1, The appropriate temperature. Some farmers in the application of microbial living pesticides, do not pay attention to environmental factors, do not choose the appropriate conditions of temperature application, the temperature is too high, the temperature is low when applied, even in winter and early spring cold weather conditions, the results can not be achieved Expected control effect. Because microbial pesticides only in the higher temperature conditions, in order to reflect the good biological activity, the temperature is too high or too low, the effect is not significant. Experiments show that between 25 ℃ ~ 30 ℃, after spraying microbial biological pesticide control effect than in 10 ℃ ~ 15 ℃ between the 1 to 2 times higher.
2, Suitable for application under climatic conditions. Such as sunny morning 10 o’clock to 4 o’clock before the high temperature and dry weather conditions under the application, the results also failed to achieve the desired control effect. This is mainly due to the lack of environmental humidity caused by. Such as Beauveria bassiana, as a fungal insecticide, the preparation mainly contains white stalactive spores, after application by direct contact with the parasites, or in the insects into the digestive tract, in the appropriate conditions spore germination in the body Breeding, resulting in white beetles, etc., leading to slow death of pests. Death of the parasites on the hyphae and conidia, through contact or by means of air flow and spread to other healthy parasites on the infection, resulting in epidemic, causing a large number of individual deaths. Beauveria blooms fall into the soil can also be in the winter, the second year and then infected insects, continue to play an insecticidal effect, after the effect is obvious. Therefore, the best choice for microbial pesticides cloudy, rain or morning when the humidity is applied.
3, When applied to avoid sun exposure. If not to avoid high temperature, in the strong sunlight at noon application, easily lead to decreased efficacy. Most microbial live pesticides, most afraid of strong sunlight. Ultraviolet rays in the sun have a deadly killing effect on the spores, and the effects of ultraviolet radiation on the sporadic crystals can also degrade and degrade. Therefore, the best choice for microbial pesticides is before 8:00 am, after 5:00 pm or cloudy use.
4, Should not be applied in the rain. Spore microbial pesticides most afraid of heavy rain washed, because the rain will spray the bacteria liquid washed away. But after spraying (5 to 6 hours later) encountered rain, not only will not reduce the efficacy, but can improve the control effect, because the rain is very beneficial to sprouting sprouts, pests once after eating will accelerate its death. So according to the weather forecast to determine the application time, to avoid rain or after the rain was washed.
5, Should not be mixed with chemical pesticides. Such as Streptomyces lucidum, as a fungal insecticide, the efficacy is through the role of oral fungus spores to achieve. After the application of live spores infected aphids and lethal, sustainable infection, causing a large number of deaths. If mixed with chemical pesticides, live fungi were killed and killed, the natural loss of insecticidal effect.
6, Should not be mixed with acidic or alkaline substances. Most microbial pesticides in acidic or alkaline substances, biological activity will be reduced to varying degrees, thereby reducing the control effect.