淡剑纹灰翅夜蛾实验种群生命表  

Experimental Population Life Tables of Spodoptera depravata

作　　者：黄东林[1] 许慧卿[1] 

机构地区：[1]扬州大学农学院植物保护系,江苏扬州225009

出　　处：《江苏农业学报》2004年第3期164-168,共5页Jiangsu Journal of Agricultural Sciences

基　　金：扬州大学基金项目(MK0113216)

摘　　要：　通过室内饲养淡剑纹灰翅夜蛾[Spodopteradepravata(Bulter)],探索实验种群生命表。结果表明:淡剑纹灰翅夜蛾室内第一代发生时间为7月中旬至8月中旬,第二代发生时间为8月中旬至9月中旬;第一代幼虫期、蛹期分别为18 66d和7 27d,第二代幼虫期、蛹期分别比第一代延长7 66%和41 68%,两代幼虫期和蛹期都呈极显著差异;第一代世代存活率为53 21%、单雌平均产卵量276 28粒、世代净增长率为74 3836、内禀增长率为0 1391、周限增长率为1 1492,第二代比第一代分别降低了21 01%、17 39%、33 40%、24 16%和3 30%;第一代世代平均周期为31 2227d,种群加倍时间为4 9831,第二代比第一代分别增加了19 52%和31 85%;淡剑纹灰翅夜蛾取食黑麦草的世代存活率和繁殖力都很高,不同世代种群增长参数差异明显;淡剑纹灰翅夜蛾卵期及1龄、2龄幼虫死亡率较高,是防治的最佳时期。Based on the rearing data of lab colony of Spodoptera depravata experimental population life tables of the pest were constructed.The results showed that the first generation occurred in mid-July to mid-August and the second in mid-August to mid-September.The larval and pupal stages of the first generation lasted 18.66 and 7.27 days,while those of the second generation were 7.66% and 41.68% longer than the first generation respectively,which differed significantly between the two generations.The survival rate,average fecundity,net reproductive rate(Ro),intrinsic increase rate(rm) and finite increase rate(λ) of the first generation were 53.21%,276.28,74.383 6,0.139 1 and 1.149 2 respectively,and those of the second generation were decreased by 21.01%,17.39% ,33.40%,24.16% and 3.30%,respectively.The mean generation time(T) and the doubling time (DT) of the first generation were 31.222 7 days and 4.983 1,while those of the second generation were 19.52% and 31.85% longer than the first generation,respectively.The data observed in the laboratory showed that survival rate and fecundity of Spodoptera depravata reared on ryegrass were higher.Difference of parameters of the population increase in different generations was significant.The egg stage and the younger star larval stages were the best to control this insect for its high mortality.

关 键 词：淡剑纹灰翅夜蛾 实验种群生命表 草坪害虫 发育速率 种群存活率 种群生殖力 

分 类 号：S436.8[农业科学—农业昆虫与害虫防治]