《Table 3 Parasitism situation of Trichogramma japonicum released at different times in Cnaphalocroci

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《稻螟赤眼蜂生物防治水稻主要害虫的研究（英文）》

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As shown in Table 3，7~15 d after releasing the Trichogramma japonicum，the average parasitism rate of Trichogramma japonicum on the Cnaphalocrocis medinalis eggs was 57.1%.On May 20th，June 18th，August 10th and September 12th，the Trichogramma japonicumparasitism rate of the Cnaphalocrocis medinalis egg cardwas 56.8%，72.1%，65.8%and33.8%，respectively.The effects of Trichogramma japonicum release in different periods on the T.japonicum parasitism in eggs of Cnaphalocrocis medinalis were significant，which was related mainly to the migratory habits of the Cnaphalocrocis medinalis，and possibly to the environmental factors such as air temperature and wind speed.