The aim of this study was to investigate the influence of volatile compounds from four secondary host plants on the ability of Dinarmus basalis Rond. (Hymenoptera: Pteromalidae) to locate, recognize, and parasitize its host, 4(th)instar larvae or pupae of Callosobruchus maculatus F. (Coleoptera: Chrysomelidae). To examine this, strains of D. basalis were transferred from cow-pea seeds (Vigna un...

Cowpea planting season is crucial for high yield and should comprise the period of year that warrants best climatic conditions cowpea cultivation. Thus, objective this study was to evaluate influence water availability temperature on performance cultivars. A greenhouse experiment conducted using a 4 × 2 5 factorial arrangement, with four replications. Factors included levels soil moisture (25, ...

I report on the attraction of the white pine cone beetle, Conophthoru.s coniperda (Schwarz) (Coleoptera: Scolytidae), to traps baited with the host monoterpene limonene in western North Carolina. Both (+)- and (-)-limonene attracted male and female cone beetles to Japanese beetle traps in an eastern white pine, Pinus strobus L., seed orchard near Murphy, NC. Catches of cone beetles were directl...

Although there is increasing interest in the effects of habitat disturbance on community attributes and the potential consequences for ecosystem functioning, objective approaches linking biodiversity loss to functional loss are uncommon. The objectives of this study were to implement simultaneous assessment of community attributes (richness, abundance and biomass, each calculated for total-beet...

In the present investigation, 14 cowpea genotypes including four checks were evaluated for yield and attributing traits in six different locations. Pooled analysis of variance revealed that mean sum squares due to (G) environments (E) significant all characters studied which provided sound evidence validity experiments. The genotype GC 1602 had desirable stability parameters both days 50% flowe...

The East Palaearctic seed beetle Bruchidius terrenus (Coleoptera: Chrysomelidae: Bruchinae) is recorded for the first time to the Bulgarian fauna. Larvae of the bruchid infest mature seeds of introduced mimosa Albizia julibrissin (Fabacea), an ornamental tree in many countries. The level of damage on seeds caused by bruchid larvae was examined.

Studies on physical induced mutagenesis, gamma rays were performed by exposing the healthy and dry seeds of cowpea variety CO 4 to gamma rays 20, 30, 40, 50, 60 and 70 kR. The study was to evolve economically important mutants with varied seed coat colour as against dark grey coloured seed coat of CO 4. The LD50 value was found at 50kR for 60 Co gamma rays. Under field conditions, germination, ...