Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

A survey of infestation of crops by Striga spp. in Benin, Nigeria and Togo.

Abstract

A survey conducted between June and Oct. in 1984 and 1985 revealed that 50-100% of the 630 crop fields examined in all states/provinces of Nigeria, Benin and Togo between the latitudes 4° to 13° 30′ N, with the exception of the rainforest zone of Anambra and Oyo in Nigeria, were infested with Striga spp. (S. hermonthica, S. aspera, S. asiatica, S. gesnerioides, S. parssargei, S. brachycalyx and S. forbesii). Between 66 and 100% of maize crops were lost in Borno, Niger and Plateau States in Nigeria, and in Atakora and Borgou in Benin, due to infestation by S. hermonthica. S. aspera caused equivalent maize crop losses in Bauchi, Kwara and Niger in Nigeria, whereas S. asiatica was more prevalent in S. Benin and Togo (particularly Maritime Province). S. hermonthica also infested sorghum, upland and lowland rice, Pennisetum glaucum [Pennisetum americanum], Digitaria exilis, sesame and groundnuts. S. aspera was recorded for the first time on lowland rice in Gongola and Plateau States of Nigeria, and S. gesnerioides was found to infest Vigna unguiculata and the wild Arachis repens. Buchnera hispida, a close relative of Striga, was found growing on maize, sorghum and P. glaucum in Kaduna and Kano in Nigeria, but was not of economic significance.