Alpine Currant infested by root weevils -- chemical treatment available?
Hello, Every year, my currant bush is infested by root weevils (leaves have notches in them). Is there any effective chemical treatment I can use to destroy the weevils? Thanks
Deschutes County Oregon
Hi, Root weevils are tough insect to manage. Chemical control for the larvae can be different than that for the adult. Here is a link to the pest and some different options on how to successfully manage. Beneficial nematodes can be successful but fall is the best time to apply. https://pnwhandbooks.org/insect/hort/landscape/common/landscape-root-weevil
Tables 2 and 5 You can try a pyrethrin or pyrethoid, but follow all label directions and avoid spraying when in bloom. https://pnwhandbooks.org/sites/pnwhandbooks/files/insect/horticultural-landscape-ornamental/content/pdf/pdfs/landscape-chem-control.pdf