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粘虫发生趋势预测今年1代粘虫在江淮和黄淮麦区发生面积大,局部区域虫量高,经有效防治后各地残虫密度普遍较低。结合天气条件和作物种植情况,预计今年2代粘虫总体为中等发生,山西大部、山东东部、内蒙古东北部、辽宁中西部、吉林西南部、黑龙江中南部等局部地区有重发可能,雨水丰沛地区管理粗放、低洼田块可出现高密度虫量集中危害现象;预计全国发生面积约为5000万亩,幼虫发生危害盛期在6月中旬末至7月中旬。
The occurrence trend of armyworm occurrence The first generation of armyworms in Jianghuai and Huanghuai wheat area occurred in large area, the local area of insect population is high, after the effective prevention and control around the generally low density of the soil. According to the weather conditions and planting conditions, the second generation armyworms are expected to occur moderately this year with the possibility of recurrence in some areas such as most of Shanxi, eastern Shandong, northeastern Inner Mongolia, central and western Liaoning, southwestern Jilin, central south of Heilongjiang, Extensive management of abundant areas, high-density low-lying plots may be the concentration of harmful insects; is expected to occur throughout the country with an area of about 50 million mu, larvae risk peak in mid-June to mid-July.