食虫齿爪盲蝽对枸杞木虱的捕食作用研究

在室内研究了捕食性天敌食虫齿爪盲蝽成虫对枸杞木虱2龄若虫的捕食作用。结果表明,食虫齿爪盲蝽对枸杞木虱的捕食功能反应符合HollingⅡ型反应,拟合的圆盘方程为Na=0.964 9N/(1+0.313N)。捕食木虱数量随木虱密度增加而增大,但寻找效应随之而降低。食虫齿爪盲蝽对自身密度的功能反应用Watt模型拟合为A=43.089 0P-0.780 5,其捕食作用率与个体间相互干扰作用的关系用Hassell-Varley的干扰反应模型拟合为E=0.5394P-0.378 7,饥饿48 h的食虫齿爪盲蝽的捕食速度与时间段关系的数学模型为V=2.128 1x-1.007 2。

Studies on predation of Deraeocoris punctulatus on Paratrioza sinica

The predation of adult Deraeocoris punctulatus Fallen on second instars of Paratrioza sinica Yang &; Li was studied in laboratory. The results showed that the functional response of adults of D. punctulatus to second instars of P. sinica was fitted to Holling Ⅱ|type equation and the equation was Na=0.964 9 N/(1+0.313N). The relationship between the quantity of P. sinica preyed by D. punctulatus and the density of P. sinica could be represented by a negative accelerative curve. The searching efficiency decreased with the increase of P. sinica density. The functional response of adult D. punctulatus to the density of itself could be fitted by the Watt model, A=43.089 0P -0.780 5. The relationship between predation efficiency and individual interference could be fitted by the Hassell and Varley model E=0.539 4P-0.378 7. When they were starved for 48 hours, the relationship between predation rate of adult D. punctulatus and time could be described as V=2.128 1 x-1.007 2.