Currently viewing the category: "Leaf Beetles"
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Subject: bugs on my weeping willow
Location: south east, north sc
May 20, 2015 3:08 am
These are all over my weeping willows and eating all the leaves.
Signature: paula

Cottonwood Leaf Beetle Pupa

Cottonwood Leaf Beetle Pupa

Dear Paula,
This is a beetle pupa, and we were immediately struck by its resemblance to the larvae of the Cottonwood Leaf Beetle that we just posted.  We did a quick internet search and our suspicion was confirmed on Featured Creatures.  We are certain that this is the pupa of a Cottonwood Leaf Beetle,
Chrysomela scripta.

Thank you so much. I’ve got to get rid of them. They are on just about every leaf of my weeping willows and in my birdfeeders. I would hope the birds would eat them. But it’s not happening. The leafs on my willows are just about gone.

What's That Bug? does not endorse extermination

Subject: What is this bug?
Location: Suffolk, Virginia
May 17, 2015 1:14 pm
These little bugs are all over my deck, and the willow tree nearby. What are they, and how can I get rid of them?
Signature: Robin Moore

Cottonwood Leaf Beetle Larva

Cottonwood Leaf Beetle Larva

Dear Robin,
You are being troubled by Cottonwood Leaf Beetle Larvae,
Chrysomela scripta, and according to BugGuide, it:  “used to be considered a pest when willows were grown commercially for baskets, now of little economic consequence.”  Featured Creatures has a very nice page on this species where it states:  “The cottonwood leaf beetle, Chrysomela scripta Fabricius, is one of the most economically-important pests of managed cottonwood, aspen and some poplar and willow species. Although it does not present a serious pest problem in forests, often it is a severe pest of urban ornamental trees. This leaf feeder has several generations each year, may cause extensive leaf loss, and can consequently reduce stem volume up to 70% (Coyle et al. 2005).”

Cottonwood Leaf Beetle Larvae

Cottonwood Leaf Beetle Larvae

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Subject: Rainbow Colored larvae or caterpillar
Location: New Bern, NC
April 19, 2015 11:17 am
Found a few of these crawling around a small shrub at the edge of the woods behind my house; North Carolina, Croatan Forest, Longleaf Pine/swamp habitat. Never seen colors like this before and can’t find it in my caterpillar book nor online. (You try Googling rainbow caterpillar/larvae and see what you get! LOL . . .)
Help?
Signature: Diane

Groundselbush Beetle Larva

Groundselbush Beetle Larva

Dear Diane,
We have trouble remembering the name of the Groundselbush Beetle Larva,
Trirhabda bacharidis, but we always remember its distinctive appearance and we can quickly locate older postings of Groundselbush Beetle Larvae.

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Subject: Pumpkin Beetle
Location: Thailand, Chiang Mai
March 2, 2015 8:01 pm
Hello Daniel,
thank you and you are right after searching for the name.
Here is something that might interest you:
This is an “orchid lover” … a real pest at orchid nurseries here in Thailand.
People call it “Pumpkin beetle” (Aulacophora abdominalis) but it isn’t one. Look at black legs and antennae.
And it’s neither Stethopachys formosa or Lema pectoralis, but close to them.
The bug and its larvae love orchid flowers, especially these of the Aeridinae group (Vanda, Rhynchostylis, Seidenfadenia and all of their hybrids), Dendrobium and Spathoglottis.
Regards … Ricci

Mating Leaf Beetles

Mating Leaf Beetles

Hi Ricci,
In the future, please submit new requests by using our standard submission form.  We realize it is easier for you to just attach additional images to a previous response, but it makes our postings so much easier if we are able to use the format of our submission form.  Thanks so much for sending us images of two phases of this Leaf Beetle.  We haven’t the time to research its identity this morning, but we are posting the images and we will provide additional feedback at a later time.
  We hope the eggs are not exported with the orchids because the introduction of a major orchid pest can wreak havoc on orchid nurseries around the globe as orchids are such a popular gift item.

Leaf Beetle Larva

Leaf Beetle Larva

Update:  March 4, 2015
We did locate this similar search for an identification on the Dokmai Dogma Drama In The Orchid Nursery posting.

Hi Daniel,
the orchid nurseries that export their plants use so much poison (most of it is forbidden in Europe) … no egg or Beetle will survive this.
When I asked a friend who own a nursery about this beetle, she answered:
“For bug (Pumpkin beetle) use Dicrotophos and Sticking Agent spray 5 days per time. And larva use Abamectin and Sticking Agent.”
Abamectin and Dicrotophos are highly toxic and dangerous for the environment.
Btw.:
– In Australia the black and yellow Dendrobium beetle (Stethopachys formosa) is a pest in orchid nurseries.
– Lema pectoralis has been reported from orchid nurseries in Thailand.

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Subject: Metallic wheeled beetle
Location: Buckinghamshire, England
February 22, 2015 12:06 pm
Hello, I’m a gardener living in the south of England. I saw these beetles living on a rosemary bush. There was about 15-20 of them. I saw the over two seasons on the same rosemary bush but never anywhere else in the garden or in England for that matter.
Any ideas?
Signature: Jackson Rowe

Rosemary Leaf Beetle

Rosemary Leaf Beetle

Dear Jackson,
You have the hands of a gardener.  Your beetle is a Rosemary Leaf Beetle,
Chrysolina americana, which is sometimes called merely a Rosemary Beetle.  Knowing that it feeds on a single plant in your garden, Rosemary, is a good way to search for its identity.  According to UK Safari:  “Despite the scientific name, this beetle is a native of southern Europe.  It was first noticed in the U.K. in the early 1990’s and has since become well established.”  You can locate additional information on the Royal Horticultural Society website where it states:  “The larvae and adults feed on the foliage of rosemary and related plants.  Rosemary beetle is a pest that eats the foliage and flowers of various aromatic plants, such as rosemary, lavender, sage and thyme.  Initially rosemary beetle was found mainly in London gardens, but it is rapidly spreading and is becoming widespread throughout England and Wales, and possibly further north.”

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Subject: Beautiful beetle
Location: California
February 21, 2015 3:04 pm
Hello again! I found this lovely iridescent beetle this morning, sitting on a leaf near one of our tiny seasonal creeks. It looks something like Chrysochus auratus, but the references I see for that species say it is found in Northeastern US, and I am in the Sierra Foothills of California (oak savannah terrain). Can you help me identify this one?
Signature: Megan Ralph

Possibly Leaf Beetle

Possibly Leaf Beetle

Dear Megan,
This is not a Dogbane Leaf Beetle, but we believe your metallic beetle is also a member of the Leaf Beetle family Chrysomelidae.  At this time, our research has not produced a visual match.

 

Kathleen O'Dwyer, Sue Dougherty, Kathy Haines, Alisha Bragg, Amy Gosch, Kristi E. Lambert, Andrea Leonard Drummond liked this post
What's That Bug? does not endorse extermination