2018年我国黏虫发生特点分析

2018年,二代黏虫在我国东北、华北、黄淮、西北、西南地区普遍发生,内蒙古、辽宁、陕西、山西、宁夏、四川出现高密度为害田块;三代黏虫主要在东北、华北和黄淮地区,黑龙江、辽宁、内蒙古、河北、天津、陕西、山东和宁夏等地发生严重,虫口密度高。在二、三代发生区,玉米、小麦、谷子、水稻等多种作物受害较重。本文总结了2018年黏虫各代次的发生特点,分析了关键时期天气条件、高空气流、田间生态和防控措施等因素对黏虫发生的影响,以期为今后的监测和防控提供参考依据。

Analysis on occurrence characteristics of Mythimna separata (Walker) in 2018

The 2nd generation larvae of Mythimna separata occurred widely in northeast, north, Huang huai hai regions, northwest and southwest of China and serious damage was found in part of Inner Mongolia, Liaoning, Shaanxi, Shanxi, Ningxia and Sichuan provinces. The 3rd generation larvae of armyworm occurred seriously in northeast, north, and Huang huai hai regions, and seriously damage was found in part of Heilongjiang, Liaoning Inner Mongolia, Hebei, Tianjin, Shaanxi, Ningxia and Shandong provinces. Among the occurrence area of 2nd generation and 3rd generation, M.separata with high population density result in serious damages on many crops such as maize, wheat, millet and rice. This paper summarizes the occurrence characteristics of M.separata in 2018 and analyzes the related factor such as distribution of rainfall, upper air flow, field ecology and control measures. This paper will provide reference for monitoring and forecasting of M.separata in the future.