The wheat curl mite, Aceria toschiella (Keifer), and a complex of viruses vectored by A. toschiella substantially reduce wheat yields in every wheat-producing continent in the world. The development of A. toschiella-resistant wheat cultivars is a proven economically and ecologically viable method of controlling this pest. This study assessed A. toschiella resistance in wheat genotypes containin...

BACKGROUND Rodenticide resistance to anticoagulants in Rattus norvegicus will lead to increased difficulties in combating these pest animals. Here, the authors present the results of a survey in the Netherlands where tissue samples and droppings were tested using a newly developed TaqMan PCR test for genotypic variation at codon 139 in the Vkorc1 gene associated with anticoagulant rodenticide r...

b a ckground: the german cockroach, b lattella germanica is a major hygienic pest and mechanical vector for path- ogenic agents in hospitals and residential areas. the development of insecticide resistance is a serious problem in controlling of this pest. toxicity of four commonly used insecticides (permethrin, cypermethrin, malathion and chlorpyrifos) against two hospital- collected strains of...

Cotton is one of the most important cash crops of India. It is grown for its lint and seed. In India, cotton was cultivated on an area of 11.70 million ha with a production of 29.00 million bales of seed cotton during 2013-14. Average productivity of cotton in India is 540 kg lint per ha, which is low when compared to world average of 766 kg lint per ha (AICCIP, 2013-14). The major limiting fac...

The tobacco aphid, Myzus persicae nicotianae is an economically important pest of tobacco, causing extensive yield losses especially as it is an important host of numerous viruses and the sudden shift from the green morph to the red morph is of concern as reports of insecticide resistance are common in this morph. The efficacy of several insecticides was studied, both in the laboratory and in t...

Elicitors are compounds, which activate chemical defences in plants. Various biosynthetic pathways are activated in treated plants depending on the compound used. The most intensively studied elicitor for manipulating defence pathways in plants is methyl jasmonate, which modifies e.g. the production of terpenoids, the main constituents of conifer oleoresin. Other commonly tested chemical elicit...

J. Econ. Entomo!. 81(2): 634-640 (1988) ABSTRACT Differences in susceptibility to damage by Thrips tabaci Lindeman and the lepidopteran pest complex (Plutella xylostella (L.), Artogeia rapae (L.), and Trichoplusia ni (Hiibner)) were documented and analyzed for fresh market and experimental cabbage varieties. Patterns of resistance to damage were different for Lepidoptera and T. tabaci. The comm...

Transgenic crops producing Bacillus thuringiensis (Bt) toxins kill some key insect pests and can reduce reliance on insecticide sprays. Sustainable use of such crops requires methods for delaying evolution of resistance by pests. To thwart pest resistance, some transgenic crops produce 2 different Bt toxins targeting the same pest. This "pyramid" strategy is expected to work best when selection...

As forest geneticists consider physiological adaptations of forest tree populations under various climate change scenarios, they must also take into account likely impacts from new insect pest and disease introductions, as well as increased natural disturbances from native pests. What lessons can be learned from past investments in disease and pest resistance research and genetic improvement, p...