Spatial Distribution and Sampling Plans for Mesoplatys Ochroptera (Coleoptera: Chrysomelidae) on Sesbania

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dc.contributor.authorSileshi, G.
dc.contributor.authorBaumgartner, J.
dc.contributor.authorSithanantham, S.
dc.contributor.authorOgol, C.K.P.O.
dc.date.accessioned2018-04-04T09:28:50Z
dc.date.available2018-04-04T09:28:50Z
dc.date.issued2018-01-26
dc.descriptionResearch Articleen_US
dc.description.abstractWith the widespread introduction of the nitrogen-Þxing legume sesbania, Sesbania sesban (L.) Merril, in agroforestry systems, the defoliating beetle Mesoplatys ochroptera Stål has become a serious pest of the trees in Africa. To determine within-Þeld and within-plant spatial distribution of M. ochroptera on both seedlings and trees of sesbania, distribution statistics were computed using IwaoÕs mean crowding regression model. In 1- to 3-mo-old seedlings, the model accounted for 29.8, 32.2, and 61.0% of the variation observed in mean crowding to mean relationships in egg masses, larvae and adults, respectively. The model slopes of the regression were greater than unity for all stages indicating aggregated spatial distribution. Values of the intercept were greater than zero for egg masses, larvae and adults indicating that the basic components of the population are groups of individuals. The highest density ( 80%) of mating and feeding adults was found in the upper third of 1- to 2-months-old seedlings, while most of the egg masses were found in the lower half of seedlings. In trees,60% of the individuals of all stages were found in the lower third of the foliage canopy, while 10% were found in the upper third. Sampling adults was found to be easier and gave better density estimates of M. ochroptera population than egg masses and larvae. Therefore, sampling plans useful for population studies and decision-making in pest management were developed for adults.en_US
dc.description.sponsorshipCanadian International Development Agency (CIDA)en_US
dc.identifier.issn0022-0493
dc.identifier.issn1938-291X)
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/18288
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectMesoplatys ochropteraen_US
dc.subjectSesbania sesbanen_US
dc.subjectsamplingen_US
dc.subjectspatial distributionen_US
dc.titleSpatial Distribution and Sampling Plans for Mesoplatys Ochroptera (Coleoptera: Chrysomelidae) on Sesbaniaen_US
dc.typeArticleen_US
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