White planthopper

Systematic position: Lawana candida is a member of the order Hemiptera and the family Flatidae. Often referred to as a white planthopper, it is a sap-sucking insect characterized by its distinct white appearance and its propensity to feed on the phloem of diverse plant species.

Host plants: This insect is highly polyphagous, meaning it feeds on a wide range of botanical hosts. It is particularly notorious for damaging plantation crops such as coffee, cocoa, and various citrus fruits, as well as many ornamental garden shrubs and tropical orchard trees.

Biology and life cycle: The life cycle of Lawana candida involves egg, nymph, and adult stages. Nymphs are particularly notable for secreting wax-like, fluffy filaments that provide camouflage and protection from predators. The insect typically reproduces rapidly in warm, humid environments, leading to overlapping generations throughout the growing season.

Damage and pest status: The primary injury is caused by the extraction of large amounts of plant sap, which stunts growth and causes leaf wilting. Furthermore, the secretion of honeydew promotes the growth of sooty mold, which coats the leaves and significantly impairs photosynthesis, leading to reduced yield and poor plant vigor.

Control measures: Managing infestations requires an integrated approach:

• Regular monitoring of canopy density and plant health.
• Physical removal and destruction of infested branches or heavily colonized plant parts.
• Judicious use of systemic insecticides during the early stages of infestation.
• Encouraging biological control agents, such as parasitoid wasps and generalist predators that prey on planthopper nymphs.