Factors Potentially Affecting Oviposition Site Selection by the Lady Beetle<i>Coleomegilla maculata</i>(Coleoptera: Coccinellidae)

Griffin, Marisa L.; Yeargan, Kenneth V.

doi:10.1603/0046-225x-31.1.112

Cited by 34 publications

(27 citation statements)

References 17 publications

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“…For example, Orius insidiosus chooses to lay eggs on non-crop plants whose characteristics facilitate the development of their progeny ; the predatory heteropteran Geocoris punctipes also lays its eggs preferentially on specific cropland weeds (Naranjo and Stimac, 1987). Likewise Coleomegilla maculata lays its eggs on non-crop plants whose trichomes protect the progeny from intraguild predation (Griffen and Yeargan, 2002;Seagraves and Yeargan, 2006). In addition to removing susceptible members of a weed community, glyphosate application can sometimes affect the architecture of the remaining plants (Clements et al, 1990), which may also alter their suitability to natural enemies.…”

Section: Plant Communities Associated With Herbicide-tolerant Cropsmentioning

confidence: 99%

Ecological compatibility of GM crops and biological control

et al. 2009

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Insect-resistant and herbicide-tolerant genetically modified (GM) crops pervade many modern cropping systems (especially field-cropping systems), and present challenges and opportunities for developing biologically based pest-management programs. Interactions between biological control agents (insect predators, parasitoids, and pathogens) and GM crops exceed simple toxicological relationships, a priority for assessing risk of GM crops to non-target species. To determine the compatibility of biological control and insect-resistant and herbicide-tolerant GM crop traits within integrated pest-management programs, this synthesis prioritizes understanding the bi-trophic and prey/host-mediated ecological pathways through which natural enemies interact within cropland communities, and how GM crops alter the agroecosystems in which natural enemies live. Insect-resistant crops can affect the quantity and quality of non-prey foods for natural enemies, as well as the availability and quality of both target and non-target pests that serve as prey/hosts. When they are used to locally eradicate weeds, herbicide-tolerant crops alter the agricultural landscape by reducing or changing the remaining vegetational diversity. This vegetational diversity is fundamental to biological control when it serves as a source of habitat and nutritional resources. Some inherent qualities of both biological control and GM crops provide opportunities to improve upon sustainable IPM systems. For example, biological control agents may delay the evolution of pest resistance to GM crops, and suppress outbreaks of secondary pests not targeted by GM plants, while herbicide-tolerant crops facilitate within-field management of vegetational diversity that can enhance the efficacy of biological control agents. By examining the ecological compatibility of biological control and GM crops, and employing them within an IPM framework, the sustainability and profitability of farming may be improved. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. b s t r a c tInsect-resistant and herbicide-tolerant genetically modified (GM) crops pervade many modern cropping systems (especially field-cropping systems), and present challenges and opportunities for developing biologically based pest-management programs. Interactions between biological control agents (insect predators, parasitoids, and pathogens) and GM crops exceed simple toxicological relationships, a priority for assessing risk of GM crops to non-target species. To determine the compatibility of biological control and insect-resistant and herbicide-tolerant GM crop traits within integrated pest-management programs, this synthesis prioritizes understanding the bi-trophic and prey/host-mediated ecological pathways through which natural enemies interact within cropland communities, and how GM crops alter the agroecosystems in which natural enemies live. Insect-resistant crops can...

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Section: Plant Communities Associated With Herbicide-tolerant Cropsmentioning

confidence: 99%

Ecological compatibility of GM crops and biological control

et al. 2009

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“…This fact has been observed with coccinellids and other plants possessing glandular trichomes (Obrycki and Tauber, 1985;Cottrell and Yeargan, 1999). Griffin and Yeargan (2002b) showed that predator eggs survived better on plants that possessed glandular trichomes versus glabrous plants, and used this fact to explain Coleomegilla maculata's preference for these species. In the case of O. insidiosus, nymphal success does not entirely explain the acceptability of plant species, since nymphs reared on peppers did poorly compared with those reared on tomato, yet these plants were equally acceptable to O. insidiosus females (Coll, 1996).…”

Section: Resultsmentioning

confidence: 67%

“…But the avoidance of this plant is in spite of this plant being suitable for egg development; five of six eggs that were laid and monitored on velvetleaf hatched without abnormality. In other predator species, Coleomegilla maculata, predation of egg masses is considerably lower on velvetleaf than on other plants occurring in the corn system (Griffin and Yeargan, 2002b). This fact has been observed with coccinellids and other plants possessing glandular trichomes (Obrycki and Tauber, 1985;Cottrell and Yeargan, 1999).…”

Section: Resultsmentioning

confidence: 86%

The Oviposition Behavior of the Predator Orius insidiosus: Acceptability and Preference for Different Plants

Lundgren

Fergen

2006

Biocontrol

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The ability of natural enemies to reproduce within cropland and effectively suppress pests depends on the presence of plants on which to oviposit within the agroecosystems. Our research investigates the acceptability and preferences of a range of plants for oviposition by the predatory bug Orius insidiosus (Say) (Hemiptera: Anthocoridae) in the laboratory. Within-plant preferences on pole beans as oviposition sites were evaluated in laboratory choice tests. The acceptability and preference of O. insidiosus females for pole bean, soybean, redroot pigweed, and velvetleaf were evaluated in choice and no-choice tests (respectively) in the laboratory. Observations on the acceptability of green foxtail, orchardgrass, buffalograss, smooth brome, redtop grass, blue grama, and tall fescue for oviposition were also conducted. O. insidiosus preferred to lay its eggs on the petiole and leaflet petioles of pole beans, and did not distinguish among nodes or petioles of different lengths. Although all broadleaved plants were suitable for egg development, the acceptability of these plants differed significantly, with pole beans being most acceptable and almost no eggs being laid on velvetleaf. Preference tests supported the results of the no-choice tests, with pole bean being the most preferred, and no eggs being laid on the velvetleaf. Green foxtail and orchardgrass were the only grass species found to be acceptable to O. insidiosus. The implications of soybean monocultures on the reproductive capacity of and biological control by O. insidiosus are discussed, as are possible mechanisms underlying the decision-making process for oviposition.

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“…Earlier studies showed that predation rates on C. maculata eggs were very high on corn and smooth pigweed plants, often approaching 100% mortality Yeargan 1998b, GrifÞn andYeargan 2002b). Cottrell and Yeargan (1998b) found, over a 3-yr period, that cannibalism accounted for 88% of 289 cases of predation on C. maculata eggs on sweet corn plants, with the remaining 12% of the cases being predation by other Coleoptera, Hemiptera, Hymenoptera, Orthoptera, and Opiliones.…”

Section: Discussionmentioning

confidence: 99%