Forest Insect & Disease Newsletter - July 2020 Having trouble viewing this email? View it as a Web page. Forest Insect & Disease Newsletter July 2020 Red pine shoot moth outbreak We haven't seen an insect outbreak like this on pine for many years. Some Minnesota trees now dwelling in drought Drought brings potential for early leaf drop and other stress symptoms. Effects of past flooding common on trees this year Past flooding and tree dieback seen in central and southern Minnesota forests. Update on forest tent caterpillar and spruce budworm How prevalent have two native caterpillars been this year? Stop oak wilt in Cass and Crow Wing Report suspected oak wilt on red oaks in Cass and Crow Wing counties. Herbicide damage to trees Herbicide damage to trees and possible look-alikes. Sawflies What is that chewing on smaller pine and spruce trees? Maple velvet erineum galls Noticing any colorful, velvety patches on maple leaves?