy weather after the rain and snow, which was extremely unfavorable for the growth of vegetables in the protection facilities. In order to ensure the normal growth of vegetables in the protection facilities, the agricultural experts of our province have specially reminded farmers that they should increase their light and heat.
At present, the wintering vegetables in the shed are in the harvesting period, and the winter and spring vegetables are in the seedling stage. The widowed and cold weather will affect the harvesting of the vegetables and the cultivation of the seedlings. Under the conditions of no sunshine or illuminating weather, the photosynthesis efficiency of vegetables will decrease and the plants will grow slowly. In addition, the illuminating weather is not conducive to the increase of indoor temperature in the shed, affecting the growth of vegetables, making the plant grow weaker and more susceptible to pests and diseases.
Agricultural experts suggest that vegetable greenhouses should use scattered light from the sun as much as possible. Under the condition that the indoor temperature does not drop, the straw curtains are uncovered at noon to ensure that the plants see the light every day. If the indoor temperature continues to drop, pay attention to artificially replenish heat and increase the room temperature to ensure that the plants are not affected by cold.
More pesticide knowledge , please pay attention to China Pesticide Network
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