宁夏苜蓿主要害虫田间消长规律的初步研究

Preliminary Study on Law of Field Growth and Decline of Alfalfa Major Insects in Ningxia

根据在宁夏3个生态区设调查点对苜蓿主要害虫进行系统调查的结果,初步分析了苜蓿主要害虫蚜虫、蓟马、草地螟、盲蝽的田间消长规律,明确了宁夏苜蓿主要害虫的种群变化、发生高峰期及危害程度,为今后的预测预报和防治技术研究奠定了基础。

Major alfalfa insects were systematically investigated in three survey sites where can represent three main biological areas of Ningxia. Acording to the investigation results, the law of field growth and decline of alfalfa aphids, thrips, grass moth, bugs and leaf miner in different biological areas of Ningxia was preliminarily analysed. It was clear about population change, the Severe occurrence period and harmfulness of alfalfa major insects in Ningxia. It will make an important basis for forecast and control of alfalfa insects.