WSU CAHNRS

College of Agricultural, Human, and Natural Resource Sciences

Department of Entomology

Russian Wheat Aphid

Insects &
Arthropods

Black Widow Spider
Blister Beetle
Box Elder Bug
Cat Face Spider
Cat Flea
Cereal Aphid
Cereal Leaf Beetle
Cicada
Corn Earworm
Crab Lice
Cooley Spruce Gall Adelgid
False Wire Worm
European Mantis
Housebug
Jumping Spider
Juniper Scale
Locust Borer
Minute Pirate Bug
Mosquito Diseases
Northern Scorpion
Rose Curculio
Russian Wheat Aphid
Snowball Aphid
Ten Lined June Beetle
Thrip
Western Yellow Striped Army Worm
Wheat Stem Sawfly
Wire Worm
Wooley ash aphid
Yellow Jacket Wasp
Yellow Sac Spider

 

Diuraphis noxia (Mordvilko)

It is early for Russian Wheat Aphid (RWA) to show up on fall seeded wheat. But while surveying winter wheat on March 29, 2006, I found light numbers of RWA on wheat still suffering from the winter.

I also found that most of the RWA were parasitized by the Braconid wasp Diaeretiella rapae which is a very effective biological control against RWA and other aphids in cereal crops.

The field diagnostic is a small light green aphid with a “parrot beak” caudum. Some wheat varieties display white or yellow stripes with just one RWA on a tiller. RWA does not vector viruses but is very toxic.

Economic thresholds are usually not reached if spring temperatures allow parasitoid activity prior to RWA population increase. Several insecticides are labeled for RWA management when needed.

Department of Entomology, Washington State University, Pullman, WA, 99164-6382 USA, 509-335-5422, Contact Us
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