Raspberry moth

Systematic position: The raspberry moth (Incurvaria zinckenii) belongs to the order Lepidoptera and the family Incurvariidae. It is a specialized pest that specifically targets raspberry bushes, causing significant concern for berry growers.

Crops damaged: The primary host plant for this species is the raspberry (Rubus idaeus). It infests the fruits directly, often causing hidden damage that reduces the marketable quality of the harvested produce.

Biology and life cycle: The insect typically completes one generation per year. Larvae overwinter in cocoons located in the soil or under leaf litter. In the spring, they migrate to the shoots. Adults emerge during the flowering period to lay eggs inside the blossoms, leading to larvae infestation in the developing fruit.

Damage symptoms and pest importance: Larvae tunnel into the ripening berries, feeding on the drupelets. This leads to fruit deformation, premature dropping, and increased susceptibility to fruit rot. High population levels can result in substantial yield losses, especially in early-ripening varieties.

Control measures:

• Cultivating the soil around the base of the bushes in autumn and spring to disturb overwintering larvae.
• Promptly gathering and destroying fallen, infested berries to disrupt the lifecycle.
• Applying authorized insecticides during the pre-blooming stage to prevent egg laying.
• Implementing integrated pest management practices to maintain healthy plant growth.