Priophorus brullei

Priophorus brullei is a species of sawfly belonging to the family Tenthredinidae in the order Hymenoptera. This insect is recognized as a significant pest of various berry crops, particularly raspberries and blackberries. Its presence can be detrimental to plant health and fruit production, making it a subject of concern for both home gardeners and commercial growers.

The life cycle of this sawfly typically involves a single or multiple generations depending on climatic conditions. The adult females lay their eggs within the leaf tissue. Once the larvae emerge, they feed gregariously or individually on the foliage. These larvae are often referred to as false caterpillars and can be distinguished by their specific feeding habits on berry bushes.

The primary damage caused by Priophorus brullei consists of leaves being consumed, often resulting in skeletonization or large, irregular holes. Severe infestations can lead to significant defoliation, which stresses the plant, reduces the size of the berries, and hampers the development of buds for the following growing season.

The overwintering stage usually occurs in the soil, where the larvae form protective cocoons. As spring temperatures rise, the insects pupate and eventually emerge as adults to start the new cycle. Understanding this timing is critical for effective management, as it allows for the intervention before the population reaches an economic threshold.

Effective control measures include both physical and chemical strategies. Cultivating the soil beneath the bushes in late autumn can help disrupt the overwintering pupae. For active infestations, chemical intervention using registered insecticides is an option, provided that the timing aligns with local regulations to ensure safety for pollinators and fruit consumers.

• Cultural practices: Pruning and soil cultivation.
• Biological control: Encouraging natural predators and parasitoids.
• Chemical control: Targeted application during the larval stage.