摘要
八斑球腹蛛对褐飞虱的种群数量有一定的控制作用。田间日捕食量为0.25～1.88头。试验室内,其功能反应可用Ⅱ型和Ⅲ型反应模型拟合;当空间容积增大时,为典型的S形Ⅲ型。为此,虫蛛比应是随褐飞虱密度、龄期结构和防治指标等变化的函数。
The spider, T. octomacuJatum, an important predator of rice hoppers, could attack 0.25-1.88 brown planthoppers (N. lugens) in a day. The functional response of the spider to N. lugens was simulated with Hoi ling's II and Sigmoid III type models in the laboratory. The functional response model became a typical Sigmoid III type when the space and complexity of the experimental arena increased. It is speculated that the population ratio between the spider and N. lugens in the field fluctuates with the density and age-structure,of the pest and the economic threshold for the control of the planthopper.
基金
国家自然科学基金委员会资助
关键词
水稻
褐飞虱
八斑球腹蛛
捕食作用
Theridion octomaculatum Nilaparvata lugens functional response rice pest spiders
