---

期 刊 ：植物保护学报 2009年

关键词：小麦；麦长管蚜；遗传多样性；间作；生态调控；

Keywords:wheat, Sitobion avenae, genetic diversity, intercropping, ecological regulation,

摘 要 ：为探讨麦田遗传多样性对麦长管蚜的生态效应,系统调查了麦长管蚜及其天敌的种群时序变化,并分析了对麦长管蚜空间分布的影响。结果表明,所有间作处理麦田中高峰期麦长管蚜无翅蚜的百株蚜量均显著低于单作麦田,其顺序为:小麦单作北京837(7 422.0头)>与KOK间作(5796.7头)>与红芒红间作(5406.7头)>与郑州831间作(5291.7头)>与JP2间作(4493.4头)>与中四无芒间作(4155.0头),且麦蚜由聚集分布趋于均匀分布;蚜茧蜂发生的高峰期,各间作处理麦田中蚜茧蜂的平均数量高于小麦单作田,且差异达极显著水平(P<0.01);各间作处理麦田小麦理论产量增加,与小麦单作处理差异显著(P<0.05)。表明大田小麦品种间作抗蚜品种对麦长管蚜有显著的调控作用。

Abstract:To study the ecological effect of genetic diversity in wheat field on Sitobion avenae, the population dynamic of S.avenae and it’s natural enemies was investigated systematically in wheat fields, the spatial distribution of S.avenae was also analyzed. The results showed that, compared with monocultures, cv. Beijing 837, the amount of S.avenae apterae per 100 plants in intercropping patterns were significantly lower during aphid peak period, and the cascade of population densities was that cv. Beijing 837 monoculture (7422.0)>intercropped with cv. KOK (5796.7)>intercropped with cv. Hongmanghong (5406.7)>intercropped with cv. Zhengzhou831 (5291.7)>intercropped with cv. JP2(4493.4)>intercropped with cv. Zhongsiwumang (4155.0), and the spatial distribution of S.avenae were changed from aggregated pattern to uniform one. In aphid parasitoids peak period, there were higher population densities of aphid parasitoids in each intercropping field with the very significant level of P<0.01. The theoretical yield were more increasing with the significant level of P<0.05. Above all, the intercropping of wheat varieties of different resistances to aphids with the field cultivar could own an obvious advantage in ecological regulation to S.avenae.

---