Goss's Wilt and Northern Corn Leaf Blight Showing Up in Iowa
Knowing the characteristics of Goss's wilt and northern corn leaf blight help in identification of the diseases; photographs illustrate those characteristics.
Integrated Crop Management News
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Check SCN Resistant Soybean Roots for SCN Females
Carefully checking roots now for soybean cyst nematode (SCN) females can tell you if resistant soybean varieties are controlling the nematode in the field.
Use Treatment Thresholds for Western Bean Cutworm
As adults emerge, scouting is extremely important in determining management of western bean cutworm.
Degree Days - Cool July With Good Crop Conditions
By Rich Pope, Department of Plant Pathology
Iowa corn is tasseling and silking this week. We think of the silk date as a marker for the final 60 to 65 days in which the corn reaches physiological maturity. That means we might expect dry down to extend into October across the state. Soybeans are setting pods, and with timely August rainfall, pods should fill nicely. Last week we lost approximately 50 degree days to average across Iowa, making July 2009 as one of the ten coolest in history.
Late-Season Herbicide Applications in Soybean
Weed reinfestations resulting from slow canopy development and ample soil moisture may warrant additional treatment this year.
Scout for Corn Leaf Aphids Before Tasseling
A well-timed spray while corn leaf aphids are outside the whorl or on the tassel is recommended when they exceed thresholds.
Corn Quality Issues Continue
Producers selling 2008 corn can expect closer grading and increased discount scales for damage; and they should take extra precautions to preserve the quality of 2009 crop.
Eyespot and Gray Leaf Spot Occurring in Corn
Diseases currently showing up in Iowa corn - eyespot and gray leaf spot - can result in yield loss and may increase the severity of stalk rot.
It is Time to Sample for Corn Nematodes
Many believe that changes in corn production practices may lead to increased damage from nematodes. Mid-season sampling is required to accurately diagnose nematode problems on corn.
July Workshops Offer Comprehensive Corn Nematode and SCN Training
Learn about biology,scouting and management of corn nematodes and soybean cyst nematodes, and earn certified crop advisor CEUs in two-all day workshops.