3.Factors influencing population 1)Climate conditions >Prefer middle temperatures and high humidity; optimal temp.15-30C and RH+60%; >Precipitation and humidity would influence the overwintered larvae to pupate,adults to oviposit and eggs to hatch.At the same time,also influence the parasitoid wasp's population. >facultative diapause insect
1) Climate conditions ¾ Prefer middle temperatures and high humidity; optimal temp.15-30 ℃ and RH +60%; ¾ Precipitation and humidity would influence the overwintered larvae to pupate, adults to oviposit and eggs to hatch. At the same time, also influence the parasitoid wasp’s population. ¾ facultative diapause insect 3. Factors influencing population 3. Factors influencing population
3.Factors influencing population 2)Culture Prefer summer sowing to spring sowing; avoid mixture of both sowing seasons. 3)Natural enemy Over 70 predators and parasitoids found in China,such as pine caterpillar trichogrammatids,corn borer trichogrammatids and white muscardine fungi
2) Culture Prefer summer sowing to spring sowing; avoid mixture of both sowing seasons. 3) Natural enemy Over 70 predators and parasitoids found in China, such as pine caterpillar trichogrammatids, corn borer trichogrammatids and white muscardine fungi. 3. Factors influencing population 3. Factors influencing population
3.Factors influencing population 4)Host plants Adults prefer to choose plants sown early,that are growing well,with very green leaves to oviposit; Variety resistance:Corn contains certain substances,called anti--borertin(抗螟素)，resistant to insects.These include:anti-borertins A,B and C.Of which,anti-borertin A and anti-borertin C,called "Dimboa",are the most effective in resistance
4) Host plants Adults prefer to choose plants sown early, that are growing well, with very green leaves to oviposit; Variety resistance: Corn contains certain substances, called anti-borertin (抗螟素), resistant to insects. These include: anti-borertins A, B and C. Of which, anti-borertin A and anti-borertin C, called “Dimboa”, are the most effective in resistance. 3. Factors influencing population 3. Factors influencing population
Rice Stalk Borers Striped rice borer,Asian rice borer Chilo suppressalis(二化螟) ■Tryporyza incertulas(三化螟) Lepidoptera,Pyralidae
Striped rice borer, Asian rice borer Chilo suppressalis (二化螟) Tryporyza incertulas (三化螟) Lepidoptera, Pyralidae Rice Stalk Borers Rice Stalk Borers
卵块 成虫（左、中：g,右：8） Striped rice borer 幼虫（上：一代幼虫，下：越冬代幼虫】 Asian rice borer Chilo suppressalis (二化螟) 枯 被害状 (枯 被害
Striped rice borer Striped rice borer Asian rice borer Asian rice borer Chilo suppressalis suppressalis (二化螟 )