Effects of Living Mulches on Predator Abundance and Sentinel Prey in a Corn–Soybean–Forage Rotation
By J. Prasifka, N. Schmidt, K. Kohler, M. O'Neal, R. Hellmich, J. Singer. 2006
88 citations recorded by the source corpus.
Abstract Living mulches are cover crops grown concurrently within main crops for their benefits to weed control and soil quality. Because living mulches increase the diversity of vegetation in agricultural systems, they may impact the abundance or effectiveness of natural enemies. To examine the effects of living mulches on epigeal predators, arthropod abundance and feeding were examined in a rotation of corn (Zea mays L.), soybean (Glycine max L. Merr.), and forage crops in 2004 and 2005. Compared with a no-mulch control, the presence of alfalfa (Medicago sativa L.) and kura clover (Trifolium ambiguum M. Bieb.) mulches in corn and soybean increased predator abundance and consumption of European corn borer (Ostrinia nubilalis Hübner; Lepidoptera: Crambidae) pupae used as sentinel prey. A complementary effect of increased predation caused by corn and soybean was found when both annual crops with living mulches were compared with mulches grown alone. Positive correlations between the percentage of O. nubilalis pupae preyed on and ground beetle (Coleoptera: Carabidae) abundance suggest carabids contributed to the differences in predation. In 2005, fewer beetles correlated with consumption of O. nubilalis pupae [Poecilus chalcites (Say) and Scarites quadriceps Chaudior] were collected, and living mulch impacts on predation were less frequent. Both changes could be related to delayed herbicidal suppression of the living mulches in 2005, which seemed to homogenize predator community composition among the corn, soybean, and forage plots. Although living mulches alone may not provide sufficient pest suppression, their potential to enhance biological control should be considered along with their other agronomic benefits.
Subfields: Insect Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/6b02a2b9d96f71fc032612818cbe53ed205dc92b
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Citations in the corpus
- Ecological compatibility of GM crops and biological control (2009, unknown): “…of field-wide management tactics that persist throughout a portion of the crop’s life and can be subsequently removed or their competitive capabilities reduced using herbicides (Altieri and Letourneau, 1982; Bugg and Waddington,1994; Landis et al., 2000; O’Neal et al., 2005; Prasifka et al., 2006).”
- Agroecosystem management and biotic interactions: a review (2011, background): “Many studies have shown that planting a cover crop in perennial and annual cropping systems may improve pest control (Altieri et al. 1985; Meyer et al. 1992; Wyss 1995; Pfiffner and Wyss 2004; Prasifka et al. 2006; Schmidt et al. 2007).”