摘要
研究虫酰肼对甜菜夜蛾汰选种群生长发育及生殖的影响。结果显示:经虫酰肼处理后,甜菜夜蛾SS种群和RR种群卵的孵化抑制中浓度分别为179.38和160.71mg/kg,孵化幼虫的存活抑制中浓度分别为18.64和30.53mg/kg,虫酰肼对甜菜夜蛾卵的孵化率影响较小,而对孵化后幼虫的存活率影响较大。处理初孵幼虫6d后,2种群幼虫存活率及化蛹率随处理浓度的增加而降低,幼虫历期最高饲毒浓度与最低饲毒浓度相比分别延长了2.71d和6.19d,同一浓度下,RR种群幼虫历期比SS种群缩短了0.94～2.59d。处理甜菜夜蛾3龄幼虫12h后,随虫酰肼浓度的增加,2种群化蛹率逐渐降低,雌雄蛹重均有递减的趋势,雌蛹比例随浓度的增加变化较小,但SS种群雌蛹比例≤50.00%,而RR种群雌蛹比例≥50.00%,雌雄成虫羽化率总体上依次递减,处理浓度大于1.00mg/kg时虫酰肼对甜菜夜蛾成虫羽化的影响较大。
Effect of tebufenozide on growth and fecundity of the selected strain of Spodoptera exigua （Hubner） were studied. The results showed that the hatching IC50 of SS and RR strains was 179.38 and 160.71 mg/kg, respectively, and larval survival IC50 was 18.64 and 30.53 mg/kg, respectively. The influence of tebufenozide on egg hatching rate was less, while that on the larval survival rate was greater. After newly emerged larvae （1 st instar） were treated with tebufenozide in 6 days, the larval survival rate and pupation rate decreased with the increasing of tebufenozide. The larva developmental duration increased 2.71 and 6.19 d respectively, when treated with highest and lowest of tebufenozide. Treated with same concentration, it decreased 0.94 - 2.59 d in RR strain than that in SS strain. When the 3rd instar larvae were treated with tebufenozide for 12 h in the two strains, the pupation rate and the average pupa weight decreased with the increasing of tebufenozide. The proportion of female pupae varied slightly, in which it was below 50% in SS strain while above 50% in RR strain. The emergence rate tended to decrease and the influence was greater when the treatment concentration was higher than 1.00 mg/kg.
出处
《昆虫知识》
CSCD
北大核心
2009年第3期415-419,共5页
Entomological Knowledge
基金
2008年公益性行业(农业)科研专项经费资助(200803007)
关键词
虫酰肼
甜菜夜蛾
汰选种群
生长发育
生殖
tebufenozide, Spodoptera exigua, selected strain, growth, fecundity
