Despite its appeal to explain plant invasions, the enemy release hypothesis (ERH) remains largely unexplored for tropical forest trees. Even scarcer are ERH studies conducted on the same host species at both the community and biogeographical scale, irrespective of the system or plant life form. In Cabrits National Park, Dominica, we observed patterns consistent with enemy release of two introdu...

Hard red winter wheat was treated with pirimiphos-methyl at 4, 6 and 8 mg kg(-1), synergized pyrethrins at 0.38, 0.75, 1.13 and 1.5 mg kg(-1), and combinations of the two insecticides, to conduct laboratory bioassays against four beetle pests of stored grain, red flour beetle Tribolium castaneum (Herbst), rusty grain beetle Cryptolestes ferrugineus (Stephens), lesser grain borer Rhyzopertha dom...

The aim of this project was to evaluate the utility of capture-recapture (CR) estimation methodology, together with easily accessible sources of information, for monitoring the frequency of diabetes mellitus in a developing country. On the Caribbean island of Dominica, from July 1995 through July 1996, the names were collected of all individuals who were listed in at least one of three sources ...

E€ects of geographical origin of strain, season of ®eld collection, genetic background, and number of generations of laboratory rearing on ̄ight initiation, body weight, and lipid content of lesser grain borer, Rhyzopertha dominica, were studied. Signi®cant di€erences in ̄ight initiation, body weight, and total lipid content occurred among the four ®eld strains collected from Kansas, Oklahoma, ...

Abstract Background The lesser grain borer, Rhyzopertha dominica is a serious pest of stored grains. Fumigation and contact insecticides play major role in managing this globally. While insects are developing genetic resistance to chemicals, hormonal analogues such as s-methoprene key reducing general pressure well populations that resistant fumigants neurotoxic insecticides. However, has been ...

Aim Islands are ‘nature's laboratories of evolution’. Most island biogeographical studies have focussed on remote volcanic chains. Here, we challenge patterns using a slowly evolving recent colonist present five islands in nonlinear chronosequence chain. Location The Lesser Antilles (Caribbean). Taxon Magnolia dodecapetala (Magnoliaceae). Methods Genetic diversity was characterised Sanger seque...