| 2008年广西第三代稻纵卷叶螟大发生特点及原因简析 |
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| 引用本文： | 唐洁瑜,王华生,刘建文.2008年广西第三代稻纵卷叶螟大发生特点及原因简析[J].中国农学通报,2009,25(2):192-195. |
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| 作者姓名： | 唐洁瑜 王华生 刘建文 |
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| 作者单位： | 广西壮族自治区植保总站,南宁,530022 |
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| 摘 要： | 稻纵卷叶螟是广西水稻主要害虫之一, 年发生6～8代，其中第2、3代是早稻主害代。2008年，受虫源、气候因子和种植条件等因素的综合影响，广西第3代稻纵卷叶螟发生呈现发生范围广、面积大、成虫峰次多、峰期持续长、蛾量大、虫口密度高、为害期长、田间虫态复杂等特点，发生面积75.6万hm2，为建国以来最严重的大发生年。作者分析，其主要原因为：5月下旬到6月中旬，第3代发生期气候适宜；第2代残留基数大，外地迁入数量多，第3代成虫滞留量多；水稻生育期推后、插花田增多，稻纵卷叶螟食料充足；由于雨日多，劳动力紧张，以及应急防治农药缺乏，造成应急防治实施难度大等。
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| 关 键 词： | 海峡两岸 海峡两岸 农业科技 合作发展 创新机制 |
| 收稿时间： | 2008-10-14 |
| 修稿时间： | 2008-10-25 |
Serious Occurrence Characteristics of Rice Leafroller(Third Generation)in Guangxi and Its Reason Analysis |
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| Tang Jieyu,Wang Huasheng,Liu Jianwen.Serious Occurrence Characteristics of Rice Leafroller(Third Generation)in Guangxi and Its Reason Analysis[J].Chinese Agricultural Science Bulletin,2009,25(2):192-195. |
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| Authors: | Tang Jieyu Wang Huasheng Liu Jianwen |
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| Institution: | (The General Station of Plant Protection of Guangxi Zhuang Autonomous Region, Nanning 530022) |
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| Abstract: | Rice leafroller（Cnaphalocrocis medinalis（Guenée）） is one of major rice pests, the second and third generation among 6~8 generations whole year seriously damage early rice. Influenced by pests source, climate and planting conditions etc. factors, there are several occurrence characteristics of third generation in guangxi, including occurrence wide range, large area, many adult peaks, long-period peaks, large number of moths, high population density, long-period damage, complex field insect, total occurrence area 756 000 hm2, being most serious occurrence one year since 1949. The authors analyze several main reasons, including suitable climate during occurrence period（from late May to mid-June）of third generation，large second generation residual base, large number of abroad migration moths, considerable quantities stranded third generation moths, delayed rice growing period, more bridge fields, adequate pest food, as a result of many rain days, labor tension, inadequate emergency control pesticides, being difficult to implement emergency control etc.. |
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| Keywords: | Guangxizz Rice Leafrollerzz Serious occurrencezz Reasonzz Analysiszz |
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