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Horticulture and Home Pest News
Horticulture & Home Pest News is filled with articles on current horticulture, plant care, pest management, and common household pests written by Iowa State University Extension specialists in the Departments of Entomology, Horticulture and Plant Pathology.

Resources for Frequently Asked Questions

This article was published originally on 10/11/1996

Overwintering Geraniums

  • Horticulture and Home Pest News, September 16, 1994, pages 140 and 141

Winter Protection For Roses

  • Horticulture and Home Pest News, November 11, 1994, pages 154 and 155

When Is It Too Late To Treat For White Grubs?

Although white grub insecticides will be effective as long as the soil temperature stays above 50F, monitoring for grub location is a better indication of application timeliness. Pull back the grub-damaged turf and look for the grubs. If they are still present in the upper root zone (just under the thatch), they have not yet begun to move deeper into the soil, and treatment will be effective. In general, grubs move below the root zone in preparation for winter by late October.

White grub problems appear to be much fewer than in the recent past, with very few reports of severe damage.
Year of Publication: 
1996
Issue: 
IC-475(24) -- October 11, 1996