摘要
麦田蚜虫不论在一般年份还是大发生年份,不论在施药前或施药后,其天敌的数值反应均为指数类型,即Y=A·EXP(BX)。用Solomen回归系数法计算回归系数表明,该数值反应为反密度制约关系或与密度无关。虽然天敌对蚜虫种群数量的增长有一定的抑制作用,但是在蚜虫影响小麦产量的关键期,若蚜虫数量在防治标准之上,仍需采用化学防治的方法。上述反应与经典数值反应不同,属于节肢动物与作物种类引起的特殊反应类型。
Whether wheat aphids are in the average or in the occuring year before or after spraying insecticide, the numerical response of natural enemy is the index form, namely F = A EXP (BA-) , The regression coefficient was computed by Solomen regression coefficient method, indicating that the numerical response should be related to the reverse density or not to the density. Although the natural enemies can inhibit the aphid population to some extent, the chemical controlling must be adopted in the key stage when the number of aphids is over the controlling norm to affect wheat yields. The above response is different from the typical numerical response,falling into the peculiar type of arthropod and crop species.
出处
《西北农业大学学报》
CSCD
1991年第3期32-36,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
高等学校博士点基金
关键词
小麦
麦蚜
天敌
防治
种群
数值
aphididae, Triticum aestivum, utilization of natural enemies, population dynamics/numerical response
