If damage to rose foliage doesn’t start until the end of June or beginning of July, adult Japanese beetles are probably the cause. Whitney Cranshaw, Colorado State University, Heavier infestations may warrant the application of a registered insecticide such as insecticidal soap or spinosad. ![]() Small numbers of roseslugs can be hand-picked from leaves and either squished or drowned in a bucket of soapy water. ![]() Since roseslugs can cause significant aesthetic damage and have the potential to reduce plant vigor if left unchecked, monitoring for them in the spring is essential. They are most often found on the undersides of foliage, which is where you should look when scouting. Roseslugs themselves are smooth with yellowish-brown heads and translucent yellowish-green bodies. As the larva continue to develop, they are capable of chewing larger holes in leaves, eating everything but the mid-rib. This transparent layer of tissue eventually turns brown. Roseslugs are a type of sawfly larva which feed gregariously on rose foliage, eating the tissue between veins and giving leaves a window-pane-like appearance. May and June is the time to watch out for a pest called roseslug. Keeping roses free of feeding damage involves close observation, careful monitoring, and a basic understanding of the most important and common insect pests. Although some of the most serious disease problems can be avoided by planting resistant varieties, such as those in the Knock-Out or Easy Elegance series, insect pests aren’t so easily eluded. Not only do they require specific growing conditions, pruning, and winter protection, but they are also plagued by a long list of insect and disease pests. ![]() Roses have a reputation for being tricky to grow.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |