Liriomyza sativae and L. trifolii are highly invasive leafminer pests of vegetable crops that have invaded southern China in recent years. Liriomyza sativae was the first of these species to invade China, but it is now being displaced by L. trifolii. The rate and extent of this displacement vary across southern China. In Hainan, monocultures of highly valuable cowpea are planted and treated ext...

Body size of many animals increases with increasing latitude, a phenomenon known as Bergmann's rule (Bergmann clines). Latitudinal gradients in mean temperature are frequently assumed to be the underlying cause of this pattern because temperature covaries systematically with latitude, but whether and how temperature mediates selection on body size is unclear. To test the hypothesis that the "re...

In the tropics, cowpea is often intercropped with maize. Little is known about the effect of the intercropped maize on N2-fixation by cowpea or how intercropping affects nitrogen fertilizer use efficiency or soil N-uptake of both crops. Cowpea and maize were grown as a monocrop at row spacings of 40, 50, 60, 80, and 120 cm and intercropped at row spacing of 40, 50, and 60 cm. Plots were fertili...

Five greenhouse-grown cowpea [Vigna unguiculata (L.) Walp] cultivars were tested in a generalized random complete-block design to determine the effect of early leaf harvest on dry weight and protein concentration of plant parts at maturity. The most recent, fully expanded leaves on each branch from one group of plants were harvested at 5 and 7 weeks after planting. On the other groups of plants...

Cowpea (Vigna unguiculata (L.) Walp.) is a legume cultivated and consumed in the Central African Republic. Few studies have been carried out on cowpea For this reason, four local accessions (Kahkir, Gbarah, Aie-toung Bambalassa) collected different localities were evaluated at three sites. Yield squares laid according to randomized block design with replications. These selected basis of quantit...

A field experiment entitled “Effect of nitrogen and zinc on summer cowpea (Vigna unguiculata L. Walp) under south Gujarat condition” was carried out during 2019 at College Farm, N. M. Agriculture, Navsari Agricultural University, (Gujarat). The comprising sixteen (16) treatment combinations were laid in randomized block design with factorial concept three replications. consisted 4 level viz., Z...

Inbreeding depression is well documented in insects but the degree to which inbreeding depression varies among populations within species, and among traits within populations, is poorly studied in insects other than Drosophila. Inbreeding depression was examined in two long-term laboratory colonies of the seed beetle, Callosobruchus maculatus (Fabricius), which are used frequently as models for...

Background: Ricebean [Vigna umbellata (Thunb.) Ohwi and Ohashi] is an important food legume grown in Nagaland, India. It a versatile underutilized pulse crop as dry also used green manure fodder. Insect pests are one of the major constraints encountered beetle, [Callosobruchus chinensis (L.)] pest that causes considerable damage to Vigna seeds. This experiment was carried out determine basis re...