The banana (Musa spp.) weevil (Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) is a major pest in East Africa causing yield losses of up to 14 metric tonnes per hectare annually. Laboratory and field experiments were conducted to determine whether the response of the banana weevil, Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) to its aggregation pheromone was influenced ...

A community of frugivorous weevils was studied by quantitative rearing of 57 weevil species represented by 10 485 individuals from 326 woody plant species in lowland rain forest in Papua New Guinea. Only fruits from 35% of plant species were attacked by weevils. On average, weevils were reared from only 1 in 33 fruits and 1 kg of fruit was attacked by 2.51 individuals. Weevil host specificity w...

The cowpea weevil (Callosobruchus maculatus) is the main pest that attacks (Vigna unguiculata) seeds during storage, causing nutritional and economic losses in crop. Thus, studies aiming to identify resistant cultivars have been developed. Chitin-binding proteins (CBP), such vicilins chitinases, detected related with toxicity insects. In this work, we investigated presence of chitin-binding par...

ABSTRACT Cowpea (Vigna unguiculata) is an economically and nutritionally important crop. However, cowpeas are subject to attack by insect pests that reduce the quality nutritional value of grains during storage. The use plant-based products as alternative control has been highlighted for their low toxicity on environment human health. This study aimed evaluate bioactivity different plant extrac...

Protection of spruce seedlings against pine weevil attacks by treatment of seeds or seedlings with nicotinamide, nicotinic acid and jasmonic acid. Access to the published version may require subscription.

Advances in mass-production and formulation technology of entomopathogenic nematodes, the discovery of numerous isolates/ strains and the desirability of reducing pesticide usage have resulted in a surge of scientific and commercial interest in these nematodes. The lessons learned from earlier problems have encouraged scientists and leading commercial companies to increase their efforts toward ...

Field parasitism rates of the Argentine stem weevil Listronotus bonariensis (Kuschel; Coleoptera: Curculionidae) by Microctonus hyperodae Loan (Hymenoptera: Braconidae) are known to vary according to different host Lolium species that also differ in ploidy. To further investigate this, a laboratory study was conducted to examine parasitism rates on tetraploid Italian Lolium multiflorum, diploid...

the species of larinus spp. feed on developing achiness of flowerhead of plants in the family asteraceae and cause decrease in seed production of these plants. in this study, the life cycle parameters of the weevil larinus affinis fremuth on echinops aucheri boisswere studied in kerman under natural conditions during 2010 and 2011. this weevil overwintered as adults under ground litter. the fem...

the sugar beet weevil, lixus incanescens boh., is an important insect pest of sugar beet, beta vulgaris l., in razavi khorasan province. in this research, population densities of the sugar beet weevil eggs and larvae were evaluated on plants of six sugar beet cultivars including ardabili, aras, persia, flores, laetitia and rosire in an experimental field in 2011 and 2012. also, the percentage o...