Field Day
*Our annual Field Day will be held August 27, 2008.

FFA Day
*FFA Day will be held September 16, 2008.

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Bruce Burdick
1109 S. Birch St.
Albany, MO 64402
660-726-5610
Email: BurdickB@missouri.edu

Hundley-Whaley Center phone
660-726-3698

Situation: Several studies on pre and post weed controls were conducted at Hundley-Whaley in 1998 that will not be discussed in detail in this report. The reason for this is because each of the treatments provided good to excellent control of all weeds within the study. If very little difference can be shown, the value of showing individual treatments is minimal.

Study C8AC0313 consisted of 13 treatments comparing various Lightning treatments applied to imidazolinone tolerant corn. There was no adverse crop response to any treatment and all treatments except Lightning plus Tough and Lightning plus Aim provided commercially acceptable levels of control for giant foxtail, cocklebur and sunflower. All treatments except Lightning alone and Lightning plus Tough provided good control of common waterhemp in the study.

The two best treatments overall were early post applied Lightning + Prowl + atrazine and Lightning + Marksman which provided 95.8% and 93.5% overall weed control respectively.

Study C8BA1511 was an eleven treatment study comparing post applied dicamba treatments with the standard, Spirit. A new BASF soil applied pre-emergence product, BAS65607 was also compared to Frontier and Dual II Magnum.

The plots consisted of heavy giant foxtail pressure and moderate to heavy cocklebur, sunflower and velvetleaf.

All pre-emergence herbicides (Frontier, Dual II Magnum, BAS 65607 and OpTill), applied at labeled rates provided from 93-98% giant foxtail control. Statistically there was no difference in the grass control provided by these treatments.

The post emergence herbicide treatments did show some differences in control but the differences seemed to relate more to time of application than to the herbicide used. Early post applications did not provide the needed level of persistence for new weed flushes. Overall, post broadleaf weed control treatments made to 6-10" tall corn provided the best broadleaf weed control. All dicamba containing treatments provided 87-100% control of morningglory. Spirit only provided 67% control of morningglory (mix of pitted and ivyleaf).

The plot area was infested with a moderate level of shattercane. As one might expect, treatments containing Beacon or Accent provided near complete control of shattercane. Treatments containing Distinct provided about 70% control and treatments containing Marksman were rated as providing 50% control. Frontier followed by Laddok only provided control ratings of 23% for shattercane.

Corn yields were taken for this experiment and all treatments yielded the same when measured by statistics. Actual corn yields ranged from 122 to 149 bu/acre.

Study C8BD1613 consisted of thirteen treatments that compared Bayer and DuPont treatments. The weed pressure in the study was disappointingly low. There were some differences, however. For example, pre-emergence Axiom plus atrazine treatments provided significantly better cocklebur control than Axiom plus Balance treatments (99% verses 90%). Also ounce of Basis, applied as a pre-emergence herbicide, provided significantly less giant foxtail control than 17 ounces of Axiom (93% verses 100%). Basis at ounce plus 12 ounces of AAtrex 90 provided 100% giant foxtail control when applied pre-emergence.