Red River IPM Update
New!!
Current mapping of Sugarbeet Root Maggot Populations in the Red River Valley!!
Early Season Scouting for Soybean Aphids
May, 2002 - Cutworms in Sugarbeets
Both Dingy and Army cutworms overwinter as caterpillars, while both darksided and redbacked cutworms overwinter as eggs. A comparison of Black and Dingy cutworms appears below. Note the “V”-shaped markings on the back of the Dingy cutworm.
Photo appears courtesy of Dr. Marlin Rice and Iowa State
University.
Foliar applications labled for treating cutworms in sugarbeets include:
|
Insecticide |
Dosage in LB AI/Acre |
Product Per Acre |
Restrictions |
|
Asana
XL* (Seedling
Spray) |
0.03-0.05 |
5.8-9.6
fl.oz |
21
day PHI, do not exceed 1.5 lb ai/ac per season. Do
not repeat more often than every 14 days. Do not apply more than a total of 3
quarts per acre per crop. |
|
Carbaryl
(Sevin) |
1.5 |
1.5
qt. |
Do
not apply within 28 days of harvest. Up to 2 applications per season are
allowed. Do not repeat more often than every 14 days. Do not apply more than
a total of 3 quarts per acre per crop. |
|
Chlorpyrifos (Lorsban
4E or Nufos 4E)* |
1.0 |
1
qt. |
Apply
by air or ground equipment in sufficient water for good coverage. Do not
apply within 30 days of harvest. Do not allow livestock to graze in treated
areas nor harvest treated beet tops as feed for meat or dairy. animals within 30 days after last
treatment. Field re-entry interval is 24 hours. Fields must be posted. |
|
Lannate
LV* |
0.22
– 0.9 |
0.75
– 3.0 pt |
This
treatment is suggested for control of variegated cutworm only. Do not apply
within 7 days of harvest. Do not feed tops to livestock within 30 days of
last application. Field re-entry interval is 48 hours. Fields must be posted. |
|
Lannate
SP* |
0.22
– 0.9 |
0.25
– 1 lb |
This
treatment is suggested for control of variegated cutworm only. Do not apply
within 7 days of harvest. Do not feed tops to livestock within 30 days of
last application. Field re-entry interval is 48 hours. Fields must be posted. |
|
Mustang
1.5EW* |
0.028
– 0.05 |
2.4
– 4.3 oz |
Do
not apply within 50 days of harvest (tops or roots). Do not apply more than
0.15 pound active ingredient per acre per season. Apply by air or ground
equipment using sufficient water to obtain full coverage of foliage (minimum
of 2 gallons/ac by air and 10 gallons/ac by ground). Field re-entry interval
is 12 hours. Fields must be posted. |
Always read and follow label instructions.
Sleceted Past IPM Updates
June 20, 1999 -
Potato Leafhopper, Grasshoppers, Cereal Insects
Sept 12, 1999 -
Impact of Aster Yellows on Canola May be Greater Than You Think
Aug 31, 1998 -
Lygus in Sugarbeets
July/Aug, 2000 -
Armyworm Outbreak in RRV
Fall, 2000 - Soybean
Aphid, A New Insect Pest in Minnesota Soybeans
Fall, 2001 - Soybean Aphid in NW Minnesota
August, 2001 - Lygus in Sugarbeets
Publications Available for Download
Insects
Grasshoppers -
Minnesota Grasshopper
Management - 2002 with color graphics
Minnesota Grasshopper
Management Brochure with scouting and control information (available as a
PDF file designed to be as a tri-fold brochure).
Scouting -
Early Season Scouting for Soybean Aphids -
A guide to scouting early season soybeans for soybean aphid.
Scouting for Insects
in Wheat, Alfalfa, and Soybeans - a manual prepared for the University of
Minnesota Extension Service Field School, held at the Northwest Experiment
Station, Crookston, MN, July 7-8, 1998.