Mallow Sawfly, Hibiscus Sawfly (Atomacera decepta)

Order: Hymenoptera (hy-men-OP-ter-a) (Info)
Family: Argidae
Genus: Atomacera
Species: decepta

Regional

This bug has been reportedly found in the following regions:

Anniston, Alabama
Vincent, Alabama
Barling, Arkansas
Clinton, Connecticut
Wilmington, Delaware
Atlanta, Georgia
Woodstock, Illinois
West Des Moines, Iowa
Brookeville, Maryland
Columbia, Maryland
Pasadena, Maryland
Billerica, Massachusetts
Brockton, Massachusetts
Clarklake, Michigan
Temperance, Michigan
Grenada, Mississippi
Hudson, New Hampshire
Blackwood, New Jersey
Coram, New York
Henrietta, New York
Port Washington, New York
Corning, Ohio
Pataskala, Ohio
Quakertown, Pennsylvania
Summerville, South Carolina
Spring Hill, Tennessee
Spring, Texas
Show all

Members' Notes:

0
positives
2
neutrals
4
negatives
RatingContent
Neutral

On Aug 21, 2006, Magpye from NW Qtr, AR (Zone 6a) wrote:

This pest of hibiscus, hollyhock, and other ornamentals has been called the hibiscus sawfly in the scientific literature. However, it attacks several members of the mallow family, Malvaceae, and is perhaps best referred to as the mallow sawfly.

Adult Atomacera decepta are small and stout, not quite a quarter inch long. They are mostly black, except for a yellowish brown area on top of the thorax of many specimens, and the wings are smoky. Mature larvae are pale green, have a dark head, and reach about half an inch long. Each thoracic and abdominal segment bears a transverse row of four to six truncate tubular glands. The species occurs from New England south to Florida, and west to Missouri, Arkansas, and Texas.

The mallow sawfly is considered a minor pe... read more

Negative

On Mar 31, 2009, CaptMicha from Brookeville, MD (Zone 7a) wrote:

I hate these bugs. Every year they come and skeletonize my hardy hibiscus.

One year I got fed up and applied systemic chemicals and it took care of the problem but since the plants attract hummingbirds, it wasn't a very good solution.

Neutral

On Jun 12, 2009, PeteM from Brush, CO wrote:

I definitely have something eating my hollyhocks.
The fly I have is not, by any means "stout", but does have similarities. Being from Colorado the geography doesn't work with the other comments.

Negative

On May 31, 2010, blupit007 from Clinton, CT (Zone 6b) wrote:

The larva go after my Hardy Hibiscus every year. They are a BIG problem. They completely annihilate the leaves. Makes for a pretty sad plant. I never had a problem with my tropical hybrids though. This is the first year that I saw the adult Sawfly. It wasn't until the BugFiles that I put the two of them together. As for a solution, would love to hear one. Please tell me how to get rid of them.

Negative

On Aug 16, 2012, SunnyMD from Pasadena, MD wrote:

3 yrs ago, I had never seen nor heard of sawflies here in MD. But for the past 2 summers, they devastated my hibiscus. They look like tiny, common house flies, with an orange/rust spot on the back. They swarm around the hibiscus all day most of June and into July, and they lay eggs on it. When offspring is born, they eat the leaves to lacey shreds, stunting its growth, and ruining chances of flowers. IF YOU SEE SAWFLIES AROUND YOUR BUSH, THEN YOU SHOULD ACT AGAINST THEM QUICKLY BEFORE THEY LAY EGGS.

Unfortunately I have not found an easy and environmentally friendly way to repel them. My organic spray does not affect these pests, and many brands don't either. Ortho systemic insecticide kills them, but I don’t want to harm beneficial insects nor the environment. My compro... read more

Negative

On Mar 1, 2014, j3maloney from Elsmere, DE wrote:

Like others, I hate this bug! It turns my beautiful Kopper King hibiscus into lace in a matter of days. I have tried the "Double digit insecticide" (squashing them between finger and thumb), but while it's gratifying, there's no end to them - they just keep coming. I tried insecticidal soap with no luck, so I, too, finally resorted to a systemic and I tried to use it just as the plant was leafing out in hopes it would stop the infestation early. This worked pretty well and allowed the plant to do really well through the flowering period, but the flies returned, although not as many.