EVALUATION OF HEIRLOOM SWEET POTATO CULTIVARS FOR RESISTANCE TO SOIL INSECT PESTS, 2011

Genetic engineering of rice for resistance to homopteran insect pests

The rice brown planthopper (BPH; Nilaparvata lugens) is a serious pest of rice crops throughout Asia, damaging plants both through its feeding behavior and by acting as a virus vector. Like many homopteran pests of crops, it is primarily a phloem feeder, abstracting sap via specially adapted mouthparts. An artificial diet bioassay system for this pest was developed to allow the effects of poten...

IdentiWcation of molecular markers associated with sweet potato resistance to sweet potato virus disease in Kenya

Sweet potato virus disease (SPVD), a result of the co-infection of whiteXy transmitted Sweet potato chlorotic stunt virus (genus Crinivirus, family Closteroviridae) and the aphid transmitted Sweet potato feathery mottle virus (genus Potyvirus, family Potyviridae), is the most destructive disease of sweet potato in East Africa. A study was conducted to establish if genotypes identiWed as resista...

Tests of Taxonomic and Biogeographic Predictivity: Resistance to Disease and Insect Pests in Wild Relatives of Cultivated Potato

A major justifi cation for taxonomic and biogeographic research is its assumed ability to predict the presence of traits in a group for which the trait has been observed in only a representative subset of the group. Such predictors are regularly used by breeders interested in choosing potential sources of disease and pest resistant germ plasm for cultivar improvement, by genebank managers to or...

مقاومت تعدادی از ارقام تجاری و ژنوتیپ های سیب زمینی نسبت به بید سیب زمینی، phthorimaea operculella (zeller) resistance of some potato cultivars and genotypes to the potato tuberworm, phthorimaea operculella (zeller)

abstract: the potato tuberworm, phthorimaea operculella (zeller), is an important insect pest of potato (solanum tuberosum l.) in the storage and field in most parts of the world especially in tropical and subtropical regions due to its close relationship with the host, high reproductive potential and high economic losses. information on host preference, life table parameters and digestive en...

Evaluation of six cotton cultivars for their resistance to thrips and leafhoppers