Catantops melanostictus

Systematic position: Catantops melanostictus (Schaum, 1853) belongs to the order Orthoptera, family Acrididae (short-horned grasshoppers). This species is widely recognized as a significant agricultural pest in various regions of sub-Saharan Africa, frequently associated with habitat disturbances and agricultural landscapes.

Crops attacked: The species is highly polyphagous, meaning it feeds on a diverse range of botanical families. Primary targets include important staple cereals such as maize, sorghum, and pearl millet. It also poses a threat to legumes, vegetables, and cash crops like cotton and cocoa, significantly impacting regional food security.

Biology and life cycle: The life cycle comprises eggs, several nymphal instars, and adults. Eggs are typically deposited in soil during the wet season. Nymphs undergo rapid development, with their growth rate heavily dependent on environmental temperature and food availability. The species can often produce multiple generations per year under favorable tropical conditions.

Nature of damage and economic importance: Both nymphs and adults are voracious defoliators. They consume large portions of leaf tissue, often leaving only the midribs and thicker veins intact. In cases of high population density, these insects can cause complete strip-mining of field crops, leading to total yield loss and failure of sensitive cultivars.

Control measures: Managing Catantops melanostictus requires an integrated pest management (IPM) strategy:

• Deep plowing and soil cultivation to disturb and destroy egg pods in the soil.
• Biological control using fungi such as Metarhizium anisopliae.
• Application of targeted insecticides when populations exceed established economic thresholds.
• Maintaining field hygiene by clearing weeds that may serve as alternative host plants or refugia.