Pine froghopper

Systematic position. The pine froghopper (Aphrophora corticea) belongs to the order Hemiptera and the family Aphrophoridae. This sap-sucking insect is a specialized pest that impacts various coniferous species throughout its geographic range, primarily within temperate forest zones.

Host plants and damage symptoms. The primary hosts include species of the genus Pinus. Both nymphs and adults feed on the sap of young shoots and needles. Typical symptoms of infestation include wilting of the shoots, yellowing of needles, and localized necrotic lesions caused by the insertion of the insect's mouthparts into the plant tissue.

Biology and lifecycle. The species undergoes a hemimetabolous development. Eggs overwinter in the crevices of the tree bark. In spring, nymphs hatch and start producing the characteristic spittle mass, which provides both hydration and protection against predators and environmental stress. By mid-summer, the nymphs transition into winged adults, which are capable of jumping and flying to new host plants.

Economic impact. While often considered a secondary pest, high populations can significantly damage nursery stock and young forest plantations. The removal of nutrients by the froghoppers weakens the host plant, rendering it more susceptible to drought, subsequent pest infestations, and fungal diseases, which can lead to stunted growth or tree mortality in severe cases.

Control measures. Integrated pest management strategies are crucial for controlling Aphrophora corticea:

• Removing heavily infested or dead branches to reduce the egg-laying population.
• Applying systemic insecticides in nurseries during the early nymphal stages if infestation levels exceed economic thresholds.
• Ensuring proper forest hygiene to maintain tree health and vigor.
• Monitoring adult activity during the summer to plan for subsequent cultural control measures.