5.Environmental Factors l）Climate conditions Rainfall or soil humidity is the most important factor influencing population #
1) Climate conditions Rainfall or soil humidity is the most important factor influencing population #. 5. Environmental Factors 5. Environmental Factors
5.Environmental Factors 2)Varieties and developmental stages of wheat Generally,an obvious insect resistance is found in wheat varieties with long awns,abundant hairs, upright stems,densely-ranked spikelets and hard glumes.Conversely,it is in a contrary manner. More damage is caused when the wheat heading stage coincides with the adult stage of wheat blossom midge.If these stages do not coincide,only a slight injury appears. 一般地，芒长多刺、挺直、小穗排列紧密、颖壳厚、的品种具有明 显的抗虫性。 若小麦抽穗后尚未扬花前的时期与麦红吸浆虫成虫盛发期相吻合， 则受害重，反之受害就轻
2) Varieties and developmental stages of wheat Generally, an obvious insect resistance is found in wheat varieties with long awns, abundant hairs, upright stems, densely-ranked spikelets and hard glumes. Conversely, it is in a contrary manner. More damage is caused when the wheat heading stage coincides with the adult stage of wheat blossom midge. If these stages do not coincide, only a slight injury appears. 一般地，芒长多刺、挺直、小穗排列紧密、颖壳厚、的品种具有明 显的抗虫性。 若小麦抽穗后尚未扬花前的时期与麦红吸浆虫成虫盛发期相吻合， 则受害重，反之受害就轻。 5. Environmental Factors 5. Environmental Factors
5.Environmental Factors 3)Rotation and culture 4)Soil and topography 5)Natural enemies 宽腹姬小蜂：parasite rate75%or more; Predators:ants,spiders,ladybird beedles and insect-eating thrips,etc
3) Rotation and culture 4) Soil and topography 5) Natural enemies 宽腹姬小蜂: parasite rate 75% or more; : parasite rate 75% or more; Predators: ants, spiders, ladybird Predators: ants, spiders, ladybird beedles beedles and insect and insect-eating thrips, etc. 5. Environmental Factors 5. Environmental Factors
小麦吸浆虫 成家规律与控制 袁锋主编
Cotton Bollworm Oriental Tobacco Budworm Cotton Bollworm Helicoverpa armigera (called also棉实夜蛾)； Oriental Tobacco Budworm Helicoverpa assulta(烟青虫，called also烟夜蛾)； *Lepidoptera,Noctuidae
Cotton Bollworm Helicoverpa armigera (called also棉实夜蛾); Oriental Tobacco Budworm Helicoverpa assulta (烟青虫, called also烟夜蛾); Lepidoptera, Noctuidae Cotton Bollworm & Oriental Tobacco Budworm