摘要
对重庆市郊区 1998年至 1999年春玉米上蚜虫种群的发生情况进行了系统调查。结果表明 ,在春玉米上取食危害的蚜虫主要有 4种 ,以玉米蚜为优势种群。玉米蚜虫混合种群的数量消长呈现 5月中下旬和 6月下旬两个高峰 ;几种蚜虫的混合种群在玉米田中的动态分布始终呈聚集分布。采用负二项分布K和聚块型指标M /X对聚集或扩散的趋势分析判断表明 ,随着玉米的生长发育 ,玉米蚜虫表现出扩散—聚集—再扩散—再聚集的趋势 ,而且聚集强度的变化有明显的季节性规律。
A systematic investigation was made of the aphid populations and their bio-distribution on spring-sown maize plants in 1998～1999 in the suburbs of Chongqing. The results indicated that three aphid populations, i.e. Rhopalosiphum maidis Fitch., Rh. padi Linn. and Sitobion avenae Fabricius, showed a collective distribution on the spring-sown maize throughout the whole growth period of the crop, but the gathering intensity changes seasonally. The mixed aphid population traded off during the growth period of maize and two peaks of quantitative counts were shown in mid- and late May and late June.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2002年第1期13-16,共4页
Journal of Southwest Agricultural University
基金
重庆市应用基础研究项目 (1 998- 5 - 1 88)
关键词
春玉米
数量消长
空间动态
maize aphids
Rhopalosiphum maidis Fitch.
population dynamics
maize
