Insect Highlights

Insect Highlights for the Week of June 26,2003

Ground Beetle

Ground Beetle

GROUND BEETLE

They are big, black, and scary looking--they are a type of ground beetle (Carabid genus Scarites). The large jaws are used to feed on other insects. They are attracted to lights at night and sometimes wander inside by accident. They will not breed indoors, are harmless, and do not need spray treatments.
Ninebark shoot

Ninebark damage

Stalk borer damage

PLANTS WILTING?

These sickly-looking ninebark shoots have been attacked by the common stalk borer. These worms migrated from grassy areas. We have talked about them before in peppers, tomatoes, and other plants at http://www.entomology.wisc.edu/diaglab/hilites/hilt522.html. The best control for now is to mow grassy areas in mid august to prevent egg laying.

Stalk borer
Hickory tree damage from hickory pouch gall aphid

Hickory tree damage from hickory pouch gall aphid

FUNNY GROWTH ON HICKORY

The tumor-shaped galls are caused by an aphid called the hickory pouch gall aphid. The gall began forming as the leaves developed. Now the galls are opening up and many of the damaged leaves are falling. We see the heaviest infestations in trees isolated in landscapes. There seems to be far less activity in woodlots. It really is a cosmetic type of injury. It is too late to treat for this season. I would consider using the systemic imidacloprid (Merit) in the fall for trees that require treatments.

Longhorned beetle

 

LONGHORNED BEETLE

This is a type of long horned wood borer (Monochamus). It looks similar to the Asian longhorned beetle but does not have the distinct Polka dots. They are found breeding in dead and dying pines, spruce, and firs. See http://www.entomology.wisc.edu/diaglab/02hilite/6_5.html for details. These beetles are also strongly attracted to lights at night.

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URL is http://www.entomologyl.wisc.edu/diaglab/03hilite/6_26.html. Updated 06/28/03.

237 Russell Labs
1630 Linden Drive
Madison, WI 53706
608/262-3227

For more information contact: 
Phil Pellitteri, 608/262-6510
or e-mail Phil Pellitteri.