甜菜夜蛾人工饲料及饲养技术研究

研究了人工继代繁殖甜菜夜蛾饲料配方及饲养方法 ,测定了各虫态发育历期、幼虫死亡率、化蛹率、羽化率、蛹畸形率及不同世代蛹重。采用改进的饲料配方饲养的深圳种群 ,第 2代幼虫死亡率、化蛹率、蛹畸形率、羽化率分别为 7 8% ,97 3 % ,2 7%和 93 8% ,第 2 ,5 ,9,1 2代平均单头蛹重分别为 1 1 9 7± 1 6 1 ,98 3± 1 1 4,94 3± 1 2 6和 82 4± 9 6mg,平均单雌产卵量分别为 1 1 3 7 2± 63 3 ,684 5± 5 3 7,45 6 9± 40 2和 3 91 7± 45 6粒。人工饲养的甜菜夜蛾 ,卵、幼虫、蛹、雌性成虫的发育历期分别为 2 5～3 5 ,1 0～ 1 2 5 ,7～ 8 5和 8～ 1 4天 ,完成一个世代需要 2 1～ 2 5天。

The artificial diet and the mass rearing method of Spodoptera exigua

An artificial diet of beet armyworm Spodoptera exigua mainly consisted of soybeen, maize, wheat and yeast, was used for continuous mass rearing. The studies showed that the mean of larvae mortality, rate of pupation, malformed pupae and adult emergency were 7 8%, 97 3%, 2 7% and 93 8% respectively. The single pupal weight of the 2nd, 5th, 9th and 12th generation on the average was 119 7±16 1,98 3±11 4,94 3±12 6 and 82 4±9 6 mg, and the number of each adult female laid was 1 137 2±63 3, 684 5±53 7, 456 9±40 2 and 391 7±45 6 eggs respectively. The development period of eggs, larvae, pupae and female adults each separately ranged from 2 5～3 5d, 10～12 5d, 7～8 5d and 8～14d, and the generation lasted 21～25d.