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- Title
Effects of plant hedgerow on population dynamics of wheat aphid and its natural enemies.
- Authors
Shi Guo-qing; Lin Chao-wen; Liu Zhang-yong; Li Chuan-ren; Chen Yi-bing; Ma Tao; Wang Qi-feng; Liu Zhi-long; Cai Qing-nian
- Abstract
This paper studied the effects of planting different kinds of plant hedgerow (Amorpha fruticosa, Vetiveria zizanioides, Eulaliopsis binata, and Medicago sativa) on the population dynamics of wheat aphid and its natural enemies in the hillside wheat fields in Ziyang City of Sichuan Province, Southwest China. On the 20° hillside, A. fruticosa hedgerow inhibited the occurrence of wheat aphid in the wheat field significantly, and the parasitoid densities were equal to or significantly lower than those in the wheat field with V. zizanioides hedgerow. On the 12° hillside, M. sativa and E. binata hedgerows delayed the peak time of wheat aphid occurrence, and E. binata hedgerow suppressed the wheat aphid population density significantly. In the wheat field with M. sativa hedgerow, the parasitoid densities were significantly higher than those with no hedgerow. An equal or significantly higher ladybird density was observed in the field with M. sativa hedgerow. The olfactory responses showed that E. binata volatiles had repellent effect on both Sitobion avenae and Rhopalosiphum padi, but attracted a spider species of oxyopidae. M. sativa volatiles attracted S. avenae, whereas neither M. sativa nor E. binata volatiles caused obvious behavior response of ladybird adults. Therefore, planting A. fruticosa and E. binata as the hedgerows in hillside wheat fields could not only prevent the soil erosion from seasonal rainfall, but also benefit the control of pest insects.
- Subjects
CHINA; WHEAT; POPULATION dynamics; HEDGEROW ecology; BIODIVERSITY; RHOPALOSIPHUM padi; SPIDERS; SOIL conservation
- Publication
Yingyong Shengtai Xuebao, 2011, Vol 22, Issue 12, p3265
- ISSN
1001-9332
- Publication type
Article