Forest Insect & Disease Newsletter

July 2022

Maple leaves showing irregular dark blotches caused by anthracnose.

Forecast: cool, wet, and spotty

Common spring leaf disease explained. 

Symptoms of introduced basswood thrips on basswood.

Leaf symptoms on basswood in northern Minnesota

Meet the tiny critter responsible for cupped leaves.

Aspen seeds on tree

Prolific seed crops and sparse tree crowns observed on aspen and maple

Snow in June or aspen seeds?

Oak damaged in June storm

When it rains, it pours: Early-season storms may aid the spread of oak wilt

Oak wilt could run rampant this year.

pine forest

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