Clusters Of Spiky Black Caterpillars Are Defoliating Iowa Walnut Trees Before Dropping To The Ground
You hear it before you see it, a dry rustle drifting down from branches. Look up, and the whole canopy looks strangely thin for late summer. Crowds of caterpillars travel in a dense, shifting mass. Iowa homeowners swear rain is falling on a bone dry porch. Branches thin out fast, and nobody saw it coming….
