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Japanese Beetle News

Current information for homeowners and agricultural producers
News for Agricultural Producers

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 d...

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Japanese Beetles and Silk Clipping: New Research on an Old Foe

Posted on June 27, 2014 by Michael Gray On June 18, Robert Bellm, Commercial Agriculture Educator, observed Japanese beetles in Madison County, Illinois. Overall this season, I've received very few reports regarding this insect. With corn now r...

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Japanese beetle
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Japanese beetles survived the winter, now what

Strategy for Japanese beetle traps: Detection then removal. Late each May, I place a red insecticide strip and a pheromone lure into a specially designed Japanese beetle trap that resembles a colorful torpedo or bomb ( Figure ). The lure works to attract Japanese beetles two different ways, one portion holds a female sex pheromone that attracts males looking...

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2014 Beetle Update

Extension Entomologist Phil Nixon provided the following update during an academic horticulture team meeting on May 19 th . Now is the prime time for Emerald Ash Borer insecticide treatments as the new leaves are expanding. Go to for treatment options. We expect a reductio...

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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...

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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...

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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...

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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...

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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...

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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...

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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...

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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...

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Information for agricultural producers

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

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