Dusty looking spruce, arborvitae, boxwoods and rhododendrons in the fall could be signal the presence of cool season spider mites.
Eliminate stinging threats from ground nesting wasps by treating them at night when they are all tucked in their nests.
Control spider mites by mechanical control and improving conditions for predators and fungi. If needed, follow up with pesticides to rescue ailing plants.
Protect flowers from caterpillars through early detection and selective pesticides
Timing of defoliation, health, and type of tree influences the likelihood of recovery and survival
Now is the time to look for Japanese beetle injury to see if action is needed to protect your plants.
Scale insects are difficult to manage because their waxy or sticky covering protects them from insecticides. Learning about their life cycle can help you protect your plants.
As we move into summer it is time to be on the lookout for Japanese beetles. They are already being reported by Indiana Nursery Inspectors in Southern Indiana. Continued warm weather and precipitation should bring them out throughout the rest of the state over the next few weeks. See our bulletin Japanese Beetles in the Urban Landscape for tips on controlling them without killing pollinators.
After surveying 72 sites across Indiana and Illinois in the coldest part of our states where bagworms are found, we determined that while many bagworms were killed, enough survived to keep bagworms near the top of our landscape problem list. NOW is the time to inspect your plants for bagworms. For details on the cold snap and how to control bagworms see this article in the February issue of the Purdue Landscape Report. https://www.purduelandscapereport.org/article/824/
Boxwood leafminer damage is widespread. It’s not too late to protect boxwoods from boxwood leafminer and protect pollinators.