Leaf-eating weevil

The genus Myllocerus belongs to the order Coleoptera and the family Curculionidae. These small beetles often possess cryptic coloration that allows them to blend in with foliage, providing effective camouflage. Systematically, they are placed within the subfamily Entiminae, which is notorious for containing highly polyphagous species capable of causing significant economic losses to various plants.

This pest affects a vast array of agricultural and ornamental crops. Common hosts include cotton, citrus, legumes, mango, coffee, and tea, among others. The adult beetles feed primarily on leaves, which poses a serious threat to the productivity of plantations and field crops, particularly in tropical and subtropical agricultural ecosystems.

The biology of Myllocerus involves a complete metamorphosis. Females lay eggs either in the soil or on the surface of leaves. The larvae, which are typically soil-dwelling, feed on the roots of host plants. This larval feeding phase is particularly dangerous because it often goes unnoticed until the host plant shows signs of severe stress or stunted growth due to impaired nutrient uptake.

Damage symptoms typically include the characteristic "notching" of leaf margins, caused by adult feeding. Under high population densities, the pest can cause extensive defoliation, severely impacting the plant's photosynthetic capacity and overall yield. Larval feeding on roots further compounds the problem, potentially leading to the death of young seedlings and weakened plants.

• Application of contact or systemic insecticides during peak beetle emergence.
• Implementation of crop rotation to break the life cycle of soil-dwelling larvae.
• Use of biological control agents, such as entomopathogenic fungi.
• Manual removal of adults in small-scale farming during early morning hours.
• Rigorous weed control to eliminate alternative hosts and breeding grounds.