AIM AND CALLISTO ON SWEETCORN

Richard Greenland


           Two new herbicides have promise for weed control in sweetcorn. There is some concern that some sweetcorn hybrids may be injured by these new herbicides. We tested the sweetcorn hybrids received for the sweetcorn performance trials for their tolerance to Aim and Callisto.


MATERIALS AND METHODS


           The experimental procedure was the same as for the sweetcorn hybrid performance trials (see Sugar enhance sweetcorn performance trial or Supersweet sweetcorn performance trial). The outside rows of each plot were sprayed with either Aim EC + NIS (0.5 oz/acre + 0.25% v/v) or Callisto + NIS (3 oz/acre + 0.25%) on June 14 when the sweetcorn was 3 (sh2) to 5 (se) inches tall and had 3 to 4 leaves. The sweetcorn in the outside rows was harvested at the same time as the center rows were harvested. Because the herbicide treated rows were the outside rows they would have experienced greater influence from adjacent plots than the middle rows from where the regular sweetcorn harvest was taken.


RESULTS


           Callisto did not injure any sweetcorn and did not reduce yield or affect any characteristics of the sweetcorn. Aim burned the leaves of all the sweetcorn shortly after application. This injury disappeared in about two weeks. Aim slightly reduced yield in supersweet sweetcorn but not in sugar enhanced sweetcorn. This is the opposite of what happened in 2003 when the sugar enhanced sweetcorn was affected and the supersweet was not affected by Aim.

            Aim was applied the same day to both types of sweetcorn, but the supersweet sweetcorn was younger and smaller than the sugar enhanced sweetcorn. The Aim label allows for applications from before planting up to the 8-leaf collar growth stage.

 

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