Fluctuation and Migration of Spring Population of Small Brown Planthopper (Laodelphax striatellus) on Wheat in Jiangsu and Zhejiang Provinces
Fluctuation and Migration of Spring Population of Small Brown Planthopper (Laodelphax striatellus) on Wheat in Jiangsu and Zhejiang Provinces
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DOI：
10.3969/j.issn.1001-7216.2012.01.0.17
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Zhai Bao-ping
中科院分区：
文献类型：
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作者：
He Yuan;Zhu Yu-bo;Zhai Bao-ping
在苏北地区和浙江海宁地区进行了小褐飞虱（ladelphax striatellus (Fallen)， SBPH）对小麦和杂草越冬种群和春季种群的野外调查，并观察了小褐飞虱在灯诱下逐小时迁徙的情况。结果表明：10月至次年3月，SBPH以3 ~ 5龄（以4龄为主）在小麦、杂草和水稻残茬上越冬；越冬若虫在三月结束冬眠，在三月至四月间出现。第一代若虫于4 ~ 5月在小麦中发现。从5月底到6月中旬，大翅成虫在麦田中大量迁移，然后经过短途或长途迁移到稻田和杂草中。通过卵巢发育状况可以区分迁出和迁入人群。每小时收集的捕光器捕获量显示，在黎明和黄昏起飞后，SBPH确实有规律地迁移了几个小时，甚至是一整夜的长途飞行。诱光器采集的小蠊呈双峰型起飞高峰，夜间每小时一次迁移。但主要是在午夜之前。利用NOAA HYSPLIT模型对移民来源区进行轨迹分析。这证明了小农移民可能来自苏中、苏北地区。安徽省南部，浙江省南部，江西省东北部，福建省西北部。
The field surveys for overwintering and spring populations of the small brown plant hopper [Laodelphax striatellus (Fallen), SBPH] on wheat and weeds were performed, and the hourly immigration under the light trap was observed in northern Jiangsu Province and Haining, Zhejiang Province. The results illustrated that SBPH overwintered as 3rd-5th instars (mainly as 4th instar) on wheat, weeds and rice stubble from October to the next March. The overwintering nymphs finished their dormancy in March and emerged during March to April. The first generation nymphs were found in wheat during April to May. From the end of May to the mid-June, mass of the macropterous adults of SBPH emigrated in wheat fields, then immigrated into rice fields and weeds after a short or long journey. The emigrated and immigrated population could be distinguished by the status of ovarian development. The hourly collected light trap catches revealed that SBPH did migrate regularly for several hours after taking off at dawn and dusk, even, an all night long-distance flight. SBPH collected by the light trap showed a bimodal takeoff peak and they would immigrate at every hour during all night. hut mainly before midnight. The source regions of the immigrants were tracked by trajectory analysis using NOAA HYSPLIT model. which proved that the SBPH immigrants might come from the middle and north Jiangsu Province. southern Anhui Province, southern Zhejiang Province, northeastern Jiangxi Province and northwestern Fujian Province.