Insecticide resistance in German cockroaches (Blattella germanica (L.)) has been a barrier to effective control since its first documentation in the 1950s. A necessary first step toward managing resistance is to understand insecticide susceptibility profiles in field-collected strains so that active ingredients (AIs) with lowest resistance levels can be identified. As a first step in this study...

BACKGROUND Insect midgut microbiota is important in host nutrition, development and immune response. Recent studies indicate possible links between insect gut microbiota and resistance to biological and chemical toxins. Studies of this phenomenon and symbionts in general have been hampered by difficulties in culture-based approach. In the present study, DNA sequencing was used to examine the mi...

The fight against diseases spread by mosquitoes and other insects has enormous environmental, economic and social consequences. Chemical insecticides remain the first line of defence but the control of diseases, especially malaria and dengue fever, is being increasingly undermined by insecticide resistance. Mosquitoes have a large repertoire of P450s (over 100 genes). By pinpointing the key enz...

Response to the alarm pheromone, (E)-beta-farnesene, produced by many species of aphids, was assessed in laboratory bioassays using an aphid pest, Myzus persicae (Sulzer), and its primary endoparasitoid, Diaeretiella rapae (McIntosh). This was done in three separate studies, the first investigating responses of a large number of M. persicae clones carrying different combinations of metabolic (c...

Insecticide resistance has been known to be prevalent in several insect species including mosquito. It has become a major problem in vector control programme due to pesticide resistance through detoxification enzymes. The present study investigated the toxicity of Ae. aegypti to organophosphates and pyrethroid insecticide and biochemical mechanisms involved in insecticide resistance in larval p...

The annual bluegrass weevil (ABW), Listronotus maculicollis, is a serious and expanding golf course pest in the Northeast. Recently, decreased efficacy of pyrethroid adulticide applications and pesticide-resistant populations are reported from an increasing number of golf courses (Ramoutar et al. 2009a). The efficacy of most insecticides against pyrethroidresistant ABW populations seems to be r...

In the past decade, there has been rapid scale-up of insecticide-based malaria vector con‐ trol in the context of integrated vector management (IVM). But, the continued efficacy of vector control interventions is threatened by the selection of insecticide resistance. Evi‐ dence of insecticide resistance operationally undermining malaria vector control pro‐ grammes is invariably mounting and is ...

The use of pyrethroid insecticides in malaria vector control has increased dramatically in the past decade through the scale up of insecticide treated net distribution programmes and indoor residual spraying campaigns. Inevitably, the major malaria vectors have developed resistance to these insecticides and the resistance alleles are spreading at an exceptionally rapid rate throughout Africa. A...

Spinosad is a new and highly promising insecticide with efficacy against a wide range of insects, including houseflies. Selection of the field collected houseflies produced a highly spinosad resistant (>150fold) strain of housefly following 10 generations of selection. Spinosad resistance was a recessive trait linked to autosome 1 which could not be overcome with the insecticide synergists pipe...