Topic
Stemborer
About: Stemborer is a research topic. Over the lifetime, 206 publications have been published within this topic receiving 3243 citations.
Papers published on a yearly basis
Papers
TL;DR: It is found that egg deposition by stemborer moths on maize landrace varieties caused emission of HIPVs that attract parasitic wasps, however, the oviposition-induced release of parasitoid attractants was completely absent in commercial hybrid maize varieties.
Abstract: Natural enemies respond to herbivore-induced plant volatiles (HIPVs), but an often overlooked aspect is that there may be genotypic variation in these 'indirect' plant defence traits within plant species. We found that egg deposition by stemborer moths (Chilo partellus) on maize landrace varieties caused emission of HIPVs that attract parasitic wasps. Notably, however, the oviposition-induced release of parasitoid attractants was completely absent in commercial hybrid maize varieties. In the landraces, not only were egg parasitoids (Trichogramma bournieri) attracted but also larval parasitoids (Cotesia sesamiae). This implies a sophisticated defence strategy whereby parasitoids are recruited in anticipation of egg hatching. The effect was systemic and caused by an elicitor, which could be extracted from egg materials associated with attachment to leaves. Our findings suggest that indirect plant defence traits may have become lost during crop breeding and could be valuable in new resistance breeding for sustainable agriculture.
250 citations
TL;DR: Assessment of the ‘push–pull’ technology in maize-based farming systems in western Kenya demonstrates that the technology is equally effective in controlling both pests with concomitant yield increases under farmers’ conditions.
179 citations
TL;DR: Overall results indicate the suitability of the Desmodium spp.
157 citations
TL;DR: The results show that insect responses are dependent on the quality of volatile emission rather than merely the quantity in this multitrophic interaction.
Abstract: Plants subjected to insect attack usually increase volatile emission which attracts natural enemies and repels further herbivore colonization. Less is known about the capacity of herbivores to suppress volatiles and the multitrophic consequences thereof. In our study, the African forage grass, Brachiaria brizantha , was exposed to ovipositing spotted stemborer, Chilo partellus , moths. A marked reduction in emission of the main volatile, ( Z )-3-hexenyl acetate ( Z 3HA), occurred following oviposition but the ratio of certain other minor component volatiles to Z 3HA was increased. While further herbivore colonization was reduced on plants after oviposition, the new volatile profile caused increased attraction of an adapted parasitoid, Cotesia sesamiae . Our results show that insect responses are dependent on the quality of volatile emission rather than merely the quantity in this multitrophic interaction.
125 citations
TL;DR: It was concluded that four of the varieties tested had potential for use as trap crops in C. partellus management because they were more preferred by the borer moths for oviposition and allowed minimal survival of the larvae.
Abstract: Ten Napier grass [Pennisetum purpureum Schumach (Poaceae)] varieties, used in various parts of Kenya as animal fodder, were tested for their potential role as a trap crop in the management of the gramineous spotted stemborer, Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), through habitat manipulation. Oviposition preference and larval survival and development were determined for each of these varieties under laboratory and screen-house conditions. Two-choice tests revealed that seven of the varieties tested were preferentially chosen by gravid female moths for oviposition over a susceptible maize cv. Inbred A. Larval survival was significantly lower on the majority of the Napier grass varieties (about 10%) than on maize cv. Inbred A (about 60%). Similarly, larval development was about 2 weeks longer on the majority of the Napier grass varieties. It was concluded that four of the varieties tested (Bana, Ex-Machakos, Gold Coast, and Ex-Nyanza-2) had potential for use as trap crops in C. partellus management because they were more preferred by the borer moths for oviposition and allowed minimal survival of the larvae. This minimal larval survival is desirable in the conservation of C. partellus natural enemies when the cultivated host plant is out of season.
117 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 8 |
| 2020 | 6 |
| 2019 | 8 |
| 2018 | 9 |
| 2017 | 6 |
| 2016 | 7 |