In a 2003 pot planting in a glasshouse, similar treatments gave a reduction of 5.2, 5.4 and 0.8 larvae/20 plants, respectively, compared to the control where 26.2 larvae/20 plants were recovered. When the black vine weevil (Otiorhynchus sulcatus), a foe to a wide variety of garden plants, makes an appearance in your landscape, it is time to snap into action. For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu. Several species have been reported to be effective. It is the immature larvae forms that cause the damage, rather than the adult beetles. Copyright © 2020 Elsevier B.V. or its licensors or contributors. How Did I Get Black Vine Weevils? The most distinctive feature of weevils is the shape of their head. Adults feed at night, damaging plants as they chew small notches in the edges of leaves. Adult powder-post beetles are generally 4-5 mm long and range in colour from light brown to reddish-brown. Adult beetles usually emerge from the infested wood between May and September, with bore holes 1.5mm to 2mm in diameter. Both potted and field strawberries were artificially infested with BVW larvae. We are seeing them regularly in the house. You should look to remove the woodlice, and also treat the factors causing the woodlice to become attracted to your home. They are flightless. Adult female black vine weevil (Coleoptera). The bread, also known as the biscuit beetle or drugstore beetle, is one of the commonest pest insects of stored food. They are small, between 2-4 mm in length, and reddish-brown. Larvae cause the greatest level of injury to plants. Repeat at least twice at two week intervals. A few weevils attack stored grains and seeds. 1. Many are slender or oval-shaped insects. Appearance What Do They Look Like? Otiorhynchus sulcatus I think. Depending on the species, weevils range in … Pesticides registered for use include acephate (Orthene). The abdomen is quite rounded and in when viewed in profile, the weevil’s short snout can be easily seen. As plant pests, their larvae live in the soil and eat roots, while the adults feed on foilage.
The Museum offers a free identification service for the public, and also a commercial service for businesses. As the yellowish white or pinkish larvae feed they cover foodstuff with webbing - often the first indication of an infestation. https://doi.org/10.1016/j.biocontrol.2006.12.009. Since adults of this insect sometimes over winter, pesticides can be applied at the first sign of feeding on new plant growth. Copyright © 2007 Elsevier Inc. All rights reserved.

The best method of controlling the weevils inside the home is to vacuum them up.