Back to How to identify viburnum leaf beetles
Logo images by Kent Loeffler, Paul Weston & Craig Cramer
In early to mid-June, when larvae reach about 10 to 11 mm long, the they crawl down the shrub, enter the soil, and pupate. This is a non-feeding stage between larvae and adult where the pupae develop within a cocoon, similar to the lifecycle of butterflies.
Pupae are very hard to find. They need moist soil. If it's too wet or too dry, the pupae don't seem to survive as well.
In early July, the adult beetles emerge from the soil and start feeding on viburnum foliage.
Larger image. Photo by Paul Weston
Pupae live briefly in the soil and are difficult to spot.
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