| The biological characteristics were studied on breeding Campoletis chlorideae Uchida which provide base for factory production, releasing of field, and deeply studying relationship between pest and natural enemy. The mainly results are as follows: 1.Biology 1.1 The day age of parasitoid, temperature and intensity affected matingMale played dominate role in mating, who would twitter antenna and flaping wing as soon as found female, till successfully mating. It took 28.63 ±6.90 s (N=33) for whole response, and 162.45±9.40 s (N= 33) for mating. Male could have another mating response, but female only mate one in whole life.Among male of 24h, 36h old, about 81.25% could mate successfully, which is the highest rate of success, the ratio of success would decrease with Chlorideae Uchida growing older. The lowest rate of successful mating of 12h older was 13.33%, the successful mating ratio would increase, as it grew older, it would reach 100% at 36h. However, there was no significant difference among different day-old of females after 46h.If temperature was controlled between 10℃and 30℃, successfully mating ratio would increase with the temperature growing higher . Campoletis chlorideae Uchida couldn't mate when light intensity was zero. When intensity reached 1500 LUX the ratio reached the highest 85.43%, then the successful mating ratio would decrease with the increasing of intensity. 1.2 The effects of different generation, the day age of female and mating pattern on the sex ration of Chlorideae Uchida offspring were evaluated in lab.The wasp must be revived after reared for conservative 4 generations. The offspring shared different sex rations, when the different day age females were compared. Close breading was one of the reasons, which cause male bias of the wasp's offspring. Parthenogenesis gives only male baby wasp, and when this kind of male wasps matedwith females the numbers of male babies are increased in their offspring.Thus, in C. chlorideae breading experiments, both mated female individuals and non- close breading behavior are the main methods for keeping the sex ratio of the wasp offspring nearly 1:1.In addition, the sex ratio has no significant difference between C. chlorideae feed on different host pest and C. chlorideae feed on different day-old larvae of P. litura1.3 Though the quantity of laying egg of female whit different mating style was different, dailies' dynamics implied parabola.The average quantity of laying egg of C. chlorideae 92.7 ?17.1 (N=l2 ) at 26?C after mating. Dailies' dynamics implied parabola. It was low on the first day, it would reach top on the sixth day, and average quantity of laying egg was 16.1. Female could laying egg without mating, but all offsprings were male, average quantity in whole life was 37.2.1.4 C. chlorideae has different growth periods when they have different host, in the meanwhile, the host who was parasited developed significantly slow.In the lab, C. chlorideae could parasite Helicoverpa armigera(Hubner) Helicoverpa asslta Guenee, Spodoptera litura Fabricius successfully. The developing period of C. chlorideae parasiting H. armigera was 14.22?.58 d, which significantly shorter than that of P. litura 15.56?.49d. Weight of Cocoon of H. armigera, and P. litura were respectively 114.9?6.2 and 115.43?7.4 mg, which had no significant difference.P. litura who were parasited grew very slow. Increasing quantity of weight had significant decrease on the first day, only 47.63% of CK's till the fifth day, hardly ate anything at the sixth day or seventh day. The P. litura larvas were highly parasited when their weight between 2mg and 6mg, having no parasited ability at 50mg.1.5 The weight of parasitoid, temperature affected age, intensity affect parasitoid eclosionMainly parasitoid could eclosion till 94.3% (N=385) in illumination, only 54.0% at a.m.4.Among temperature 4-26℃, the age of parasitoid about 23.5d, which is the highest, the age of parasitoid would decrease with temperature grew higher. The downiest age of pa...
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