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Three herbicides, Puma, Achieve and Osprey, have been registered for the control of Littleseed Canarygrass in the last five years. Another, Pinoxaden, is being developed and should be registered in the next few years. These herbicides were compared for weed control and crop safety. All produced very good to excellent levels of control although crop injury, especially when tank mixed with broadleaf herbicides, was significant.

Four herbicides and combinations of these herbicides with MCPA were evaluated for the control of Littleseed canarygrass in durum wheat. The currently registered herbicides, Achieve and Puma (not registered in Arizona) produced control levels of 80 to 95 percent with good crop safety. The new herbicides being developed, Osprey and Olympus produced higher and more consistent levels of control of 95 to 99 percent but caused slight to moderate crop injury. Combinations of Achieve and Puma with MCPA, a broadleaf herbicide, resulted in decreased control. When Osprey was tank mixed with MCPA, crop injury was increased.

There are currently three herbicides registered for the control of littleseed canarygrass in the desert southwest. Hoelon was used with marginal success from 1982 to 1999. In 1999, Achieve was registered in Arizona and Puma was registered in California for the control of this weed in wheat and barley. Both have produced good to excellent levels of control (75 to 95 percent) in our tests and under commercial conditions. Two newer herbicides, Olympus (formerly Bayer MKH6561) and F130060 (Aventis) are being developed and have produced excellent levels of canarygrass control in our tests with less crop safety.

Nine herbicide treatments were evaluated for the control of mature nettleleaf goosefoot in durum wheat that was ten days from harvest. The only effective treatments were combinations of Glyphosate (Roundup Ultra Max and Touchdown) and Paraquat (Gramoxone). Applications of Aim, Gramoxone, and Glyphosate alone were ineffective.

Fourteen herbicide treatments were evaluated for the control of littleseed canarygras in durum wheat. Hoelon produced marginal (65%) control, Achieve fair (77%), Control and Puma good (92%) control. Tank mixes of Achieve and Puma with MCPA and Aim resulted in reduced canarygrass control. New ALS inhibitors, Olympus and F130060, produced good to excellent (85 to 95%) control except when mixed with crop oil concentrate and liquid nitrogen.