The field surveys for overwintering and spring populations of the small brown planthopper \[Laodelphax striatellus (Fallén), SBPH\] 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 midJune, 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 longdistance flight. SBPH collected by the light trap showed a bimodal takeoff peak and they would immigrate at every hour during all night, but 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.
HE Yuan1 , ZHU Yubo1 , HOU Yangyang1 , YAO Shitong2 , LU Zhijie2 , JIN Zhouhao2 , ZHANG Xiaoxi1 , ZHAI Baoping1,*
. Fluctuation and Migration of Spring Population of Small Brown Planthopper (Laodelphax striatellus) on Wheat in Jiangsu and Zhejiang Provinces[J]. Chinese Journal OF Rice Science, 2012
, 26(1)
: 109
-117
.
DOI: 10.3969/j.issn.10017216.2012.01.017
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