Eighty yellow mongooses, Cynictis penicillata, from five localities in South Africa were examined for arthropod parasites. Ten ixodid tick species, of which Haemaphysalis zumpti was the most abundant, prevalent and widely distributed, were collected. The mongooses were also infested with two mite species. Echidnophaga gallinacea was the most abundant of the eight flea species collected. It and ...

use of irradiation has long been proved to be effective in inducing new T z n e t i c variability in a quantitative trait. SCOSSIROLI (1954) irradiated D ~ o sophila mlanogaster populations that had ceased to respond to selection for sternopleural bristle. The irradiated populations now responded to further selection: the response to upward selection was remarkably high, while that to downward ...

The alkaloid fuyuziphine was isolated from the whole plant of Fumaria indica. It had inhibitive effect against spore germination of some plant pathogenic fungi (Collectotrichum sp., C. gloeosporioides, C. falcatum, Curvularia maculans, C. lunata, Erysiphe cichoracearum, Helminthosporium pennisetti, Oidium erysiphoides, Ustilago cynodontis, Alternaria chieranthi, A. melongenae, A. brassicicola a...

An allosecurinine alkaloid was assayed against spore germination of some saprophytic and pathogenic fungi e.g., Alternaria alternata, A. solani, A. brassicicola, A. brassicae, Curvularia lunata, C. pallescens, C. maculans, Curvularia species, Colletotrichum species, C. musae, C. gloeosporioides, Erysiphe pisi, Fusarium udum, Helminthosporium echinoclova, H. pennisetti, H. spiciferum, and Hetero...

abstract polymyxa betae is an obligate parasite and has a worldwide distribution. this fungus is a soil-borne root endoparasite in some plant families such as portulaceae, chenopodiaceae and amaranthaceae. this fungus is the vector of many plant viruses such as beet necrotic yellow vein virus (bnyvv) which causes the disease known as rhizomania. bnyvv is the most economical important viral dise...