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本项工作从褐飞虱各发育阶段的发育速度、存活率及繁殖力等方面系统地研究温度与褐飞虱种群数量变动的关系。实验种群观察结果表明:在28℃条件下,其未成熟期的历期最短(20.7天)、存活率最高(81.91%)、产卵量最大(705.4粒/头)。组建了五种温度条件下的褐飞虱实验种群年龄特征生命表,并计算其内禀增长能力。在22～32℃范围内,实验种群的内禀增长能力呈抛物线趋势,据二次方程计算结果表明,理论上在26.12℃时其周限增长速率最大,λ=1.1988/日;27℃时λ=1.1955/日。通过后季稻田间虫量及小气候温度系统观测证实,褐飞虱理论最适温度和后季稻褐飞虱自然种群猖獗发生的日均温27℃、28℃的气温条件是一致的。据此提出以褐飞虱发生期内适温日(日均温27℃、28℃)出现多少作为年度间后季稻褐飞虱发生程度的温度指标的讨论意见。
This work systematically studied the relationship between temperature and population dynamics of BPH population in terms of developmental rate, survival rate and fecundity at various developmental stages of BPH. The observation results of the experimental population showed that the duration of immature period was the shortest (20.7 days), the highest survival rate (81.91%) and the largest fecundity (705.4 seeds / head) at 28 ℃. The age-specific life tables of BPH experimental population under five temperature conditions were set up and their intrinsic growth capacity was calculated. In the range of 22 ~ 32 ℃, the intrinsic population growth ability of the experimental population showed a parabolic trend. According to the quadratic equation, the theoretical maximum growth rate at the temperature of 26.12 ℃ was λ = 1.1988 / day. At 27 ℃, λ = 1.1955 / day. The results showed that the optimal temperature for the planthopper and the natural population of the planthopper of the planthopper, Nilaparvata lugens, were 27 ℃ and 28 ℃ respectively. Based on this, the author put forward the opinion that how many appear as the temperature index of the post-season rice brown planthopper occurrence in the season during the temperature-related days (average daily temperature 27 ℃, 28 ℃) of the brown planthopper.