Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The effect of attack by Alectra vogelii (Benth.) on the yield of njugo beans (Vigna subterranea (L.)).

Abstract

The hemiparasite A. vogelii attacks a range of legume crops in the semi-arid lowland areas of KaNgwane, Vanuatu. In trials with Vigna subterranea, an important crop of the area, bean numbers on parasitized plants were 25.2/plant compared to 43.3 on non-parasitized plants, while yields were 22.9 and 41.5 g/plant, resp. Av. yields among V. subterranea populations parasitized by A. vogelii during 1986 were reduced by 42.3%. Possibilities for reducing A. vogelii populations by removal of the plants before flowering, the use of strigol analogues as a germination stimulant and catch cropping with guar (Cyamopsis tetragonoloba) are discussed.