云南早稻区白背飞虱种群增殖影响因子分析
Analysis of factors affecting population growth of the white-backed planthopper (Sogatella furcifera) in early rice crop areas of Yunnan Province
李向永1** 谌爱东1*** 田维逵2 石小云2 尹艳琼1 赵雪晴1
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DOI：10.7679/j.issn.2095-1353.2017.034
作者单位：1. 云南省农业科学院农业环境资源研究所，昆明 650205；2. 云南省勐海县植保植检站，勐海 666200
中文关键词：白背飞虱，正交实验，种群增殖
英文关键词：SogateIla furcifera, orthogonal experiment, population proliferation
中文摘要：【目的】 明确云南早稻区白背飞虱SogateIla furcifera Horváth在不同品种、不同虫口密度及不同生育期组合条件的种群增殖能力。【方法】 采用正交实验设计，分析了不同虫口密度，不同生育期和不同水稻品种组合条件下白背飞虱的种群增殖倍数。【结果】 水稻生育期和接虫密度对种群增殖倍数的影响分别达到了极显著和显著水平，而品种的影响不显著。移栽期、拔节期、孕穗期和抽穗期的种群增殖倍数分别为10.0倍、8.8倍、2.6倍和1.3倍，移栽期与孕穗期、抽穗期的种群增殖倍数差异极显著（P<0.01），拔节期与孕穗期、抽穗期的种群增殖倍数差异极显著（P<0.01）；5、10、20、40对/丛的增殖倍数分别为9.2倍、6.1倍、4.3倍、3.1倍，5对/丛与40对/丛处理间种群增殖倍数差异极显著（P<0.01），5对/盆与20对/盆处理间种群增殖倍数差异显著（P<0.05）；滇泷201、两优2161、内5优306和两优多系1号的种群增殖倍数分别为7.8倍、5.9倍、4.3倍、4.8倍，各品种间差异不显著（P>0.05）。【结论】 勐海早稻区，水稻生育期对种群增殖倍数的影响极显著，接虫密度的影响显著，主栽品种对种群增殖倍数影响不显著；在移栽期至拔节期，较低的迁入密度能导致较大的种群增殖率。
英文摘要：
[Objectives] To determine the population growth rate of the white-backed planthopper (SogateIla furcifera (Horváth) on different rice varieties, at different stages of the rice growing season, and different initial plant-hopper population densities. [Methods] We used an orthogonal experimental design to analyze the impact of initial planthopper density, rice variety, and stage of the growing season, on the population growth rate of S. furcifera. [Results] Population growth rates were significantly affected by both rice developmental period (P<0.01) and initial planthopper density (P<0.05). Population growth rates during the transplanting period, jointing stage, booting stage, and heading stage, were 10.0, 8.8, 2.6 and 1.3, respectively; the population growth rate during the transplanting period was significantly higher than that recorded during all other growing stages (P<0.01). Growth rates at 4 initial densities (5 pairs/clump, 10 pairs/clump, 20 pairs/clump, 40 pairs/clump) were 9.2, 6.1, 4.3 and 3.1, respectively; the growth rate at 5 pairs/clump was significantly different to that at 40 pairs/clump (P<0.01), and to that at 20 pairs/clump (P<0.05). Population growth rates on the rice varieties Dianlong 201, Liangyou 2161, Neiwuyou 306 and Liangyouduoxi 1 were 7.8, 5.9, 4.3 and 4.8, respectively, which were not significantly different (P>0.05). [Conclusion] There was no significant difference in the population growth rate of the white-backed planthopper on different rice varieties in the early rice season in Menhai County. Lower initial density of S. furcifera can result in a faster population growth from the transplanting to the jointing stage.