Optimization On Mass-rearing Of Diachasmimorpha Longicaudata (Ashmead)

In order to further optimize the feeding method of Diachasmimorpha longicaudata and increase its yield,this paper studied the effects of rearing density on the survival rate of Diachasmimorpha longicaudata,the emergence rate of the offspring,and the reproduction rate of single female,as well as the influence of four different ovigerous disks on the emergence rate and parasitism rate of Diachasmimorpha longicaudata.1.Using three different sizes of insect cages,15 cm × 15 cm × 15 cm,25cm × 25 cm × 25 cm,50cm × 50 cm × 50 cm,to raise Diachasmimorpha longicaudata.Three-quantity gradient is set to provide the host of the third instar larvae of Bactrocera dorsalis,detecting the reproduction rate of single female,emergence rate and survival rate respectively.The results show that the optimal breeding of Diachasmimorpha longicaudata in 15cm×15cm×15cm,25cm×25cm×25cm,50cm×50cm×50cm,is 200pairs/cage,700 pairs/cage,and 3000 pairs/cage of parasitic wasps.The relationship between the total volume of the insect cage(x)and the optimal breeding(y)is in accordance with y=0.023x+131.41,and relationship between the total area of the insect cage(x)and the optimal breeding(y)is in accordance with y=0.2105x-176.81.2.Four different types of ovigerous disks,including ovigerous bags,double-sided ovigerous disks,single-sided ovigerous disks and spherical ovipositors,are parasitized in 25 cm × 25 cm × 25 cm size insect cages,respectively detecting parasitism rate,emergence rate and progeny rate.It shows that the parasitism rate and progeny rate in the ovigerous bags are significantly higher,0.583 and 1.156 respectively.Thus,ovigerous bag is the most suitable for the 25cm×25cm×25cm size insect cage in the four ovigerous disks.