论文部分内容阅读
连续自然接虫研究表明，长豇豆和丝瓜开花结实期美洲斑潜蝇产量损失与幼虫密度关系分别符合下列方程：Y＝－0．01138＋0．00035X（r＝0．9953）；Y＝－0．005527＋0．00061X（r＝0．9634）。根据当前价格和防治费用等因素，得出两种蔬菜在开花结实期的美洲斑潜蝇幼虫防治指标分别为百株884～1029头和1772～1945头。
The results of continuous natural moth studies showed that the relationship between the yield loss and larval density of L. asiaticus and L. mongolica at the flowering and fruiting stages of asparagus bean and loofah accord with the following equations: Y = -0.01138 + 0.00035X (r = 0.9953); Y = -0. 005527 + 0.00061X (r = 0.9634). According to the current price and the cost of prevention and control and other factors, two kinds of vegetables in the flowering and fruiting stages of the United States Liriomyza larvae control indicators were 100 strains of 884 ~ 1029 and 1772 ~ 1945 head.