紫茎泽兰乙醇提取物对棉铃虫生长发育和繁殖力的影响

采用室内生物测定法研究了紫茎泽兰Eupatorium adenophorum Spreng乙醇提取物对棉铃虫Helicoverpa armigera (Hübner)生长发育和繁殖力的影响。结果表明，当给棉铃虫幼虫饲喂含紫茎泽兰提取物浓度分别为0.088、0.44、2.2和11 g/kg的饲料时，棉铃虫的死亡率显著高于对照，而羽化率和蛹重均显著低于对照（P≤0.05）。在棉铃虫成虫产卵实验中，0.08、0.4和2 g/L紫茎泽兰提取物对产卵有一定引诱作用，而10 g/L则对产卵有驱避作用。取食浓度分别为0.08、0.4、2和10 g/L紫茎泽兰提取物的棉铃虫卵孵化率降低。表明取食紫茎泽兰提取物对棉铃虫的生长发育和繁殖有明显不利影响。

Effect of ethanol extract of Eupatorium adenophorum Spreng on growth,development and reproduction of the cotton bollworm,Helicoverpa armigera (Hübner)

The effect of ethanol extract of Eupatorium adenophorum Spreng on growth, development and reproduction of the cotton bollworm, Helicoverpa armigera (Hübner), was bioassayed in the laboratory. The results showed that the mortality rate of H. armigera larvae was significantly higher while pupa weight and adult emergence were significantly lower than the control when the larvae fed on the diet containing the extract of E. adenophorum at the concentrations of 0.088，0.44，2.2 and 11 g/kg. Treatments with the extract at the concentrations of 0.08, 0.4 and 2 g/L showed attraction effect on the oviposition of the bollworm females, however, the extract treatment at the concentration of 10 g/L showed the repellent effect on the oviposition of the bollworm females. Egg hatching success of cotton bollworm in all treatments of the extract decreased significantly compared with the control. The results suggest that feeding the extract of E. adenophorum may obviously retard growth and reproduction of the cotton bollworm.