![]() ![]() Cogongrass visual control, shoot biomass, rhizome biomass, rhizome depth, and total nonstructural carbohydrate (TNC) content were sampled during the course of the study. Treatments were applied in May, August, or October for 3 consecutive yr, and the May glyphosate treatment included a second annual application each October. Herbicide treatments included glyphosate at 4.48 kg ai ha −1, imazapyr at 0.84 kg ai ha −1, and a tank mix of glyphosate and imazapyr at the same rates. A field study to evaluate specific herbicide treatments and application timings for cogongrass patch eradication was conducted at two locations in southwestern Alabama. Cogongrass has a persistent, thick rhizome mat but an ephemeral seedbank therefore, successful eradication methods must largely focus on the rhizomes. Although numerous studies have examined cogongrass control, no published studies, to our knowledge, have tested strategies for cogongrass eradication. Cogongrass, an invasive grass native to Asia, has infested thousands of hectares in the southeastern United States. ![]()
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