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通过对1997～2011年东台市稻纵卷叶螟各代测报资料的整理、水稻苗情分析及六(4)代稻纵卷叶螟迟发年份的发生特点、滞留比例的重点解剖,结合水稻不同生育阶段纵卷叶螟卵、虫自然存活情况,研究判定出六(4)代稻纵卷叶螟初孵幼虫适宜取食生存的临界水稻生育期在水稻破口后20 d左右。稻纵卷叶螟适生临界期的判定,有利提高预测预报的准确性,增强防治技术指导的科学性。
Based on the survey data of rice leaf roller of Dongtai city from 1997 to 2011, the analysis of rice seedling condition and the occurrence characteristics of rice leafroller larvae of late generation of six (4) generations, focusing on the retention ratio, In the different stages of growth, the natural survival of eggs and insects of the leaf roller was studied. It was found that the critical growth period of six (4) generations of newly hatched larvae was suitable for feeding and survival. The determination of the critical stage of the rice leaf roller is suitable for improving the accuracy of forecasting and forecasting and enhancing the scientific and technical guidance.