寄主植物对土耳其斯坦叶螨实验种群生长发育及繁殖的影响

土耳其斯坦叶螨是新疆农作物生产的重大害虫(螨)之一,本文在室内条件下研究了其在大豆、四季豆、茄子、番茄和玉米等作物上的生长发育、繁殖等生命参数。结果表明,土耳其斯坦叶螨在玉米和番茄上不能完成生活史,在大豆、四季豆和茄子上实验种群内禀增长率(rm)和世代平均周期(T)分别为0.224 11、5.9 d,0.177 61、7.1 d,0.176 32、4.0 d。在其稳定年龄分布中,未成熟期分别占总量的86.842 8%8、2.500 8%和85.625 7%,对致死率为99%的不良环境的反应时间皆小于30 d。

Influence of host plants on development and reproduction of Tetranychus turkestani(Ugarove & Nikolski)

The strawberry spider mite,Tetranychus turkestani(Ugarove & Nikolski) is one of the most important insect pests in agricultural production of Xinjiang.The development and reproduction of T.turkestani feeding on soybeans,kidney beans,eggplants,tomatoes and corns were investigated in the laboratory.The results showed that the innate capacity for increase(rm)and mean generation time(T) for the mite on soybeans,kidney beans and eggplants were 0.224 1 and 15.9 days,0.177 6 and 17.1 days,and 0.176 3 and 24.0 days,respectively,but failed to finish whole life cycle on corns and tomatoes. When the age distribution of the experimental populations got into a stable period,the proportions of the immature individuals on the 3 host plants were 86.842 8%,82.500 8% and 85.625 7%,respectively.The reaction time of T.turkestani to the adverse environment that caused 99% mortality was less than 30 days on the three host plants.