Chlorotic Spotting of Black Raspberry Induced by the Feeding of Amphorophora rubitoxica Knowlton

Abstract

A chlorotic spotting of the foliage of black raspberry (Rubus occidentalis L.) is widespread in the coastal regions of British Columbia. The spotting first appears in June and new spots continue to develop during July and August. By mid-July, spotting occurs on virtually all plants, although its incidence varies considerably and, on some plants, only a few leaflets are affected.