Mango gall psyllid

Systematic position. The mango gall psyllid (Calophya mangiferae) belongs to the order Hemiptera and the family Psyllidae. This insect is a host-specific pest that has evolved to survive and reproduce exclusively on species within the Mangifera genus.

Host plants. The primary and sole host for this pest is Mangifera indica (mango). It is considered a significant economic threat in major mango-producing regions across the tropical belt, where it can cause chronic stress to the trees if left unmanaged.

Biology and life cycle. The life cycle is closely synchronized with the leaf flush cycles of the host tree. Adults lay eggs on soft, young leaves. Upon hatching, the nymphs induce gall formation by injecting salivary secretions into the leaf tissue. These galls provide a protected environment for the nymphs to feed and develop through their larval instars.

Damage patterns and economic impact. The characteristic damage involves the formation of numerous raised galls on the surface of the leaves, leading to severe leaf curling and malformation. This reduction in the leaf surface area hampers the tree's photosynthetic capacity, causing stunted growth and significant losses in fruit yield and market value.

Protection measures. Managing Calophya mangiferae effectively requires a combination of monitoring and intervention:

• Early detection of gall symptoms during the vegetative growth phase.
• Pruning and destroying heavily infested branches to reduce local pest pressure.
• Application of systemic insecticides specifically timed during the leaf-flush period.
• Encouraging biological control by protecting natural predators and parasitoids.