The use of bio- pesticides technical points

Pollution-free agricultural production has become the development direction of agricultural production . Agricultural products in the production process, the use of biological pesticides to control pests and diseases have attracted worldwide attention. Currently , bio-pesticides in food, vegetables, fruit trees, flowers , widely used . However,backpack garden sprayers due to the effect of biological pesticide use is affected by many factors. In practical applications, there are a series of problems . The scientific use of biological pesticides should make maximum use of favorable factors, to overcome and avoid disadvantages. In use should pay attention to the following points.

First, choose a different control objects according to different varieties of pesticides currently producing bio-pesticides are insecticides, fungicides and use of microbial products made ​​on behalf } antibiotic insecticides, fungicides and other types. In the practical application of biological pesticides . Many people on the nature of biological pesticides are not completely understood, mistaken biological insecticide, fungicide can prevent all diseases , pests , rather than indiscriminate widespread use , it will not only not receive the desired effects , but also delays Prevention period. Highly selective biological drugs , such as Bacillus thuringiensis (Bt) effective prevention and treatment of Lepidoptera larvae , but not leafhopper Homoptera pathogenicity , and different varieties of Bacillus thuringiensis based on several important pests effect there are differences . Further , according to the characteristics of different types of pest feeding biological pesticides, such as insects of Lepidoptera Bt good results, will be distributed in plants after spraying the surface , or touch the feeding insects dead bacteria , but the sap sucking insects ( such as aphids , mites ) invalid, and avermectin mites killing effect is very good. Therefore, for different types of pests targeted selection of suitable varieties of bio-pesticides .

Two , according to the control object and conditions of the appropriate choice of bio- pesticide formulations of biological control effects often associated with pesticide formulations and is closely related to the use of technology , when used according to the control object , meteorological conditions and the use of time, the right to select the appropriate dosage forms , in order to achieve the best control effect. Such as powders can make use of air buoyancy and wind dispersed in a wider range , hand sprayers and thus have a greater exposure and pests ; For a large amount of leaf-eating pests such as Pieris water can be dubbed the WP suspension spray method was better than well, while the use of dusting method less effective. Capsules release the result is not only longer . Pathogens but also to protect them from environmental factors. Applicator can be used in greenhouses .

Third, based on different control objects determine the appropriate period of pest control is the role of biological pesticides object , for different types and characteristics of pests, biological pesticide use different methods. There are several different insect life, developmental stages , various developmental stages of different resistance to biocides . Therefore, understanding the developmental stage in which the pests , prevention and treatment is essential . For example, Pieris life can be divided into egg, larva, pupa and adult four developmental stages , egg in egg shells to protect , there pupa pupal stage protection, old larvae has a thick waxy layer of protection , while adults can winged flying. Therefore, only select young larvae make medicine. To give full play to the effect of biological pesticides .