Safening of native grass to herbicides by using carbon bands.

摘要

Greenhouse and field experiments were conducted to evaluate the use of a carbon band to provide a "safe zone" for seedling emergence and growth of three native grass species. 'KIKA677' streambed bristlegrass germplasm, 'Alamo' switchgrass, and 'Waelder' shortspike windmillgrass germplasm were used in combination with several PRE- and POST-applied herbicides including cloransulam, flumioxazin, imazapic, imazethapyr, and 2,4-D. In a greenhouse experiment, switchgrass emergence was improved when a carbon band was used with imazapic or imazethapyr at 0.04 and 0.07 kg ai ha-1 or 2,4-D at 2.12 kg ae ha-1. Windmillgrass emergence was improved when carbon was used in combination with flumioxazin at 0.05 and 0.1 kg ai ha-1, imazapic at 0.04 and 0.07 kg ha-1, imazethapyr at 0.07 kg ha-1, and 2,4-D at 1.06 kg ha-1, whereas bristlegrass emergence was improved when carbon was used in combination with flumioxazin at 0.1 kg ai ha-1, imazapic at both rates, and imazethapyr at 0.04 kg ha-1. Field studies indicated that flumioxazin at 0.05 and 0.1 kg ha-1, imazapic at 0.04 kg ha-1, and imazethapyr at 0.04 and 0.07 kg ha-1, were safened for bristlegrass and switchgrass emergence when used with carbon. Windmillgrass emergence and growth were improved when carbon was used in combination with flumioxazin at 0.1 kg ha-1.CAS Registry Numbers 104098-48-8 81335-77-5 1929-73-3 2008-39-1 25168-26-7 2569-10-9 3599-58-4 5742-19-8 94-11-1 94-75-7 94-80-4