BACKGROUND AND METHODOLOGY There is a continuing need to express new insect control compounds in transgenic maize against western corn rootworm, Diabrotica virgifera virgifera (LeConte) (WCR). In this study three experiments were conducted to determine cross-resistance between the new insecticidal DvSnf7 dsRNA, and Bacillus thuringiensis (Bt) Cry3Bb1; used to control WCR since 2003, with field-...

background and objectives: the prevalence of vibrio parahaemolyticus has been reported from ponnani earlier, however incidence of multidrug resistant strains have been encountered recently in clinical laboratories. the source for such strains and their presence in this major fish landing centre has been investigated. materials and methods: antibiotic sensitivity tests on isolates of v. parahaem...

In UK forestry, the synthetic pyrethroid insecticides alpha-cypermethrin and cypermethrin have been used for many years to provide protection young trees from damage by large pine weevil, Hylobius abietis L. However, concerns over toxicity of these has led a search alternatives. our work, applications 0.037 g.a.i.stem–1 acetamiprid provided high levels browsing, comparable or cypermethrin, with...

fumigant toxicity of rosemary essential oil on abamectin-resistant vs. susceptible populations of two spotted spider mites, tetranychus urticae koch was studied under laboratory conditions. results indicated that fumigant toxicity of rosemary essential oil on the susceptible population was 3.06 times higher than that of the resistant one. accordingly, there was a slight cross resistance observe...

The aphid, Myzus persicae is an important sucking pest and a virus vector in many crops. management of M. mainly through synthetic pesticides. development resistance against common pesticides has resulted control failures persicae. objective this study was to examine the status pesticide genetic structure populations. Samples were collected from cabbage cultivations dry (Anuradhapura), wet (Kan...

The psyllid Diaphorina citri Kuwayama (Hemiptera: Psyllidae) is one of the most important pests of citrus worldwide because it efficiently vectors three bacteria in the genus Candidatus Liberibacter that cause the devastating citrus greening disease (huanglongbing). Current management practices for this insect pest rely on multiple sprays of foliar insecticides and one or two applications of so...

Recently, neonicotinoids have become the fastest-growing class of insecticides in conventional crop protection, with extensive usage against a wide range sucking and chewing pests. Neonicotinoids are widely used due to their high toxicity invertebrates, simplicity, flexibility which they may be applied, lengthy persistence, systemic nature ensures that spread all sections target crop. However, ...