Landscape Integrated Pest Management

The willow rosette gall is caused by a tiny midge called Rabdophaga rosaria. The adult lays her eggs in new willow shoots, halting shoot-length growth, and causing a proliferation of leaves laterally. The result looks like the flower of a rose. The small developing larva feeds on the proliferation of growth. It pupates within the gall and emerges in spring.

The following links provide helpful information, images, and updates on ornamental plant pest and disease control.

Insect and Disease Information

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IPM Advisory - Landscape

IPM Advisory - Turf

Slideshows - Landscape Ornamentals

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