Herbicide Tolerance in RiceTec IMI Hybrids

Example 1

FIG. 3 Trial Setup:

Trial consisted of 2 treatment regimens with Imazamox applications at approximately the preflood stage with rates of 0.5×, 1×, 2×, or 4×, either alone or 2 weeks following application of 1× Imazethapyr.

FIG. 4 Representative Pots 4 Weeks Post Application of Imazamox.

Summary:

The results of this trial indicates that RiceTec (RT) IMI hybrids show high levels of tolerance to Imazamox herbicide. No injury was observed in any of the RT IMI hybrids in any treatment. However, injury was observed in the single trait mutant lines. This was expected, because it is known that the G654E mutation only confers a weak level of tolerance to IMI herbicides. Due to the trial being conducted in the greenhouse during the difficult winter season the injury response may not have shown exactly as that of an optimal field trial, but given the consistency of response across all treatments the data indicates that RT IMI hybrids have equal or higher levels of tolerance to Imazamox than current commercial IMI hybrids.