Publications by authors named "C N Jessie"
The sorghum ( [L.]) agroecosystem of North America provided an opportunity to evaluate agroecosystem response to an invading insect herbivore, (Theobald) (sorghum aphid) (previously published as Zehntner) (Hemiptera: Aphididae) onto a widely planted crop that experiences a range of agro-landscape and weather conditions. Initial sorghum risk assessments after 's invasion in the mid-2010s provided forecasts of range expansion and annual migration, which were based on aphid life history, extent of sorghum cultivation and susceptibility to , and weather (aphid-plant-weather [APW] risk scenario).
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- Carabid beetles may help control pests in US annual ryegrass crops, especially during autumn and winter when pests like slugs and lepidopteran larvae are active.
- The study found that only certain carabid species actively feed on these pests, with one species showing a significant amount of gut DNA from lepidopteran and cranefly larvae.
- None of the carabid species studied were negatively impacted by disk tilling, but one species showed a preference for vegetated field margins, highlighting considerations for ecosystem management.
Article Synopsis
- - In the southern U.S., winter canola has become a popular oilseed crop, facing annual infestations from three aphid species: Brevicoryne brassicae, Lipaphis erysimi, and Myzus persicae, with differing effects on predator survival.
- - Laboratory studies showed that two predator species, Hippodamia convergens and Chrysoperla carnea, didn’t prefer one aphid type over another and all three aphids were suitable for their development.
- - However, the development rates and adult weights of the predators were negatively impacted by feeding on the Brassica specialist aphids, suggesting that the plant compounds they sequester may be harmful to the predators.