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A resident of our county ... #194329 - Ask Extension


A resident of our county ... #194329

Asked June 25, 2014, 6:42 PM EDT

A resident of our county brought in several samples of some insects that looked like (dragon crawlers) Lady bug beetles the next day when I went to I.D. them , overnight they hade turned into whitish colored beetle forms with several black dots on the back some dots connecting into cheveron de sign with double rows of black spots above and below the cheveron lines. Today just when I think their dead (again) Low and behold 2 are moving and one of them is now turning pale green in color and I count 14 separate black spots and 2 white spots on the black part of its head. Anyone know what kind of lady beetle this is? good or bad.

Hubbard County Minnesota

Expert Response

  The cottonwood borer (Plectrodera scalator)   The  adult longhorned beetles  are 1 to 1.5 inches long.   Adults emerge from late spring to mid summer and live about a month.  Adults are black and white checkered with black antennae.      Could you send us a picture of the insect.  Where was the insect found.  
Pat Mack Replied June 25, 2014, 10:39 PM EDT
I'm sorry I'm not able to send a picture as I'm notthat electronical savae. But.. you were wrong about the insect It isnot a longhorn beetle but a Ladybeetle .In one of the stages of growth . They turned a pale greenish gray color on the wings and underneath, the bottom side they were orange I just don't  know if they are Asian Ladybeetles or American Lady beetles. I counted 14 or more spots on their backs. D.W. Hubbard CO. Mastergardener
The Question Asker Replied July 05, 2014, 8:30 AM EDT
DW, MN in Hubbard County:
Thanks for helping out your local community as a U of M Extension Master Gardener.

Please note that Ask an Expert / AAMG should not be used by Master Gardeners for help in answering questions. The question load from the gardening public is very high on AAMG and if Master Gardeners add their questions, the AAMG volunteers will not be able to meet the national eXtension goal of answering the public's questions within 24 hours.

To ask other MGs for their help, please use the MASTGAR listserv. You may also choose to use the diagnostic tools - in this case "What insect is this?" - and Extension publications found at If, after exhausting these resources, you still cannot find an answer, you may email the appropriate extension educator directly for help. In the case of insects, Jeff Hahn would be the appropriate extension educatot to contact.

Thanks for your efforts. I hope you are enjoying the summer. Seemed like it would never get here!
Julie Weisenhorn Replied July 07, 2014, 11:55 AM EDT

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