Analysis of economic loss from pest insects and plant disease in cotton of Chinaduring 1991-2000
Author of the article:FANG Xue1 GE Sai-Ying2 ZHANG Yong-Sheng3 CAO Jing3 OUYANG Fang1**
Author's Workplace：1. State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; 2, Fisher College of Business, Ohio State University Columbus, Ohio 43210, USA;3. College of Plant Protection, Hunan Agricultural University, Changsha 410128, China
Key Words：cotton, cotton pest insect, pathogen disease, occurrence area, yield enhance after control, actual loss yield after control, economic loss analysis
Abstract：[Objectives] Cotton is an important economic crop inChina. Frequent outbreaks of biological disasters such as plant disease and pest insect has been threatening the cotton production inChinasince 1991. [Methods] In current study, by using 20 years’ statistical data of cotton protection, cotton yields and occurrence of pathogens and pest insects, we mainly analyzed the potential tendency of occurrence areas, yield enhance after control, actual loss yield after control of cotton pest insect and disease from 1991 to 2010. [Results] Firstly, with respect to the pest insect, the occurrence areas and control areas decreased 24.2% and 15.1% while yield enhance after control, actual loss yield after control increased 25.3% and 22.4%, respectively. With respect to the pathogen disease, the occurrence areas, control areas, yield enhance after control, actual loss yield after control all increased 16.2%, 38.3%, 303.8% and 175.4%, respectively. Secondly, the occurrence areas, control areas, yield enhance after control, actual loss yield after control from pest insect were higher than these from pathogen diseases. Thirdly, although we took a series of control measures, the actual loss yield rate caused by insect pest and pathogen disease were elevated from 4.0% in 1991 to 5.7% in 2010. Specifically, the actual loss yield caused by pest insect and pathogen disease was increased from 19.06 ton and 3.90 ton in 1991 to 23.33 ton and 10.72 ton in 2010, respectively. Finally, pathogen diseases and pest insects of cotton mainly occurred in Middle and Eastern regions as well as Xinjiang’s districts ofChina. [Conclusion] Pest insects and pathogen disease are still important factors influencing the cotton production inChina. In order to effectively reduce the negative effect of cotton pest insect and pathogen disease, we should establish the risk assessment and monitor and warn those biological disasters in time, improve the ecological environment of farmland, increase the integrated pest management researches on regional farmland ecosystem, and then take corresponding and propermeasures.