By Scout Nelson
Scouting teams across Minnesota continue to monitor small grain fields for disease and insect activity. Recent rains have created longer periods of leaf wetness, especially outside the Red River Valley north of Highway 200, where dry conditions persist. This increased moisture is creating ideal conditions for the development of several diseases in small grains.
Among the primary concerns is Fusarium Head Blight (FHB). For oats and barley reaching Feekes 10.5, or full heading stage, experts recommend switching to a fungicide labeled specifically for suppressing FHB. The risk forecast remains moderate to high across the state, except for the most northern counties in the northwest and the southernmost counties in the southwest.
Similarly, for wheat entering Feekes 10.51 (beginning of anthesis), applying a fungicide is advised. “Choose one of the premium fungicide products when your variety has an FHB rating of susceptible to very susceptible (>6 or higher),” the update states. This step is especially important to prevent crop loss under these increasingly favorable conditions.
Insect activity is also being observed. Aphids are present across many fields in Minnesota. In Mahnomen County, scouts identified cereal leaf beetles (CLB). Once the crop reaches the boot stage, the economic threshold for CLB is one larva per flag leaf. Action should be taken if this threshold is met to avoid damage that can impact yield and grain quality.
Overall, the update highlights the need for timely disease management and pest management. As conditions remain favorable for FHB and insect activity continues, growers should remain alert and responsive to protect their small grain crops.
Photo Credit:istock-fotokostic
Categories: Minnesota, General