生物因子对小菜蛾种群的联合作用模拟
SIMULATION OF THE COMPLEMENTARY EFFECT OF THE BIOLOGICAL AGENTS ON DIAMOND BACK MOTH
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摘要: 应用适应于种群动态控制的状态空间分析法，通过生命表参数模拟小菜蛾种群数量动态，通过输入不同的生物因子对小菜蛾种群动态控制的作用，研究这些生物因子的组合对小菜蛾种群动态的控制。模拟结果表明，施用小菜蛾颗粒体病毒与散放赤眼蜂和施用苏云金杆菌组合应用，在种群趋势比较高的情况下也可能控制小菜蛾种群数量的增长。Abstract: By means of state-space population model, the population dynamics and population control of Diamondback Moth(DBM) Plutella xylostella (L.) was simulated by adding the biological agents. In the vegetable field,by releasing Trichogramma( Trichogramma confusum Viggiani(= T. chilonis, Nagaraja,nec. Ishii), or spraying DBM granulosis virus(PxGV), or spraying Bacillus thuringiensis(B.t.), the indeces of population control( IIPC ) of DBM decreased in 0.2, 0.24, and 0.29 against the control respectively, but the index of population trend of DBM in control was as high as 29.3, the population of DBM still increased by control each one of the biological agents. In the field of spraying B.t. and releasing Trichogramma showed the complementary effect. In the field releasing Trichogramma, spraying PxGV and B.t. the population dynamics of DBM were simulated. The results showed that the DBM population were decreased in a low level even in the high index of population trend in control(table 2).
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