Apple dimpling bug

Systematic position: Campylomma livida belongs to the order Hemiptera and the family Miridae. Known commonly as the apple dimpling bug, this species is a significant pest in various fruit-growing regions, recognized for its subtle presence and cryptic behavior.

Host crops: This insect is a polyphagous pest, meaning it feeds on a wide range of plants. It is particularly damaging to pome and stone fruits, including apples, pears, peaches, and nectarines. It can also colonize ornamentals and various wild host plants that serve as reservoirs for re-infestation.

Biology and life cycle: The lifecycle consists of eggs, five nymphal instars, and adults. Multiple generations occur throughout a single growing season. The species typically overwinters in the egg stage, with eggs embedded into the woody tissues of twigs or near buds, ensuring survival through the dormant season.

Damage symptoms and harmfulness: Damage is primarily caused by both nymphs and adults feeding on developing fruitlets. As they feed, they inject enzymes that cause the cells to die, leading to corky spots and deep dimpling or pitting on the mature fruit. This significantly depreciates the market value of the produce.

Control measures: Management relies on integrated pest management (IPM) strategies. This includes regular monitoring with white or yellow sticky traps to determine population density. Chemical control with selective insecticides is applied during critical stages of fruit development. Maintaining biodiversity in the orchard helps encourage the presence of predatory insects that naturally suppress populations.