湘北地区棉花主要病虫害发生规律研究

湘北地区棉花主要病虫害发生规律研究(毕业论文9570字)
  摘 要：近几年，湖南湘北地区棉花病虫害肆虐，导致棉花的减产日益严重，棉花病虫害防治已成为湘北地区农业防治的重中之重，所以对湘北地区的棉花主要病虫害发生动态的研究具有很高的应用价值和经济价值。本文对棉花主要病虫害的发生趋势进行初步的研究，通过一些常用的调查方法对病虫害发生程度做评估并与近几年发生动态作比较，以及探讨了病虫害的防治方法。
  关键词：棉花虫害，棉花病害，病虫害发生动态，发生程度评估

Dynamics of major pests of cotton in north area of Hunan province
  Abstract: In recent years, cotton pest has becoming in north area of Hunan province, resulting in cotton cut across increasingly serious. Cotton plant diseases and insect pest control in north area region has become the most important of the prevention of agriculture, so the dynamic study of most major diseases and insect pests occurrence of cotton in north area region has high application value and economic value. This paper mainly statements the occurrence of cotton plant diseases and insect pests, carrying on the preliminary research trend on the basis of commonly used survey in recent years, and comparing and undergoing dynamic assessment and discussing the prevention and cure of diseases and pests. 
  Keyword: Cotton pest, Cotton diseases, Diseases and insect pests occurrence trends, Occurrence degree evaluation

目    录
摘要……………………………………………………………………………………1
关键词…………………………………………………………………………1
1  前言………………………………………………………………………………2
2  材料和方法………………………………………………………………………3
    2.1  材料………………………………………………………………………3
      2.1.1  调查田块情况……………………………………………………3
      2.1.2  采集工具…………………………………………………………4
2.2  棉花病虫害调查方法……………………………………………………4
3  湘北地区棉花病虫害发生动态分析……………………………………………4
  3.1  沅江地区棉花病虫害发生动态及发生程度评估………………………4
    3.1.1  棉花虫害…………………………………………………………5
    3.1.2  棉花病害…………………………………………………………5
  3.2  安乡地区棉花病虫害发生趋势及发生程度评估………………………6
    3.2.1  主要虫害发生规律………………………………………………6
    3.2.2  主要病害发生规律………………………………………………7
  3.3  华容地区棉花病虫害发生规律和发生程度评估………………………8
    3.3.1  棉花主要虫害类型………………………………………………8
    3.3.2  棉花主要病害……………………………………………………9
  3.4  临澧地区棉花病虫害发生动态及发生程度评估………………………9
    3.4.1  棉花主要虫害类型………………………………………………9
    3.4.2  棉花主要病害……………………………………………………10
  3.5  澧县地区棉花病虫害发生趋势及发生程度评估………………………11
4  结论………………………………………………………………………………11
参考文献……………………………………………………………………………12
致    谢……………………………………………………………………………14