Tragocephala maynei

Tragocephala maynei is a species of longhorn beetle belonging to the family Cerambycidae, order Coleoptera. This insect is a recognized agricultural pest in tropical regions of Africa, where it causes significant damage to woody stems and branches of various commercial crops.

The host range of this pest mainly includes plants from the Malvaceae and Rubiaceae families. It is particularly notorious for its destructive impact on cocoa (Theobroma cacao) and coffee (Coffea spp.) plantations, representing a serious threat to farmers in tropical agro-ecosystems.

The biology of the pest involves larvae tunneling into the woody parts of the plant. Adult beetles feed on the bark of young shoots, causing initial damage. Females deposit eggs into slits made in the bark. Once hatched, the larvae bore into the stems, disrupting the vascular system of the plant and hindering the transport of water and nutrients.

Symptoms of infestation include the wilting and subsequent death of the upper portions of branches. The tunnels carved by the larvae weaken the structural integrity of the stems, leading to breakage and branch collapse. Severe infestations can significantly reduce plant vigor and lead to total yield loss in young saplings.

• Regular pruning and destruction of infested branches to eliminate larvae.
• Application of contact or systemic insecticides during the peak activity of adult beetles.
• Use of light traps or pheromone monitoring to track population levels.
• Maintaining healthy growth conditions to help plants withstand and recover from light infestations.

Effective management of Tragocephala maynei requires diligent field scouting and strict sanitation practices. By removing infested material before the adults emerge, growers can significantly reduce the pressure of this pest and protect the economic viability of their coffee and cocoa plantations.