What's that triangular purple box hanging in trees?

It's all about EAB, or Emerald Ash Borer (Agrilus planipennis), a ruthless insect invader from eastern Russia, northern China, Japan, and Korea.  How did it get here?  It's not clearly known, but it is likely that it came in ash wood used for stabilizing cargo in ships or for crating consumer products. 


Recently, an EAB trap was put in an ash tree across the street from our offices at the Old Port park.

EAB is a wood boring beetle first found in SE Michigan nine years ago.  Ever since, it has been detected in southern Prince George's County, Maryland; Indiana, Illinois, Pennsylvania, Virginia, West Virginia, and other states.  EAB is a serious pest to the ash trees as the adult beetles feed on the tree's foliage and the larvae, the most harmful life stage, feed on the inner bark of the trees creating S-shaped tunnels that damage the vascular tissues under the bark.  Of course the ash trees then die. 

The purple boxes you see in many trees throughout the state are traps set in ash trees to attract and catch the beetles.  These traps are set by the Maryland Department of Agriculture (MDA) as part of a national survey for the emerald ash borer.  People should not be worried about these traps and should actually not disturb them since this is part of a major effort to detect this pest and to save our ash trees!  Read more at the EAB website.

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Just wondering I live in nort

Just wondering I live in nort east Pa. And I have seen them the other day I noticed that one was on the ground don't know if it was knocked down by people or maybe an animal but I'm tring to find out who to contact about it. ?

Nice to know what there are,

Nice to know what there are, we live in western WI and have been seeing a lot of the boxes.

been seeing theses boxes for

been seeing theses boxes for a long time, glad to know action has been taking place.

I hope this method works,

I hope this method works, it's the first time I hear about these insects and they are not good news. I assume pest control companies in the area have the situation under control, I cannot think about the alternative.

Inside the purple box appear

Inside the purple box appear to be an over sized silica packet hanging in the middle. It is completely hollow on the inside, ill try to take a picture

i understand the purpose of

i understand the purpose of the boxes, but why purple? it is a strange color to see hanging from trees. i wonder if it attracts the beetles?

I think its because the color

I think its because the color purple attracts the betles

I too would like to know

I too would like to know this. why purple?

Purple Boxes

I have noticed these around my home in NY then on a recent trip throughout New England,noticed them also.

Glad to see PA down with the

Glad to see PA down with the Ravens Purple!!!!!! Go Ravens

Purple boxes

Thanks for the info. I have an ash tree and am glad to see somebody is looking for these nasty bugs

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