Biological pesticides have many benefits, so how to use them well?

Biological pesticide is a common pesticide in the process of crop planting. Compared with traditional pesticides, biological pesticides are more environmentally friendly and have better effects, so they are loved by everyone. Many people don't know about biological pesticides. This paper will introduce the advantages and common problems of biological pesticides in detail.

The advantage of applying biological pesticides is 1, which is safer for people and animals. Most biological pesticides are slightly toxic or slightly toxic, so it is not easy to cause harm to users.

2, more conducive to the quality of agricultural products. Biological pesticides are very soluble and not easy to pollute agricultural products. The quality and safety of the agricultural products produced are guaranteed.

3. The air pollution is small, which is generally safe for Nemesis. The vast majority of biological pesticides are highly selective, only reasonable for pest control, harmless to bees, birds, fish and frogs, and very easy to dissolve, and then return to nature after use.

4. Strong selectivity and relatively single control object. Viral infection, sex attractants and other pesticides only have an effect on the corresponding diseases. For example, the infection of Spodoptera exigua heteroploid polyhedrosis virus can only control Spodoptera exigua, and the infection of Spodoptera litura heteroploid polyhedrosis virus can only control Spodoptera litura.

5, it is not easy to form drug resistance. Mineral-derived pesticides, green plant-derived pesticides and cell-biological pesticides use natural chemicals to prevent and treat diseases, just like Chinese herbal medicines to prevent and treat physical diseases, which are more "treating both the symptoms and the root causes" and are not easy to form drug resistance, which is as reasonable as years of application.

Common problems in the application of biological pesticides 1, master the temperature. When spraying biological pesticides, try to control the dream temperature above 20℃. The mystery is that the active ingredients of this pesticide are composed of protein crystals and live spores. Once sprayed at a temperature lower than the above temperature, the reproduction speed of spores in pests is very slow, and it is difficult for protein crystals to give full play to their efficacy, which is generally uncontrollable after application. According to the experimental data, in the standard temperature range of 25-30℃, the efficacy after spraying is 2 times higher than that in the range of 10- 15℃.

Don't use it in dry weather. Biological pesticides are also extremely sensitive to temperature. The greater the relative humidity of the air, the more obvious the efficacy of spraying biological products pesticides, especially for powdery biological products pesticides.

3. Avoid natural light. Ultraviolet rays in natural light have a serious destructive effect on spores. Scientific experiments show that spores will be killed by 50% in one fell swoop after 30 minutes of sunlight irradiation, and the spore mortality rate will reach 80% after direct irradiation 1 hour. Therefore, the spraying time is in rainy days or after 4 pm.

4, the application is afraid of heavy rain washing. Spores are afraid of being washed away by heavy rain and should be carried out according to the weather forecast. Because of the heavy rain, the sprayed bacterial liquid will be washed away and lose its destructive power.

5. Avoid mixing with pesticides and fungicides.