豆野螟对寄主的选择性及豇豆品种抗螟眭比较

研究了豆野螟(Maruca testulalisGeyer)对豇豆、扁豆、普通菜豆3种寄主植物的选择性,以及30个豇豆品种对豆野螟的抗性。结果表明普通菜豆的花与荚的虫量均为零,豆野螟对普通菜豆表现出明显的不选择性,对豇豆和扁豆表现出明显的嗜食性,但对扁豆则更偏食,扁豆与豇豆在豆荚中的幼虫虫量存在极显著差异。豇豆不同品种的抗螟性也存在一定差异,高产4号等5个品种较为感虫,而云优油青、惠丰8号、8月冬求3个品种对豆野螟有较高的抗性且与其他品种存在极显著差异。

Studies on the selectivity of Maruca testulalis for host plants and comparison of the insect-resistance of different cowpea varieties

The selectivity of Maruca testulalis Geyer for three host plants and the resistance of thirty different cowpea varieties to M.testulalis were studied.The results showed that M.testulalis had non-preference to bean but preference to cowpea and hyacinth bean.There were significant differences in larvae quantities in bean pods between hyacinth bean and cowpea.The resistance of different cowpea varieties to M.testulalis was also different.Gaochan 4 among others was more susceptible,but Yunyouyouqing,Huifeng8 and Bayuedongqiu had a higher insect-resistance than other varieties,and were distinctly different from the other varieties.