Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The weevil Barypithes pellucidus Boh., a small pest of strawberries.

Abstract

Barypeithes pellucidus (Boh.) is a small weevil that has been noticed causing damage to ripe strawberries in an area of western Sweden during the last 3 years. The adult weevil is briefly described and figured from work in Denmark. Its occurrence was studied in 1980 from field catches and pitfall-trap counts made weekly, in a season in which damage had been said to be less than in the previous two. The adult weevils gnaw the ripe berries and sometimes penetrate into them, especially in a wet year. The weevil is usually rare in Sweden, and the only earlier record of damage dated from 1936. However, the same or similar species have been recorded on strawberries in other northern countries, and B. araneiformis (Schr.) is apparently known in England. The distribution of B. pellucidus in Sweden is discussed from the results. The biology of the weevil is little known. The larvae appear to live on the roots of various wild plants, and adult females trapped in late June contained ripe eggs. The oviposition period thus may coincide with the picking season of strawberries. Insecticides obviously cannot be used during the ripening and picking period, but if weevil numbers are excessive sprays could be applied before flowering or immediately after picking.