With the improvement of people's health awareness, many people like green pollution-free foods. Biological pesticides are increasingly valued by the majority of growers. The following are misunderstandings of microbial pesticides? Angle Valve,Brass Angle Valve,Plastic Brass Angle Valve,Chrome Plated Brass Angle Valve Zhejiang minmetals huitong import and export Co., Ltd , https://www.zjminmetals.com
The survey found that there are still some misunderstandings in the process of using microbial pesticides by farmers, so that their efficacy is not well exerted.
1. Use under the condition of low temperature
When using microbial pesticides, it is generally required to have a higher ambient temperature. Some farmers use the microbial live pesticides, ignore the influence of environmental factors, and do not pay attention to the use of high temperature weather conditions, the control effect is not good. Tests have shown that in the environment of 25 ° C - 30 ° C, the control effect after spraying is 1-2 times higher than that in the environment of 10 ° C - 15 ° C.
Second, use in dry weather conditions
Use in dry weather, such as sunny days from 10 am to 4 pm, etc. Under high temperature and dry weather conditions, the application is not good, mainly due to insufficient ambient humidity. For example, Beauveria bassiana in fungal insecticides, the preparation mainly contains white zombie spores, which can be germinated by direct contact with the worms or eaten into the digestive tract by the pests under conditions of relative humidity of 60%. The insects multiply and produce beauverin, which causes the pests to die slowly. Therefore, it is best to spray when the humidity is high, such as after cloudy, rain or morning.
Third, after use, it was washed by heavy rain
Microbial spores are most afraid of heavy rain, because heavy rain will wash away the sprayed bacteria. However, if it is light rain after 5-6 hours of spraying, it will not reduce the efficacy, but it will improve the control effect, because the light rain is very beneficial to the spore germination, and the pest will accelerate the death once it is eaten. Therefore, be sure to listen to the weather forecast before using microbial pesticides.
Fourth, mixed with fungicides
For example, the genus Aspergillus, as a fungal insecticide, is achieved by the action of live spores of O. sinensis. After the application, live spores infect the aphids and cause death, which can cause continuous infection and cause a large number of deaths. However, as a living fungus, if mixed with a fungicide, they are killed by the fungicide and lose the insecticidal effect.
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