The effect of resident vegetation cover on abundance and diversity of green lacewings (Neuroptera: Chrysopidae) on olive trees
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- 作者：Mario Porcel ; B. Cotes ; J. Castro ; M. Campos
- 关键词：Chrysoperla carnea s.l. ; Pseudomallada prasinus ; Habitat management ; Generalized additive mixed model (GAMM) ; Predator ; Weed cover
- 刊名：Journal of Pest Science
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：90
- 期：1
- 页码：195-206
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Entomology; Agriculture; Plant Pathology; Ecology; Forestry; Plant Sciences;
- 出版者：Springer Berlin Heidelberg
- ISSN：1612-4766
- 卷排序：90
文摘
Understorey habitats are optimal ecological structures for natural enemy enhancement in fruit orchards. A large-scale experiment was carried out to establish the effect of resident vegetation cover (VC) on green lacewings as compared to bare soil, the dominant soil management strategy used in Spanish olive orchards. Lacewings were sampled using baited McPhail traps for adults, and suction was used to collect adults and larvae from olive canopies. Additionally, we monitored the presence of the lacewing’s main target pest, olive moth eggs, as well as VC composition and density. McPhail trapping showed higher Chrysopidae abundances in VC plots during two consecutive years even though flowering plants represented 29.7 % of the total. Multivariate analysis identified Chrysoperla carnea s.l. and Pseudomallada prasinus as contributing to differences in abundance. VC slightly increased capture diversity; however, no specific link between any Chrysopidae species and VC was detected. No differences were observed in individuals collected through suction in 2009, which could be attributed to low sampling efficiency. In 2010, when sampling was increased considerably, higher adult and larval abundances were recorded in VC only with respect to C. carnea s.l. A delay was detected between McPhail captures and suction collection peaks. The fact that VC promoted higher abundance detected earlier through trapping, and later on olive canopies through suction, coinciding with P. oleae presence, suggests that resident VC may contribute to a build-up of green lacewing populations moving onto the crop at the time of the pest attack.