While this year potato psyllids have been collected from western and south-central Idaho, today we had the first report of a Liberibacter (Lso)- Carrying insect. Lso is associated with zebra chip disease in potatoes. Click for information about potato psyllids and zebra chip disease.
Wireworms continue to impact cereal production in Idaho. Typically we expect a reduction in wireworm activity later into the summer. This year, however, we continue to collect the insect in considerable numbers in cereal fields. Not much damage is expected at this point since wheat and barley crops are at later stages of development. Delayed growing season, and early-season rainfalls, may explain continued wireworm activity.
If you think that you might have wireworms in your field please contact us for monitoring instruction. Seed treatment and proper rotation are recommended.
Be aware of safflower susceptibility to wireworm damage. Click for information about wireworms and their management.
We have received several reports of Hessian fly infestation in Northern Idaho and Eastern Washington. Our screening program to identify sources of resistance in spring and winter wheat genotypes. These efforts are in collaboration with University of Idaho and Washington State University wheat breeding programs. Click for information about Hessian flies. Contact us for resistant PNW varieties.
So far, it has been a quiet year for aphids. However, aphid infestations have been reported from central Idaho wheat fields (Magic Valley). Cereal aphids alone usually are not treated unless populations are extremely high. Cereal aphids however, are of concern if there is a risk of BYDV; BYDV is transmitted by the cereal aphids, with the exception of the Russian wheat aphid. A combination of cultural (removing volunteers, weeds; late fall planting) and chemical (neonicotinoid seed treatment) practices are recommended to minimize the risk. Click for more information about managing BYDV in cereals.
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