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在2013年5-9月,采取5点取样,对云南省昭通温凉玉米种植区及普洱暖热玉米种植区玉米蚜种群动态进行定期、定点、定株的系统调查,明确云南省两种不同生态条件下玉米种植区玉米蚜发生规律及分布特征,为玉米蚜的防治提供理论依据。结果显示:昭通温凉玉米种植区玉米蚜在玉米各生育期均有发生;玉米蚜在抽雄散粉期主要集中在雄穗为害,籽粒建成期以后转移集中在苞叶及雌穗为害;玉米蚜在玉米田始终呈聚集分布,聚集度呈聚集—扩散—聚集趋势。普洱暖热玉米种植区玉米蚜种群数量在玉米进入籽粒建成期后才有所增长;玉米蚜在籽粒建成期以后主要集中在苞叶及雌穗上为害;玉米蚜在玉米田基本呈聚集分布,聚集度始终呈扩散趋势。两地玉米蚜自然种群消长、垂直分布动态,空间动态均具有一定差异,昭通温凉玉米种植区相对更适宜玉米蚜的发生。
From May to September 2013, a sampling of 5 o’clock was carried out to systematically investigate the population dynamics of aphids in the warm and cool corn planting areas and the warm and dry corn growing areas in Pu’er, Yunnan Province. Under the ecological conditions, the occurrence and distribution characteristics of corn aphids in corn planting areas provide the theoretical basis for the prevention and control of corn aphids. The results showed that: corn aphids occurred in corn growing area in Zhaotong warm and cool corn; corn aphid mainly concentrated in tassel at tasseling stage; corn aphid was concentrated in bract and ear during grain filling stage; The corn field always gathered and distributed, and the aggregation degree showed the tendency of aggregation, diffusion and aggregation. The population of corn aphid in the warm corn planting area of Pu’er increased only after the corn entered the grain construction period. The corn aphid mainly concentrated on the husk and ear of the corn after the grain was constructed. The corn aphid was basically aggregated and distributed in the corn field, Degree of aggregation has always been a trend of proliferation. The population dynamics of natural population, vertical distribution and spatial dynamics of the corn aphids in both areas differed from each other, and the Zhaotong warm and cool corn planting areas were more suitable for the occurrence of the corn aphids.