September 16, 2011, Volume 10 Number 19
View from the Field
I scouted a field in Sullivan County before a field day this week. The field had a lot of bird damage to corn ears. With some of the hybrids every ear of corn had extensive damage. Corn Ear Rots (molds) are the secondary pest of bird damage. Because the corn husks are pulled away ear it allows fungal pathogens to develop as seen in the photo below:
Gary Bergstrom looked at this photo and thinks the pink mold is Gibberella ear rot.
Foliar diseases were present on the leaves. There was northern leaf spot (Bipolaris zeicola) and northern leaf blight (Exserohilum turcicum) infecting most of the leaves on the plants. Stalk rot was a problem in the field with several patches of corn that had lodged as seen in the following photos:
At the point where the corn had fallen over the inside of the stalk was brown. Gary Bergstrom thinks this might be anthracnose stalk rot.
Here are two articles I have prepared in past years related to stalk and corn ear rots you might find useful in identifying diseases this time of the year.
With the excess amount of moisture we have experienced, it would be a very good idea to check fields for disease. Conditions are ideal for disease development in corn.
September 15, 2011
Precipitation from Lee was a huge event for NY this past week and again devastating flooding occurred. While the western and northern most edges of the state had less than half an inch, parts of central and eastern NY had over 7 inches, much within a 24-hour time period. Temperatures were up to 6 degrees above normal. The base 50 growing degree-days ranged from 75 to 125 for most of the state.
Today a cold front will bring noticeably cooler temperatures with highs only in the 50ís and rain likely, up to half an inch possible in areas. Tonightís temperatures will be in the 30ís, making frost a concern. Fog may develop and keep temperatures warmer and keep frost from forming.
Friday will only be slightly warmer with temperatures in the 50ís and reaching into the 60ís. Lows will again be in the 30ís with frost likely for some areas.
Saturday high pressure will push temperatures into the low to mid 60ís with sunshine. Lows will be in the upper 30ís to mid 40ís.
Sunday temperatures will be in the mid to upper 60ís. Lows will be in the mid 40ís.
Mondayís highs will be in the upper 60ís and low 70ís. Lows will be in the mid 40ís to low 50ís.
Tuesdayís temperatures will be in the low 70ís with a slight chance of scattered showers. Overnight temperatures will be in the upper 40ís to mid 50ís.
Wednesday will have highs in the low to mid 70ís with continues chance for light scattered showers. Lows will be in the mid 50ís.
The five-day precipitation amounts will range from half only a tenth up an inch up to an inch. The 8-14 day outlook is showing below normal temperatures for the eastern half of the state and unfortunately above normal precipitation for the whole state. The three-month (Sept/Oct/Nov) outlook is showing above normal temperatures and no precipitation outlook yet.
Alfalfa & Hay:
Dairy Cattle: Livestock Barn Fly Management:
Dairy Cattle: Pasture Fly Management:
PESTICIDE EMERGENCY NUMBERS
Emergency responder information on pesticide spills and accidents CHEMTREC: 800-424-9300
For pesticide information:
National Pesticide Information Center: 800-858-7378
To Report Oil and Hazardous Material Spills in New York State: NYS Department of Environmental Conservation Spill Response: 800-457-7362 (in NYS); 518-457-7362 (outside NYS)
Poison Control Centers: Poison Control Centers nationwide: 800-222-1222
If you are unable to reach a Poison Control Center or obtain the information your doctor needs, the office of the NYS Pesticide Coordinator at Cornell University, 607-255-1866, may be able to assist you in obtaining such information.
Keith Waldron: NYS Livestock and Field Crops IPM Coordinator
Ken Wise: Eastern NYS IPM Area Educator: Field Crops and Livestock