Expert introduction
Zhao Zhanzhou Member of the Chinese Plant Protection Society, senior agronomist, engaged in the teaching and promotion of plant protection technology for more than 30 years, focusing on the integrated prevention and control technology of crop diseases, weeds and weeds, and more familiar with the control of pests and diseases of corn, wheat, pear and apple trees .
As the saying goes, "details determine the success or failure", prevention and control of crop diseases and insect pests, each link can not be taken care of, medication should pay attention to chemical drugs, spraying techniques.
First, what kind of hydration medicine? Water temperature and water quality will affect the efficacy. Use near-surface water as much as possible. In some places, well water often contains more calcium and magnesium, the water quality is harder, and the well water temperature often differs greatly from the air temperature, especially in the summer. Therefore, when using hydrating agents in summer, try to use river water or pond water, but be careful to filter out impurities in the water. Or you can pump well water and put it in the sun or warm place for a while.
Second, how to fight drugs more scientific? Many of today's pesticides have high levels of low dosage and are difficult to hold in their dilutions and doses. Therefore, it is better to use a small amount of water to pour the chemicals one by one in order and separately stir them into mother liquors. Water is quantified and used evenly.
Third, the more types of agents, the better? not good! In principle, it is best not to use more than three fungicides, insecticides and growth regulators or foliar fertilizers. At the same time, it should be noted that the use of different agents may not always be synergistic, but it may sometimes lead to a decrease in efficacy and even to phytotoxicity. Therefore, it is advisable to test or consult a technician before use.
Fourth, when is the spraying safe and efficient? Two principles, one is to facilitate the distribution and absorption of pharmaceuticals, and the other is that the day of spraying is conducive to the liquid medicine quickly drying and forming a film on the surface of the plant body. Most of the pests, germs and weeds are suitable for growing in the temperature range of 25-30 degrees Celsius, and the crops grow comfortably. Therefore, in most cases, the use of pesticides is better when the temperature is within the range of 20 to 30°C. Spring is around noon and summer is before 10 am or after 4 pm. Some of the pests such as blind borers, ground tigers, cotton bollworms and other night-time habits, so the best time for spraying at dusk, whitefly in the morning dew more when spraying control effect is higher. In winter, it should be sprayed before and after noon.
Fifth, is it better to spray the more carefully the efficacy? No. Under the premise of guaranteeing the atomization of the sprayed liquid, it is best to spray wet the leaf or fruit surface of the crop and the liquid has not yet flown. Repeated spraying of the same site, when the liquid reaches a certain amount, it will flow, reducing the efficacy. At the same time, the nozzle should keep a certain distance from the plant body, and do not spray the nozzle close to the blade. Generally, the old backpack sprayer needs 30 centimeters, and the large-scale motorized sprayer needs 60 centimeters to 100 centimeters.
Sixth, reduce the water consumption per mu and increase the dosage of sprayer per barrel. Is it high work efficiency and good efficacy? not good. Most of the commonly used spray instruments in China belong to conventional spray instruments, and the sprayed droplets are relatively large, the proportion of covered crops is small, and the efficacy is poor. If arbitrarily increasing the concentration of pharmaceuticals used, reducing the amount of water per unit area will not only reduce the efficacy, and may even cause phytotoxicity and contaminate the soil. This is an erroneous, quick-and-immediate, and error-free operation method.
Zhao Zhanzhou Member of the Chinese Plant Protection Society, senior agronomist, engaged in the teaching and promotion of plant protection technology for more than 30 years, focusing on the integrated prevention and control technology of crop diseases, weeds and weeds, and more familiar with the control of pests and diseases of corn, wheat, pear and apple trees .
As the saying goes, "details determine the success or failure", prevention and control of crop diseases and insect pests, each link can not be taken care of, medication should pay attention to chemical drugs, spraying techniques.
First, what kind of hydration medicine? Water temperature and water quality will affect the efficacy. Use near-surface water as much as possible. In some places, well water often contains more calcium and magnesium, the water quality is harder, and the well water temperature often differs greatly from the air temperature, especially in the summer. Therefore, when using hydrating agents in summer, try to use river water or pond water, but be careful to filter out impurities in the water. Or you can pump well water and put it in the sun or warm place for a while.
Second, how to fight drugs more scientific? Many of today's pesticides have high levels of low dosage and are difficult to hold in their dilutions and doses. Therefore, it is better to use a small amount of water to pour the chemicals one by one in order and separately stir them into mother liquors. Water is quantified and used evenly.
Third, the more types of agents, the better? not good! In principle, it is best not to use more than three fungicides, insecticides and growth regulators or foliar fertilizers. At the same time, it should be noted that the use of different agents may not always be synergistic, but it may sometimes lead to a decrease in efficacy and even to phytotoxicity. Therefore, it is advisable to test or consult a technician before use.
Fourth, when is the spraying safe and efficient? Two principles, one is to facilitate the distribution and absorption of pharmaceuticals, and the other is that the day of spraying is conducive to the liquid medicine quickly drying and forming a film on the surface of the plant body. Most of the pests, germs and weeds are suitable for growing in the temperature range of 25-30 degrees Celsius, and the crops grow comfortably. Therefore, in most cases, the use of pesticides is better when the temperature is within the range of 20 to 30°C. Spring is around noon and summer is before 10 am or after 4 pm. Some of the pests such as blind borers, ground tigers, cotton bollworms and other night-time habits, so the best time for spraying at dusk, whitefly in the morning dew more when spraying control effect is higher. In winter, it should be sprayed before and after noon.
Fifth, is it better to spray the more carefully the efficacy? No. Under the premise of guaranteeing the atomization of the sprayed liquid, it is best to spray wet the leaf or fruit surface of the crop and the liquid has not yet flown. Repeated spraying of the same site, when the liquid reaches a certain amount, it will flow, reducing the efficacy. At the same time, the nozzle should keep a certain distance from the plant body, and do not spray the nozzle close to the blade. Generally, the old backpack sprayer needs 30 centimeters, and the large-scale motorized sprayer needs 60 centimeters to 100 centimeters.
Sixth, reduce the water consumption per mu and increase the dosage of sprayer per barrel. Is it high work efficiency and good efficacy? not good. Most of the commonly used spray instruments in China belong to conventional spray instruments, and the sprayed droplets are relatively large, the proportion of covered crops is small, and the efficacy is poor. If arbitrarily increasing the concentration of pharmaceuticals used, reducing the amount of water per unit area will not only reduce the efficacy, and may even cause phytotoxicity and contaminate the soil. This is an erroneous, quick-and-immediate, and error-free operation method.
Inner Mongolia Xuanda Food Co., Ltd. , https://www.xuandagroup.com