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Practice has proved that spraying pesticides in summer, whether for food crops, vegetable crops, cash crops, or fruit trees, should be the best time between 8:00 am and 5:00 pm. What is the reason for this?
This is because: around 9 am, the general dew is dry, the temperature is not too high, it is the sunrise, pests feeding, activity, mating the most vigorous time, so the medication at this time, will not be washed or diluted by the dew Reduce the efficacy of the drug, and will not affect the efficacy of the drug due to high temperature. On the contrary, the use of drugs at this time will increase the chances of pests feeding and taking medicine, effectively improving the lethality of pesticides. At about 5 o'clock in the afternoon, the sun is already westward. It is the "Japanese medicine Xishan evening". At this time, the light is getting weaker, and the night-time pests are active (feeding, mating, etc.). Higher killing effect.
Also note that it is not advisable to spray pesticides at noon. Therefore, the temperature is high, the sun is strong, and some pests are afraid of glare and hide in the backlight, or even stop the activity. In addition, the drug decomposes rapidly at high temperatures, so the efficacy is reduced. At the same time, the general drug solution is evaporated at noon, which is easy to cause poisoning of humans and animals. The prevention and control of common diseases and insect pests in vegetables in high temperature and high humidity seasons in China is currently in the climate of high temperature and high humidity. It is suitable for the spread of various diseases and insect pests of vegetables. In order to ensure the harvest of summer vegetables, it is necessary to do a good job in the prevention and control of various common pests and diseases in vegetable production. .
First, strengthen cultivation management, improve the disease resistance of vegetables, drain the accumulated water in time, and enhance the vitality of the root system. The shed vegetable should be uncovered to reduce the temperature and humidity in the shed and improve the disease resistance of the plant.
Second, the use of chemicals to control the following pests and diseases (1) powdery mildew: start the drug at the beginning of the beginning. It can be sprayed with 10% Shigao water dispersing agent 1000-1500 times liquid or 40% DuPont Fuxing emulsifiable oil 5000 times liquid, once every 7 days, even 2 to 3 times. Or to carry out the shack, the shed can be killed at 42-45 ° C for 2 hours at noon to kill the pathogen, the effect is obvious.
(2) Cruciferous soft rot: 72% agricultural streptomycin 4000 times solution; neomycin phytomycin 4000 times liquid or 77% can kill 600 ~ 800 times liquid.
(3) Melon aphids: 0.6% sea positive insecticide 1250 ~ 1500 times liquid.
(4) Yellow-curved Bounce: 40% lass lotion 1000 times liquid or 90% crystal trichlorfon 800 times liquid spray, even 2 to 3 times, serious fields can be combined with irrigation roots.
(5) Plutella xylostella: 5% Regent 1000-1500 times liquid or 5% TAI Bao EC 2000 times liquid control.
(6) Red spider: 20% 哒螨 3000 3000 times liquid plus 1% worm light 3000 times solution.
This is because: around 9 am, the general dew is dry, the temperature is not too high, it is the sunrise, pests feeding, activity, mating the most vigorous time, so the medication at this time, will not be washed or diluted by the dew Reduce the efficacy of the drug, and will not affect the efficacy of the drug due to high temperature. On the contrary, the use of drugs at this time will increase the chances of pests feeding and taking medicine, effectively improving the lethality of pesticides. At about 5 o'clock in the afternoon, the sun is already westward. It is the "Japanese medicine Xishan evening". At this time, the light is getting weaker, and the night-time pests are active (feeding, mating, etc.). Higher killing effect.
Also note that it is not advisable to spray pesticides at noon. Therefore, the temperature is high, the sun is strong, and some pests are afraid of glare and hide in the backlight, or even stop the activity. In addition, the drug decomposes rapidly at high temperatures, so the efficacy is reduced. At the same time, the general drug solution is evaporated at noon, which is easy to cause poisoning of humans and animals. The prevention and control of common diseases and insect pests in vegetables in high temperature and high humidity seasons in China is currently in the climate of high temperature and high humidity. It is suitable for the spread of various diseases and insect pests of vegetables. In order to ensure the harvest of summer vegetables, it is necessary to do a good job in the prevention and control of various common pests and diseases in vegetable production. .
First, strengthen cultivation management, improve the disease resistance of vegetables, drain the accumulated water in time, and enhance the vitality of the root system. The shed vegetable should be uncovered to reduce the temperature and humidity in the shed and improve the disease resistance of the plant.
Second, the use of chemicals to control the following pests and diseases (1) powdery mildew: start the drug at the beginning of the beginning. It can be sprayed with 10% Shigao water dispersing agent 1000-1500 times liquid or 40% DuPont Fuxing emulsifiable oil 5000 times liquid, once every 7 days, even 2 to 3 times. Or to carry out the shack, the shed can be killed at 42-45 ° C for 2 hours at noon to kill the pathogen, the effect is obvious.
(2) Cruciferous soft rot: 72% agricultural streptomycin 4000 times solution; neomycin phytomycin 4000 times liquid or 77% can kill 600 ~ 800 times liquid.
(3) Melon aphids: 0.6% sea positive insecticide 1250 ~ 1500 times liquid.
(4) Yellow-curved Bounce: 40% lass lotion 1000 times liquid or 90% crystal trichlorfon 800 times liquid spray, even 2 to 3 times, serious fields can be combined with irrigation roots.
(5) Plutella xylostella: 5% Regent 1000-1500 times liquid or 5% TAI Bao EC 2000 times liquid control.
(6) Red spider: 20% 哒螨 3000 3000 times liquid plus 1% worm light 3000 times solution.
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