Winter wheat, yellow mustard, and spring lentil response to iodosulfuron/mesosulfuron

摘要

Two studies were established near Genesee, Idaho to evaluate winter wheat injury in 2009 and 1) yellow mustard and 2) spring lentil soil carryover response in 2010 to iodosulfuron/mesosulfuron. The experimental design was a randomized complete block with four replications. Each study was planted to 'Brundage 96' winter wheat on October 15, 2008 at 100 Ib/A. AH herbicide treatments were applied to winter wheat in 2009 using a C02 pressurized backpack sprayer calibrated to deliver 10 gpa at 32 psi and3 mph (Table 1). The studies were oversprayed on May 20, 2009 for broadleaf weed control. The future yellow mustard site was treated with pyrasulfotole/bromoxynil at 0.193 lb ai/A, fluroxypyr at 0.117 lb ai/A, and clopyralid at 0.124 lb ai/A. The futurespring lentil site was treated with pyrasulfotole/bromoxynil at 0.193 lb ai/A and fluroxypyr at 0.117 lb ai/A. The accidental inclusion of pyrasulfotole/bromoxynil in the overspray added 0.193 lb ai/A to all treatments including the untreated check. Wheat injury was evaluated visually. Wheat grain was harvested with a small plot combine on August 18, 2009. In 2010, yellow mustard or spring lentil was planted in each study. 'IdaGold' yellow mustard and 'Red Chief spring lentil were direct-seeded on April 26, 2010. Rotational crop injury was evaluated visually and yellow mustard seed was harvested with a small plot combine on August 12, 2010. Spring lentil was not harvested due to a poor crop stand.