Time to act:
Jun, Jul, Aug, Mar, Apr, May
The rose leaf rolling sawfly injects a chemical into young rose leaves to cause them to curl protectively around her eggs. Within a week the eggs hatch into green caterpillars that start to eat their home. In mid-summer, leaving behind skeletonised foliage, they crawl down into the soil to overwinter.
Young rose leaves nearest the bud curl up overnight; after a week, small green caterpillars hatch and start to strip the leaves.
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