Overseas Beetle Invasion!

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It is another great week in the Wonderful World of Weed Man!  It’s been hot in the Treasure Valley recently – REALLY HOT!  When the temperatures go up, so do the bug problems.  We are continuing our bug series, “I Found an Alien in My Lawn!”  Last time we wrote about “Defeating the Great and Mighty Billbug!” This week, we will touch on a Beetle Invasion –  very similar lawn bug – the Japanese Beetle.

It is possible that you have never heard of the Japanese Beetle.  They are relatively new to the U.S.  The Japanese Beetle was first noticed in 1916 in New Jersey.  It is thought it came oversees from Japan.   Though it is a highly invasive insect, it normally is found in the eastern U.S.  The State of Idaho has been monitoring for them since 1990, but it was very rare to find them.  Unfortunately, residents of the Treasure Valley had seen an introduction of a large quantity of Japanese Beetles in 2012.

Popillia_japonica_-_Japanese_beetle.JPG

The Japanese Beetle is very similar to a billbug in a variety of ways.  They are both beetles that lay eggs in turf grass.  The larvae will feed on the turf, then they will transform into an adult beetle.  As larvae they look very similar and the damage to lawns are very similar.  In fact, treatment of larva is very similar as well.  In general, the similarities end there.  As adults the Billbug Beetle and the Japanese Beetle differ in many respects.

While the Billbug as an adult does cause damage to plant life, it is insignificant in comparison to what the Japanese Beetle can do.  Billbugs will feed on grass blades and the damage is generally unnoticeable even in comparison to the damage its own larva will do.  Japanese Beetles, on the other hand, is very destructive.  The Idaho Department of Agriculture, has great information regarding this insect.  ISDA has sent out information regarding why it is so important to keep the Japanese Beetle from gaining a foothold in Idaho. –

“Japanese Beetles (JB) are highly invasive insects from the eastern U.S. that were unexpectedly found in large numbers in Boise beginning in the summer of 2012. In addition to severely damaging turf during their larval stage while feeding on grass roots, adult JB attack and can kill over 300 kinds of ornamental and crop plants, while consuming leaves, fruit and flowers. They especially like roses, berry bushes, grapes and fruit trees. If JB were allowed to establish in the Boise area, the entire state would become quarantined for the pest. This could result in numerous negative implications for Idaho’s plant nursery industry, for homeowners and gardeners, and eventually for Idaho’s agricultural growers and producers.”

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As you can see – the Japanese Beetle is much more damaging potentially than the Billbug – which is why we want to help educate our customers on the insect.  The ISDA is very active in helping eradicate this pest altogether.  They have had several treatment campaigns with very good success since 2012 when the pest was first found.

Japanese Beetles will only have one generation per year.  They lay their eggs in the soil during July and August, and they will hatch and feed from July to October – then they move deeper in the soil to hibernate for the winter.    This is the time of year that we can see the damage from the larva and a perfect opportunity to help the ISDA in their efforts to control this insect.

Treatment for the Japanese Beetle is very similar to the Billbug – and if you have treated your lawn for Billbugs, you shouldn’t have any issues with the Japanese Beetle.  If you have not treated for Billbugs, and have seen insect damage on your lawn, it is important to verify what is causing the damage.  If you think it might be a Japanese Beetle larva, give Weed Man a call.  We can help identify it, and bring a specimen to the ISDA to confirm.

For more information on the Japanese Beetle and ISDA’s success in treatment, visit the ISDA website on the Japanese Beetle Project.

Keep checking back every week to learn more about caring for your lawn!  You can follow us through WordPress, or on Twitter.  #wecareforyourlawn www.weedmanboise.com 208-888-9911

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