Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

New information on Mussidia nigrivenella Ragonot (Lepidoptera, Pyralidae) in Togo.

Abstract

Observation of the damage caused by Mussidia nigrivenella on maize cobs and cotton bolls begun in Togo in 1988 was continued in 1990-91. The study was conducted at IRCT's Anié-Mono station at the Dalanda, Notsé and Kouvé test and on small holdings in the Notsé region. M. nigrivenella is the main pest on maize (over 90% of larvae observed). Larval populations of M. nigrivenella were higher in 1991 than in the previous year, owing to favourable climatic and cropping conditions. On immature cotton bolls, Cryptophlebia leucotreta remained the dominant species. The activity of M. nigrivenella on mature bolls was revealed for the 1st time. In certain locations, over 90% of larvae and chrysalids observed attacking mature bolls belonged to this species. Thus, cotton plants which are not destroyed after harvest can act as reservoirs for pyralid pests.