摘要
本文通过对华北地区有代表性的作物生境，采用人工挂卵的方法，系统调查研究了玉米螟赤眼蜂在１７种生境中的分布和种群动态。结果表明，玉米螟赤眼蜂在不同生境中的分布、发生时间和种群数量有所不同，说明其对生境有一定的选择性。玉米螟赤眼蜂自然种群消长有４个峰，其中以春甘薯田的发生时间最长，种群数量最大，最具代表性。这４个峰在春高粱间作菜豆、春花生、平作夏玉米和夏玉米间作直立型绿豆这４种生境中也不同程度地出现。间作豆科作物可在一定程度上提高玉米螟赤眼蜂的寄生率。玉米螟赤眼蜂种群数量年度间变异较大，特别是干旱的影响最为明显。
Distribution and population dynamics of Trichogramma ostriniae Pang et Chen in 17 crop habitats were studied by checking the parasitic rate of egg masses of mass reared Asian corn borer, Ostrinia furnacalis (Guenée). The newly laid egg masses (less than 12h) on waxy paper were placed in plant leaves and taken back in the 3rd day afternoon to check the parastic rates. Results showed that the distribution, occurring time and the population of T. ostriniae varied in different habitats. It means that T. ostriniae has certain preference for particular habitats. The population of T. ostriniae was the biggest and longest occurring period with 4 typical peaks in spring sweet potato field, which were also observed in other habitats such as spring sorghum interplanted with kidney bean or spring peanut, summer corn alone and summer corn interplanted with erecting type mungbean at various levels. Crops interplanted with legumens can slightly increase the parasitic rate of O. furnacalis egg masses by T. ostriniae. The population size of T. ostriniae varied in different years and affected by drought, especially.
出处
《中国生物防治》
CSCD
1997年第1期1-5,共5页
Chinese Journal of Biological Control
关键词
玉米暝
赤眼蜂
生境
分布
种群消长
richogramma ostriniae habitat distribution population dynamics
