Use microbial pesticides to pay attention to

The new microbial pesticide industry pesticide industry in the 21st century, representing the general direction of plant protection, and its biggest advantage is that contamination can overcome the chemical pesticides on the environment and reduce the amount of pesticide residues in agricultural products while the demonstration microbial pesticide application In the process, the quality and price of agricultural and sideline products will increase substantially, which will beneficially promote rural economic growth and increase farmers' income, and social benefits will be incalculable. As one of the necessary production materials for the production of pollution-free agricultural by-products, microbial pesticides will have huge market demand for future crop pest control. Therefore, the development, industrialization and application of microbial pesticides will be further accelerated, and pesticides in agricultural and sideline products will be reduced. Residues and pollution of farmland ecological environment, sustainable control of major pests and diseases of crops, and meeting the major demand for agricultural science and technology in the industrialized production of pollution-free agricultural products in China will inevitably generate huge social, economic and ecological benefits.

In the current pollution-free cultivation of vegetables, fruits and other crops, microbial pesticides have received more and more attention as the first choice for the production of pollution-free agricultural by-products. However, due to improper use, the result was “fought back”. According to the Xiaobian of China Pesticide Network , in fact, there are many techniques for the use of microbial pesticides:

Tip 1: To master the right temperature. Some farmers do not pay attention to environmental factors when applying microbial live pesticides, do not choose to apply under the conditions of suitable temperature, apply when the temperature is too high, the temperature is low, even in cold weather conditions in winter and early spring, the results can not be reached Expected control effect. This is because microbial pesticides can only show better biological activity under higher temperature conditions, and the temperature is too high or too low, and the effect is not significant. Tests have shown that between 25 ° C and 30 ° C, the effect of microbial live pesticide control after spraying is 1 to 2 times higher than that between 10 ° C and 15 ° C.

Tip 2: Choose the right climatic conditions to apply. If it is applied at a high temperature and dry weather conditions from 10:00 am to 4:00 pm on a sunny day, the results are not as good as expected. This is mainly due to insufficient ambient humidity. Such as Beauveria bassiana, as a fungal insecticide, the preparation mainly contains white zonabulum spores. After application, it is directly contacted with the worm body, or is eaten into the digestive tract by pests on the use, and the spores germinate under suitable conditions in the worm body. Breeding, producing beauverin, etc., causing the pest to die slowly. The hyphae and conidia on the dead worms are transmitted to other healthy worms by contact or by means of airflow, causing epidemics, causing a large number of individual deaths. Beauveria bassiana falling into the soil can also survive the winter in the soil, and then invade the insect body in the second year, continuing the insecticidal effect, and the aftereffect is obvious. Therefore, microbial pesticides should preferably be applied when the humidity is high, such as after cloudy, rain or morning.

Tip 3: Avoid sun exposure when applying. If the high temperature is not avoided, it is easy to cause a decrease in efficacy when applied at noon of strong sunlight. Most microbial live pesticides are most afraid of strong sunlight. Ultraviolet light in sunlight has a lethal killing effect on spores, and ultraviolet radiation can also cause deformation and effect on parasporal crystals. Therefore, microbial pesticides should be selected before 8 am, after 5 pm or on cloudy days. use.

Tip 4: Never apply on rainy days. Spore microbial pesticides are most afraid of heavy rain, because the rain will wash away the sprayed bacteria. However, after spraying (5 to 6 hours later), it will not only reduce the efficacy, but will improve the control effect, because the light rain is very beneficial to the spore germination, and the pest will accelerate its death once it is eaten. Therefore, it is necessary to determine the application time according to the weather forecast to avoid rainstorms on rainy days or after application.

Tip 5: Avoid mixing with chemical pesticides . For example, the genus Aspergillus, as a fungal insecticide, is achieved by the action of live spores of O. sinensis. After application, live spores infect aphids and cause death, which can cause continuous infection and cause a large number of deaths. If mixed with chemical pesticides, the living fungus is killed and killed, and naturally loses its insecticidal effect.

Tip 6: Do not mix with acidic or alkaline substances. Most microbial pesticides encounter acidic or alkaline substances, and their biological activities will be reduced to different extents, thus reducing the control effect.