Sparganothis leafroller

Systematic position of this pest belongs to the order Lepidoptera, family Tortricidae. The genus Sparganothis is known for several species that act as significant agricultural pests. The most notable representative, Sparganothis pilleriana, is a major threat to viticulture and fruit production globally.

Host plants are diverse, including grapevines, various fruit trees, berry bushes such as strawberries and raspberries, and some invasive weeds. The polyphagous nature of these moths allows them to thrive in diverse agricultural environments, making them a persistent challenge for commercial growers.

Biology and life cycle typically involve one generation per year. The insect overwinters as young larvae within protective silk cocoons located under bark or in crevices. With the onset of spring warmth, the larvae emerge to feed on developing buds and young foliage, progressing to the reproductive parts of the plants as the season advances.

Damage and pest status are characterized by the destruction of buds, flowers, and leaves. By webbing plant parts together with silk, larvae create protected feeding chambers. This damage often leads to stunted growth, loss of fruit set, and increased vulnerability of the plant to secondary pathogens, significantly impacting the final crop yield.

Control measures should be integrated into a pest management plan. Cultural practices like bark removal and weed control are essential for reducing overwintering sites. Chemical control involves the timely application of insecticides during the larvae emergence phase, as well as the use of pheromone traps to time treatments accurately.

• Monitoring with pheromone traps for flight detection.
• Mechanical removal of damaged leaves and webbing.
• Application of selective insecticides during bud burst.
• Encouraging natural predators and parasitoids in the orchard.