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肥沃耕地和森林土壤是微生物良好的生存环境,土壤中微生物的种类和数量都极为丰富,许多对人类有用的微生物菌株都是从土壤中分离筛选出来的.虽然昆虫病毒不能在土壤中生长繁趋,但是它在土壤里相当稳定,土壤是其良好的夭然贮库,对昆虫病毒病的流行起着极为重要的作用.Tisntey(1979)指出:在撒喷或自然疾病暴发后,保持在土壤中的病毒,不仅是引起以后各代害虫自然流行病的重要病毒源,而且是能够维持病毒产生长期影响的作用物.据报
Fertile and forest soil is a good living environment for microorganisms, the species and quantity of microorganisms in the soil are extremely rich, and many human strains of microorganisms are isolated and screened out from the soil.Although insects virus can not grow in soil frequently , But it is fairly stable in the soil and soil is a good natural depot that plays an extremely important role in the epidemic of insect viruses, and Tisntey (1979) points out that after spattering or a natural disease outbreak, it remains in the soil Is not only an important source of virus that causes natural epidemics of pests and generations of later generations, but also an agent that can sustain the long-term effects of the virus.