Mango leafhopper

Systematic position. The genus Idioscopus belongs to the order Hemiptera and the family Cicadellidae. These insects are commonly known as leafhoppers and are recognized as significant pests of various tropical and subtropical fruit trees, particularly in mango-growing regions.

Host plants and pest status. The primary host for this pest is the mango tree (Mangifera indica). Idioscopus species feed on the phloem sap of mango leaves, tender shoots, and inflorescences. Heavy infestations during the flowering stage are particularly devastating, causing premature fruit drop and severe yield reductions.

Biology and life cycle. The life cycle consists of the egg stage, five nymphal instars, and the adult stage. The insects typically overwinter as adults or nymphs in the bark crevices or sheltered parts of the canopy. Depending on temperature and humidity, the life cycle completes in approximately 3 to 4 weeks, allowing for multiple generations per season.

Nature of damage. Beyond the loss of plant sap, Idioscopus excretes large amounts of honeydew. This sugary substance promotes the growth of sooty mold (Capnodium spp.), which covers the leaves and panicles in a black fungal layer. This layer restricts photosynthesis, significantly weakening the tree's health and reducing fruit quality.

Control measures. Integrated pest management (IPM) is crucial. Recommended practices include:

• Regular pruning to improve canopy aeration.
• Application of systemic insecticides like imidacloprid during the pre-flowering stage.
• Monitoring populations using sticky yellow traps.
• Encouraging natural predators such as lady beetles and spiders in the orchard.