蝇蛆提高对虾抗杆状病毒感染能力的初步研究

室内试验表明，投饲蝇蛆起始时间至少需在病毒侵袭前10d，对对虾起始死亡时间和50％，90％死亡时间才有明显的延缓，分别较对照组延长1．76，3．04，4．1倍；蝇蛆可以显著提高对虾的抗杆状病毒感染能力，激活对虾的酚氧化酶系统。田间试验表明，投喂有蝇蛆的虾池，存在时间平均为64d，不投喂蝇蛆的对虾，存活时间平均为33.5d。1993年投喂蝇蛆的虾池平均每天死虾数小于存池量的0．023％，1994年平均每天死虾数占存池数的0．015％，经PCR检测证实，1993，1994年对虾中杆状病毒病变的个体仅占1．15％。

Preliminary study on shrimp''''s capacity of anti-baculovirus infection induced by housefly larva

The results of artificially infection in lab showed that initial death time, 50% and 90% death time of shrimp was prolonged 1.76, 3.04 and 4.1 times respectively when the shrimp were fed with housefly larva at least 10 days before infected with baculovirus compared with the control group. Housefly larva could significantly improve the capacity of shrimp against baculovirus and activate the prophenoxidase system of shrimp. Field experiment showed that the survival time of shrimp fed with housefly larva was 64 days in average and that of control group was 33.5 days. The percentage of dead shrimp per day in the tested group was less than 0.023% in 1993 and 0.015% in 1994. The percentage of shrimp infected with baculovirus was only 1.15% in 1993 and 1994.