Mulberry psyllid

The Mulberry psyllid (Anomoneura mori) is a significant agricultural pest belonging to the order Hemiptera and the family Psyllidae. This insect specializes in feeding on the foliage of mulberry trees (Morus spp.), causing considerable economic damage in sericulture-intensive regions by compromising the quality and quantity of leaves required for silkworm rearing.

The host range of Anomoneura mori is restricted to the genus Morus. By piercing the leaf tissue with their specialized mouthparts, both nymphs and adults extract sap, which causes the foliage to curl and deform. The psyllid is highly prolific, and under favorable conditions, several generations per year can occur, leading to severe infestations on mature plantations.

The life cycle of the pest consists of an egg stage, five nymphal instars, and the adult stage (imago). The psyllid typically overwinters as an adult, hiding in bark crevices or protected plant debris. As soon as temperatures rise in the spring, the overwintered adults migrate to the emerging mulberry buds to begin the first cycle of reproduction for the season.

The damage caused by the mulberry psyllid is twofold. Beyond the direct depletion of plant nutrients, the insects secrete honeydew, which serves as a substrate for the growth of sooty mold. This fungal layer blocks sunlight, severely reducing the photosynthetic capacity of the leaves, which in turn leads to leaf chlorosis, stunted growth, and a reduction in the overall vigor of the mulberry tree.

Effective management strategies for controlling Anomoneura mori include the following steps:

• Timely application of systemic insecticides during the early spring to target overwintered adults.
• Good orchard hygiene, including the removal and destruction of infested leaf litter and twigs.
• Monitoring population densities using yellow sticky traps to determine the optimal timing for intervention.
• Encouraging and maintaining populations of natural enemies, such as lady beetles and lacewings, which act as biological control agents.