摘要
吡虫啉对蚕的毒性试验表明 :4龄起蚕致死中浓度 (LC50 )为 2 71mg/L ,致死中量 (LD50 )为0 0 3 4 μg/头。 4龄起蚕连续添食吡虫啉水溶液试验表明 :0 0 0 71mg/mL( 1 4× 1 0 4 倍稀释液 )浓度吡虫啉连续添毒对蚕有明显的毒性 ,茧的经济性状也有显著地下降。 0 0 1 2 5mg/mL( 8× 1 0 4 倍稀释液 )吡虫啉连续添毒 1 2h的蚕 ,上蔟率为 86%,死笼茧率为 3 9%,鲜茧茧层率为 2 1 2 %,比对照区低 0 3 %,而持续添毒则表现为全部死亡。此外 。
The tests of toxicity of imidacloprid to silkworm larvae showed that 50% lethal concentration(LC 50 ) was 2.71 mg/L and 50% lethal dose(LD 50 ) was 0.034μg/larval of 4th newly exuviated larvae.The experiment of continual imidacloprid administration indicated:continual feeding with 0.0071mg/mL (14×10 4 times diluted aqueous) showed clear toxicity and there was marked decline in economic character of cocoon.Continual feeding with 0.0125 mg/mL (8×10 4 times diluted aqueous) for 12 hours,the cocooning ratio was 86%,ratio of dead worm in cocoon was 3.9%, and ratio of fresh cocoon shell was 21 2% which is 0.3% low than the control plot.But all the silkworm larvae died in continual imidacloprid feeding plot.In addition, it has toxicity of contact and fumingation to silkworm larvae.
出处
《蚕业科学》
CAS
CSCD
2000年第2期81-86,共6页
ACTA SERICOLOGICA SINICA
