Welcome!
May
9, 2012
CORN
Spraying
Fields with Emerged Corn
Many
corn fields were planted April 25 - 27, 2012 did not receive intended soil applied
herbicides before the corn began to emerge. In
some cases, it was also the intention to apply 100+ units of liquid nitrogen fertilizer
with the herbicide. And now emerged weeds are (still?) there too. So now what?
Bob Hartzler and John Sawyer address these issues in the article at https://www.extension.iastate.edu/CropNews/2012/0508hartzler.htm.
Stalk
Borers on the Move
According
to Growing Degree Day accumulations, base 41, stalk borers are starting to move from
grassy areas into nearby corn fields along and south of Highway 34 (Burlington
Mount Pleasant Fairfield area) and will soon start to move from grass into nearby
corn fields north of Highway 34.
Information
on scouting and management can be found at the ICM News article at https://www.extension.iastate.edu/CropNews/2012/0508hodgsonsisson.htm.
Local
Growing Degree Day accumulations are shown at https://www.extension.iastate.edu/Pages/eccrops/stalkborer.html.
You
can get an early heads up of the size of potential movement of stalk borers
into corn by examining the grass for dead heads; the vast majority of dead heads will have
been killed by stalk borers who are outgrowing the grass plant and moving into nearby
corn. The more dead heads you find, the more
stalk borers may be poised to move into corn. Tom
Hillyer provided the following pictures.
Smooth
bromegrass head killed by a stalk borer.
Stalk
borer hole in the stem of smooth bromegrass.
Stalk
borer still in the smooth bromegrass stem but about ready to
head for corn.
HAY
Alfalfa
Weevil Winding Down Soon
Alfalfa
weevils have been a very spotty pest of alfalfa this year and they will soon start to
wind down in southern Iowa. Continue
to scout alfalfa for this pest and also monitor re-growth.
Details can be found at https://www.extension.iastate.edu/Pages/eccrops/alfalfaweevil.html.
FOR
YOUR CALENDAR
SOUTHEAST
IOWA RESEARCH and DEMONSTRATION FARM, Crawfordsville
SPRING
FIELD DAY and 25th Anniversary Celebration (afternoon) &
SPECIAL
SESSION FOR CCAs (morning)
JUNE
21, 2012
Details
are posted at https://www.extension.iastate.edu/Pages/eccrops/meetserc.html.
NORTHEAST
IOWA RESEARCH and DEMONSTRATION FARM, Nashua
SPRING
FIELD DAY
JUNE
28, 2012, 1 4:30 p.m.
Details
are posted at https://www.extension.iastate.edu/Pages/eccrops/meetnerf.html.
TECHNIQUES
TO AVOID SPRAY DRIFT
July
17, 2012, Field Extension Education Laboratory (FEEL) near Boone, IA
Two
half-day sessions (morning session repeated in the afternoon) (no cost to participants)
will be conducted, focusing on:
-
Nozzle selection/use with demonstration on spray table
-
Balancing
efficacy and drift
-
Environmental
factors, adjuvants and limitations, field demonstration, etc.
More
information and registration will soon be available at http://www.aep.iastate.edu/.
If you have any questions, please feel free to contact the Iowa State University Extension Office.
Nondiscrimination Statement and Information Disclosures