论文部分内容阅读
[目的]研究超级籼粳杂交稻甬优6号褐飞虱种群繁殖速率的密度制约效应。[方法]在超级籼粳杂交稻甬优6号不同生育期即分蘖期、孕穗期、灌浆期分别接入不同虫量褐飞虱,调查并分析超级稻褐飞虱种群繁殖速率及其变化动态。[结果]分蘖期:褐飞虱孕穗期、灌浆期种群数量随分蘖期种群基数的增加而逐渐增加;当灌浆期褐飞虱种群密度升高达到一定限度(>250头/丛)时,其乳熟期种群数量随该密度的加大而呈下降趋势;超级稻甬优6号褐飞虱种群发展呈现中间快、两头慢的特点。孕穗期:褐飞虱种群发展在孕穗至灌浆期是随着其基数密度升高而升高,但到乳熟期相关性表现却不显著;超级稻中后期褐飞虱种群仍具有高繁殖能力,对水稻产量潜存极大威胁。灌浆期:褐飞虱种群密度<70头/丛时,其种群发展仍随着其基数密度升高而升高,对产量仍潜存较大威胁。[结论]研究结果为建立和健全褐飞虱监测预警体系、经济有效生态控制超级稻褐飞虱发生危害、提高褐飞虱持续控制能力提供理论依据。
[Objective] The research aimed to study the density control effect of the propagation rate of Nilaparvata lugens (POPH) in Yongyou 6, a super japonica hybrid rice. [Method] Nilaparvata lugens (BPN) with different insect populations at different growth stages, ie, the tillering stage, the booting stage and the filling stage of the super indica / japonica hybrid rice Yongyou 6 were used to investigate and analyze the reproductive rate and dynamics of the planthopper. [Result] At the tillering stage, the populations of BPH at booting and filling stage increased with the increasing of tillering stage population. At the filling stage, the population of milky stage was more than 250, The number decreased with the increasing of density. The population development of Nilaidaiyou 6 showed a fast intermediate and slow trait. Booting stage: The population development of BPH at booting stage to filling stage increased with the increase of its base density, but the correlation was not significant at milky stage. The population of BPH at mid- and late-stage also had high reproductive capacity, Substantial threat. During the filling stage: the population density of BPH population <70 heads / plexus population is still increasing with the increase of its base density, which is still a big threat to the production. [Conclusion] The results provided the theoretical basis for establishing and perfecting the monitoring and early warning system of BPH, controlling the occurrence and the damage of the brown planthopper in a cost-effective and ecological way.