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Rhonda J. Ferree

Rhonda J. Ferree
Former Extension Educator, Horticulture

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Rhonda Ferree's ILRiverHort

Rhonda Ferree's Horticulture Blog
Japanese Beetles

White Grubs by Dr. Phil Nixon on 8-15-17

Originally published in Home, Yard, and Garden Newsletter on 8-15-17 Japanese beetles and masked chafer adults are attracted to moist soils and, apparently, to green grass to lay their eggs. In years when rainfall is abundant, nonirrigated (as well as irrigated) turf stays green and attractive to egg-laying female beetles. As...

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July 2017 White Grubs Update by Dr. Phil Nixon

Issue 10 , July 5, 2017  Illinois Pesticide Review Newsletter White Grubs ShareThis This is a good time to observe the abundance and activity of white grub adults. This kno...

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2017 Japanese Beetle Update by Dr. Phil Nixon

Issue 9 , June 26, 2017 Illinois Pesticide Review Newsletter Japanese Beetle ShareThis Adult Japanese beetles have emerged in Illinois. Early control reduces damage throug...

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Masked chafer - adult form of white grub

Japanese Beetle Look Alikes

For pictures, go to this Minnesota Extension Factsheet PLEASE NOTE: Control recommendations for Illinois may vary than those given for Minnesota. ANNUAL WHITE GRUBS Annual white grubs, the larvae of the southern masked chafer (Cyclocephala lurida) pass through one generation each year....

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Japanese beetles...Home, Yard, & Garden Newsletter article from 6-27-16

Original article found at Adult Japanese beetles have been reported in southern, central, and northern Illinois. Early control reduces damage through the six weeks that they are actively feeding as beetles are attracted to previous feeding damage. Japanese beetles feed on the upper leaf surface, eating through the epidermis and meso...

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Home, Yard, & Garden Newsletter article from 7-20-15

Japanese Beetle Original article found at Japanese beetle adults are present throughout the state. In most areas, numbers are low, but there have been reports of locally high numbers. We continue t...

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Home, Yard, & Garden Newsletter article from 6-22-15

Home, Yard, & Garden Newsletter article from 6-22-15 Japanese beetle adults are present throughout Illinois. Robert Bellm, Extension Educator, reported their presence in southern Illinois, and Martha Smith, Extension Educator, reported them in northwestern Illinois. Extended deep soil freezing in northern Illinois...

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Japanese beetles
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Japanese Beetle Myth-information

Japanese beetle adults are above ground eating leaves for about 6 weeks from mid-June into August. After mating and feeding females lay eggs in moist, actively growing lawns. Eggs hatch into large "C" shaped grubs that feed on plant roots. In fall grubs burrow into soil. Next year they form adults and start the vicious cycle again. Horticulture educator Sandy Mason shares frequent myths...

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Japanese Beetles – lower numbers this summer!

Posted by Rhonda J. Ferree - News for Homeowners...

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Japanese Beetle Update by Dr. Phil Nixon

Many Japanese beetle larvae did not survive the winter, particularly in the northern half of the state. Research has shown that Japanese beetle grubs do not migrate deeper than 11 inches into the soil for the winter. They die if the soil temperature reaches 15 degrees F or if they are subjected to freezing temperatures for 2 months. Last winter the soil was frozen to 15 inches deep in centra...

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The Management of Japanese Beetles Begins Soon

It is not too early to begin preparing for Japanese beetle problems. "It is too early to tell how bad the Japanese beetle problem will be this year," says Rhonda Ferree, extension educator in horticulture with University of Illinois Extension. Here are some tips from Dr. Phil Nixon, Extension Entomologist, University of Illinois, for starting early to help keep Japanese...

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Beetles in Sweet Corn

I'm receiving some calls on how to control Japanese beetle in sweet corn. They feed on the silks and disrupt pollination, resulting in missing or sporadic kernels. Since my fact sheet for homeowners doesn't list this crop, here are the chemical recommendations for controlling Japanese beetle in sweet corn. Apply at fresh-silk stage to early and late corn every 2 days, repeat...

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Japanese Beetle News website now available

The current Japanese beetle invasion raises questions for many people. How long will they be here? Will my plants die? What can I do to stop it? To help answer these questions and more, University of Illinois Extension Educators Rhonda Ferree and Matt Montgomery developed a new website. The website is set up as a blog so that they can post the most current information at a moment's noti...

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