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直纹稻弄蝶(Parnara guttata Bremeret Greg),通称稻苞虫,是陕南稻区的主要害虫。我们于1981—1984年对其危害及化学防治指标,进行了调查研究。 (一)田间幼虫的数量与水稻产量损失的
Parnara guttata Bremeret Greg, commonly known as the rice shellworm, is the major pest in the southern Shaanxi rice area. From 1981 to 1984, we conducted a survey on its hazards and chemical control indicators. (A) The number of field larvae and the loss of rice yield