本文系作者在云南农田草害调查的基础上整理而成,概述主要作物田间危害性大的杂草种类以及对作物产量的损失额,分两挡次提出我省的40种防除对象,提出防除策略及近年需要的除草剂种类和数量,供制定生产规划参考。一、农田杂草的危害 1.主要防除对象根据田间调查结果,将各类作物及其耕作类型田间的杂草,选危害指数高的分四挡归类(女仁I表1)。表1云南主 Based on the investigation of farmland grassland damage in Yunnan, this paper summarizes the types of weeds that are harmful to the main crop fields and the amount of losses to crop yield, and puts forward 40 kinds of prevention and control targets in our province in two stages, Strategies and types and quantities of herbicides needed in recent years for the formulation of production planning reference. First, the hazards of farmland weeds 1. The main object of control According to the field survey results, all types of crops and their tillage fields weeds, the selection of high hazard index divided into four blocks (female I Table 1). Table 1 Yunnan main