Integrated Pest Management (IPM) for the Cereal Leaf Beetle in Washington State (EM054E)
The cereal leaf beetle, Oulema melanopus
, (Coleoptera, Chrysomelidae
), is a pest of cereal grains, grass forage/seed crops, and other grass-host species in the Pacific Northwest region. In Washington, the cereal leaf beetle has caused yield losses of 25% in spring wheat (Pike and Gould 2002).
Identification and Biology of Aphids and Cereal Leaf Beetles (Video) – Eigenbrode
Integrated Pest Management for the Wheat Head Armyworm Complex in the Pacific Northwest (PNW696)
The wheat head armyworm complex (WHAC) is comprised of two armyworm species, Dargida diffusa
(Walker) and Dargida terrapictalis
(Buckett), which caused recent, intermittent damage to cereal crops in the Pacific Northwest (PNW). This was the first record of D. diffusa
as a pest in the PNW. While D. terrapictalis
is native to the region, it has not been recorded previously as a pest. This publication covers identification, biology, and integrated pest management for WHAC. We emphasize pest monitoring and field scouting methods, and also discuss natural insecticides.
Wheat Head Armyworm True or False: A Tale from the Pacific Northwest (EM9000E)
Armyworm caterpillars can be a troublesome pest in cereal grains grown in the Pacific Northwest states. These caterpillars, from the genus Faronta
, have caused crop damage in Umatilla County, Oregon since 2007. In 2007 and 2008 the pest caused damage to crops in Lincoln County, Washington. Researchers also noted a 35% yield loss due to the insect in 2007 and 2008 in spring wheat trials conducted by Washington State University (WSU) near Davenport, Washington (Roberts 2008, 2009a, b). Bonneville County, Idaho reported damage from the pest in 2005 and 2006.
Wheat Midge: A Possible New Wheat Pest in Washington State
The wheat midge (Sitodiplosis mosellana
) was found in several eastern Washington counties in 2011, with the potential to damage spring wheat crops. However, WSU scientists do not recommend that farmers apply insecticides unless they know they have an economic infestation.