Wireworm damage is showing up in many fields. Damaged plants, which are shown in the photograph below and on the left, are yellow and/or red and stunted. As time goes on, plants die and disappear, leaving blank spots in affected drill rows. Feeding damage is usually easy to find—look just below the soil surface for “chewed-on” or frayed tissue. Damage usually occurs early in the spring, and it can be especially bad in small wheat—spring varieties or late-seeded winter wheat [03/14/2016].
Rust was identified (Monday, March 14th) in a field of relatively small (late-planted) hard red winter wheat—on the west end of the county (look closely at the lower leaf in the photograph below on the right). This fungal disease has now been found on multiple varieties of hard red and soft white winter wheat in eastern and north-central Oregon.
Thistle plants are now evident in many fields of fallow. They are about the size of a quarter (bottom photograph). Recent rains will promote the germination and emergence of additional seedlings.
Current Winter Wheat Yield Potential is 28-32 bu/ace.
Inspect fields for rust on a weekly basis and consider applying a recommended fungicide while also spraying for weeds. Don't wait too long to control Russian thistle plants. [03/14/2016].