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大豆根蛇潜蝇Ophiomyia shibatsuji(Ka-to)(图1)主要为害大豆使大豆减产。据对黑龙江垦区35个农场调查,大豆受害率达20—100％,平均40％左右。为了解决这个问题,从1975年以来,我们对此虫作了一些观察,现将材料整理如下,以供进一步研究参考。开始化蛹。 (一)成虫田间消长 在轮茬地(从5月25日至6月20日止)每天下午4—5时,在固定地点内调查两垄间成虫量,结果如图2。 (二)发生历期 观察成虫20只,寿命最短2天,最长14天。据3对成虫所产的卵20
Soybean root snake, Ophiomyia shibatsuji (Ka-to) (Figure 1) The main damage to soybeans soya yield. According to a survey of 35 farms in Heilongjiang reclamation area, soybean victimization rate reached 20-100%, with an average of about 40%. In order to solve this problem, we have made some observations on this pest since 1975, and the materials are now compiled as follows for further reference. Start pupation. (1) Growth and Decline of Adult Pest The amount of adult worms in the two dwellings at fixed locations was investigated daily at 4-5 pm on the stubble field (from May 25 to June 20). The results are shown in Figure 2. (B) occurred during the observation of adults 20, the shortest life of 2 days, up to 14 days. According to 3 pairs of adult eggs 20