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Misunderstanding 1: The temperature is too low when applied. Some farmers do not pay attention to environmental factors when applying microbial live pesticides, do not choose to apply under high temperature weather conditions, even in winter and early spring cold weather conditions, so the expected control effect is not achieved. This is because higher temperatures are required for the application of biological pesticides. 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.
Myth 2: Apply in dry weather. Such as high temperatures and dry weather conditions and other sunny morning before 10 o'clock to 4 o'clock in the afternoon administration, reflecting the effect of poor farmers. This is mainly because the ambient humidity caused by not enough. The Beauveria bassiana, as fungal pesticide formulation consisting essentially stiff white viable spores, parasites after administration by direct contact, or to be eaten by pests into the digestive tract was, under suitable conditions spore germination, the insect body Breeding, producing beauverin, etc., causing the pest to die slowly. Hyphae and spores on the death of the parasite, by contact or by means of the air flow and spread to infect other healthy worms, thereby causing an epidemic, causing a large number of individual deaths. Fall into the soil bassiana can overwinter in the soil, the second year of re-infection of parasites, pesticides continue to play a role in aftereffect obvious. Therefore, it is preferable to apply when the humidity is high, such as after a cloudy day, after a rain, or in the morning.
Misunderstanding 3: Do not avoid the sun. There is no noon application that avoids high temperature and strong sunlight, causing a decrease in efficacy. Microbial live pesticides are most afraid of strong sunlight. The ultraviolet rays in the sun have a lethal killing effect on the spores, and the ultraviolet radiation can also cause deformation and effect on the parasporal crystals. Therefore, it is necessary to use it after 4 o'clock in the afternoon or on a cloudy day, and the effect will be greatly exerted.
Misunderstanding 4: Mixed with fungicides. 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. However, as a living fungus, if mixed with a bactericide, they are killed by the bactericide and naturally lose their insecticidal action.
In the current vegetables, fruits and other crops, pollution-free cultivation, microbial pesticides more and more attention. In order to improve the use of microorganisms in vivo, beware of misunderstandings when applying them.
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