Blog Banner

Japanese Beetle News

Current information for homeowners and agricultural producers
bullfrog in garden pond that devours Japanese beetles when they are thrown into the water. Maybe this is an alternative control method!

Frogs - an alternative control method?

The past two nights we picked Japanese beetles off of our rose and grape plants. There weren't many, so it was pretty easy to do. We threw the beetles into our garden pond, thinking that the fish would eat them. Instead, one of the large bullfrogs leaped three feet across the pond and began devouring the bugs. I will try to take a video of this and post....

Read More >

Thoughts on Tank-Mixing Insecticides for JB in Corn

Posted by Matt Montgomery -

We continue to receive calls from growers wondering if they should tank-mix an insecticide when applying other pesticides to corn that has not yet silked (Note: many of these fields will silk within several days). Will this approach keep Japanese beetles out of the field as silks are emerging? Following are some comments made during a discussion of insecticide mode of action in the February 22,...

Read More >

200 bushel corn field - isolated end row damage

Japanese Beetle - Misconceptions

As with any new pest, folklore about that insect becomes an issue. Japanese Beetles are no different and have their own share of "urban" field legends that need to be dispelled. Contrary to some claims, these insects do not primarily feed on pollen. Some in agriculture have speculated that Japanese beetles will cause little to no yield loss in corn because they prefer pollen, feeding on...

Read More >

Television Interviews with Matt Montgomery

Tips for Managing Japanese Beetles  on WEEK's Good Company Japanese-Beetles,,,To Spray Or Not To Spray  on WEEK's Good Company...

Read More >

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...

Read More >

What About Japanese Beetles In Beans?

Can Japanese beetles be a "yield-reducing" pest in soybean fields? Japanese beetles cause damage resembling a network of small holes when feeding on soybean leaves. They may also feed on flowers. However, as with corn, leaf damage is usually not of economic significance. While a possible yield reducer in soybean fields, Japanese beetles are only deemed of economic significance when twen...

Read More >

Bird Toxicity to chemical treatments

I've had a couple questions about how the chemicals used to control Japanese beetles affect birds in your yard. Obviously, the most safe control options are nonchemical. However, if you choose to use chemicals, here is some more information. I checked the labels for each of the products that I have listed on the one page factsheet for homeowners. The only product that is nontoxic to birds is pe...

Read More >

Japanese beetle injury on linden
click image to view 8 more

Picture Gallery

Gallery containing pictures of Japanese beetles, look-alikes, and the damage that Japanese beetles cause. Japanese beetle gallery...

Read More >

Japanese Beetle FAQ (Frequently Asked Questions)

Question : Why do Japanese Beetles congregate in mass? Answers : Adult beetles congregate in an area for two reasons. First, females release a pheromone (mating attractant) as they feed, drawing males to that general location, which also begin to feed. Secondly, the first beetles in an area release another set of chemicals that draw later emerging beetles/other a...

Read More >

Japanese Beetle NEWS website now available

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 s...

Read More >

A Whole Lot of Info About....Grubs

Any discussion of Japanese Beetles would not be complete without a good discussion of this insect's larval stage, termed the white grub. Area producers can testify to quite an increase in grub observations over the last decade, but several beetle larvae can actually be classified as white grubs. So which grub is which? How does one tell the difference? Four "grub groupings" are commonly...

Read More >

Japanese Beetle Life Cycle

Japanese beetles go through a yearlong lifecycle. Adult Japanese beetles tend to emerge in our area around the mid to latter part of June. Those adult beetles, noted for their metallic green head, metallic brown wing covers, and white abdomen-lining "tufts" of hair, mate and burrow a couple inches deep in the soil. There they lay an egg or two and continue the process every few days for a perio...

Read More >

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. T...

Read More >

Information for agricultural producers

Information on Japanese beetle from the University of Illinois Field Crop IPM  program....

Read More >

News Release - Soybean Defoliators

This article was originally published on July 20, 2009 and expired on July 27, 2009. It is provided here for archival purposes and may contain dated information. Soybeans are one tough crop when it comes to pests. Soybean cyst nematode, soybean rust (which has yet to enter our state at a troubling time), soybean aphids (which can be problematic from time to time), and a few minor dise...

Read More >

News Release - Combatting Japanese Beetle with Less Pesticide

Pest management continues to be an important issue in the garden and field, and pesticides tend to be the popular remedy for such problems. Summer infestations of the Japanese beetle highlight the pest management dilemma faced by area residents. How can residents improve Japanese beetle management while decreasing overall pesticide use? U of I Extension initiated a comprehensive program in 2011...

Read More >

News Release-What Can Mother Nature Do to Japanese Beetles?

This article was originally published on January 23, 2012 and expired on January 30, 2012. It is provided here for archival purposes and may contain dated information. Our mid-January cold snap has made the winter of 2011-2012 seem a little more "real." In other words, January finally felt like January. However, it was only a few weeks ago that temperatures crept upward enough for anh...

Read More >

News Release - False Japanese Beetle Reminder

Local Master Gardeners and some area Extension educators noticed the first few Japanese beetles in our area, but they have also noticed a Japanese beetle look-a-like. The insect is known as the False Japanese Beetle and has been observed in area fields and yards. About one-half inch long and brown in color, False Japanese Beetles are a very common pest of roses in Mason and Tazewell Counties. T...

Read More >

PSA for Ag Producers on Japanese Beetles

Japanese Beetles have been of recent interest for many, and as such, they deserve a moment in the " spotlight." Japanese beetles go through a yearlong lifecycle. Adults tend to emerge in our area around the middle or latter part of June. Those adult beetles (noted for their metallic green head, metallic brown wing covers, and white abdomen lining "tufts" of hair) mate, lay an egg or two...

Read More >