Skip to main content
ARS Home » Midwest Area » Morris, Minnesota » Soil Management Research » Research » Publications at this Location » Publication #96331
Title: LIMITING FOXTAIL SEED PRODUCTION FOLLOWING WHEAT HARVEST

Author
item KEGODE, GEORGE - UNIVERSITY OF MINNESOTA
item Forcella, Frank
item DURGAN, BEVERLY - UNIVERSITY OF MINNESOTA

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 9/8/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Green and yellow foxtail (Setaria viridis and S. glauca) seed production following harvest of spring wheat is a major concern of wheat producers in the west central states. Experiments were conducted in 1996 and 1997 in three tillage systems: no till (NT), chisel plow (CP),and moldboard plow (MP), at the University of Minnesota West Central Experiment Station, Morris, MN, to determine whether tillage operations or glyphosate applications made after wheat harvest could reduce post harvest foxtail seed production. In both years, hard red spring wheat was planted in late-April to simulate early season planting for the west central states. When wheat seedlings were at the three to four leaf stage a combination of fenoxaprop + 2,4-D ester + MPCA ester was applied for grass and broadleaf weed control. Foxtail plant densities were determined prior to wheat harvest and highest populations were in CP plots. Following wheat harvest each plot was subdivided into seven subplots. One subplot was disked twice at four and six days after wheat harvest (DAH),in 1996 and 1997, respectively. Each of five other subplots had glyphosate applied on different days(3,8,16, 23, and 30 DAH in 1996; 1,9,16,23,and 31 DAH in 1997) and one subplot was the control. Foxtail seeds were collected from the soil surface using a portable vacuum cleaner at first frost and the number of green and yellow foxtail seeds determined thereafter. Tillage done immediately after wheat harvest eliminated foxtail plants and no new foxtail seedling emergence occurred from the soil even though post-harvest conditions in 1997 were ideal for emergence. Most viable foxtail seeds were obtained in NT plots. By applying glyphosate within 16 DAH, post harvest foxtail seed production can be reduced by greater than 70%.