Effects of Climatic on Occurrence and Damage of Cnaphalocrocis medinalis in Yuqing County
[Objective]The influences of climate conditions from 2011-2020 on the occurrence and development of main pest generations of Cnaphalocrocis medinalis in Yuqing County were studied,which provided scientific basis for predicting and controlling C.medinalis.[Method]The data including information of C.medinalis,average temperature,precipitation,relative humidity,sunshine and wind speed from 2011 to 2020 were utilized,and then the migration,occurrence and development rules of C.medinalis population in 10 years were explored,and the climate data of 1 pentad(5 days)in advance,2 pentad(10 days)in advance and 3 pentad(15 days)in advance were also used to study the effect of climate on the occurrence and development of C.medinalis population.[Result]In recent 10 years,the beginning stage of moth repel in field and light trapping to C.medinalis first appeared on April 4 and April 23,2014,and appeared as late as May 30,2011 and May 23,2018,respectively.The first-appeared stage in 10 years were mainly from late April from mid May.The period of migration peak of the third main pest generation were mainly from late May to early and mid June,and the period of migration peak of the fourth main pest generation were mainly from late June to early and mid July.The immigration amount of the third generation of adult C.medinalis in the period of migration peak decided the occurrence situation of the third juvenile C.medinalis.The lowest temperature,precipitation and average relative humidity were the key climatic factors influencing the occurrence and development of C.medinalis population in Yunqing County.The higher daily lowest temperature,more the precipitation the higher average relative humidity in early 10-15 days were conducive to the proliferation and expansion of C.medinalis population in filed,so that the the leaf rolling rate of rice was higher which resulting heavier damage.[Conclusion]Early migration period,many peaks of migration,large migration volume and sufficient water vapor in the early stage are the key factors that promote the occurrence of C.medinalis.Climate factors such as temperature,precipitation and relative humidity are also important factors affecting the occurrence and development of C.medinalis.
climatic conditionsCnaphalocrocis medinalisthe third main pest generationthe fourth main pest generationYuqingGuizhou
NETL
NSTL
万方数据
维普
