Mike Flowers, Oregon State University Cereal Specialist, is offering the following observations at our CBARC and Ruggs OWEYT trials.
It appears that HTAP is finally kicking in. On many varieties it was very difficult to find active rust. Of course there were exceptions like Tubbs 06, Xerpha, and AP Legacy.
Also several varieties are showing hypersensitive reactions like OR2040726 (little to no active rust, but lots of yellow).
Growers in the area seem to have stayed on top of the rust and kept it under control (there are exceptions). Hopefully this will keep the rust load down for the remainder of the year and next fall.
The crop is late. Neither site was headed yet, which means we are 10-14 days behind.
There will be plenty of moisture for early seeding as we continue to get rain. This sets us up for fall stripe rust infections and may mean we will see another bad rust year. So variety selection this fall will be very important.
Be sure to attend one of the OSU Station Field Days near you next week to get more information on this topic and other research farming cereals in the Pacific Northwest.
Friday, June 3, 2011
We are reaching, if not past in some areas, the point where fungicide applications are effective in controlling stripe rust. Remember -applications at late growth stages (past flowering) usually do not increase yield regardless of rust level.
Also watch your applications to insure that you don't exceed the maximum rate for the season. Also carefully read if the fungicide label is using a maximum stage of growth such as Feekes 10.5 and/or a Pre Harvest Interval (PHI) of a minimum number of days to harvest.
Hopefully, with temperatures in the 80's over the next several days we will at least have some drier and warmer conditions in the fields.
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