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Archive of posts published in the category: rust

Fusarium Head Blight Risk Elevated in Flowering DE/ MD Wheat

Wheat in southern parts of MD and DE, as well as some early flowering varieties, began flowering the latter half of last week and most of the remaining wheat I expect to flower sometime in the next 7-10 days, depending on temperature.  Flowering…


Should I apply a fungicide to my wheat?

“Should I apply a fungicide to my wheat?”  That is a common question among many growers this season.  My advise has been this: go out and look at your wheat.  Really look at it, don’t just drive by at 60 mph with Lynyrd…


Stripe Rust Update

Growers should be aware that Stripe Rust was confirmed in different parts of Virginia, including the Eastern Shore, over the weekend.  As mentioned last week, it was confirmed in Kentucky, North Carolina, and Tennessee the previous week.  Currently the level of infection is…


2015 wheat fungicide table now available

Each year our national wheat pathology working group gathers and publishs an updated list of fungicides for small grains.  We utilize our local data to determine the relative performance of products on specific diseases.  This year’s list is changed somewhat from last years. …


What you do in the fall can impact small grain diseases in the spring

Small grains will be planted in the next few weeks. The decisions made at planting can and do significantly impact many diseases of small grains in the ensuing season. The following is a brief review of some of the more important planting decisions…


Fungicide use in Wheat

Fungicide use is common in small grains and can be a useful tool to protect yields from yield robbing diseases under the appropriate conditions.  In Del-Ma, our most common yield impacting diseases include powdery mildew, leaf blotch complex (Septoria and Stagonospora leaf blotch),…


Rusts in 2014

Rusts are fungal pathogens with complex life cycles.  After infecting a susceptible host, a rust pathogen produces a organ that functions as a straw, draining the plant of carbon and other vital nutrients.  This is different from other fungal pathogens such as Fusarium,…


Scouting for diseases in small grains

Scouting fields for plant diseases is a simple way to maximize profits and yields over time.  Scouting allows growers to assess stand losses early and replant as needed, determine what diseases are active and their potential to damage the crop at key growth…


New Research on Corn and “Greening Effect”

New research from Iowa State University indicates that pyraclostrobin, a fungicide active ingredient in the group 11 strobilurin class, delays senescence but does not extend grain fill.   In their study, conducted from 2008-2010, corn was sprayed with pyraclostrobin at VT.  Researchers then assessed…


Soybean Rust Update

Revised 10/4/2013 We have yet to detect SBR in Delaware, although the disease has been detected in additional counties in Tennessee and Kentucky over the past week.  On October 4th, SBR was detected in additional counties in SE Virginia.    Regardless of the…