论文部分内容阅读
寄生于大豆食心虫卵的赤眼蜂中,哪一种是优势种?在应用上哪一种赤眼蜂防治大豆食心虫的效果最好?为了弄清这些问题,我们自1978年以来进行了有关的研究工作,现把结果报导如下。 (一) 1978年8月16日大豆食心虫产卵初期,我们在环城等5个公社的150亩大豆田释放松毛虫赤眼蜂Trichogramma dendrolimi,每亩40,000头,设对照区。放蜂后每6天调查一次,结果列如表1。从表1看出,放蜂区大豆食心虫卵平均寄生率为
What kind of Trichogramma is the best way to control Siberian worm? In order to understand these problems, we have carried out some related researches since 1978 Research work, now the results reported below. (1) In the early days of laying eggs of soybean mealworms on August 16, 1978, Trichogramma dendrolimi (Trichogramma dendrolimi) was released in 150 mu of soybean fields in five communes such as the Ring City with a control area of 40,000 mu. After the bee was surveyed every 6 days, the results are listed in Table 1. As can be seen from Table 1, the average parasitism rate of soybean beetle eggs in the bee area is