Influence of Herbicide and Application Timing on Blackberry Control

Abstract

Blackberry is a troublesome species across much of the southeastern United States. Control of blackberry with the pyridine herbicides is often variable among different locations. Experiments were conducted to determine whether application timing, either spring or fall, affected efficacy of the pyridine herbicides triclopyr, fluroxypyr and picloram, and metsulfuron. The pyridine herbicides provided greater control when applied in the fall. At 12 mo after treatment, fluroxypyr plus picloram and fluroxypyr plus triclopyr provided 83% control when applied in the fall and 65% when applied in the spring. Conversely, metsulfuron provided 85% control, and application timing was not significant. Although metsulfuron effectively controls blackberry, it is also highly injurious to bahiagrass. Therefore, chlorosulfuron was tested to determine whether it would provide blackberry control while not injuring bahiagrass. Blackberry control with chlorosulfuron was similar to metsulfuron. These data indicated blackberry control in bahiagrass pastures can be effectively accomplished with chlorosulfuron.

Fall Herbicide Treatments Reduce Northern Dewberry (Rubus flagellaris ) Stem Density in Tall Fescue Pastures and Haylands

“…McCarty et al (12) reported that applications of triclopyr alone at rates from 0.42 to 1.1 kg/ha provided from 48 to 83% visual control of highbush blackberry ( Rubus argutus Link) 10 to 12 MAT. Ferrell et al (6) also found that triclopyr (1.1 kg/ha), triclopyr + fluroxypyr (0.82 + 0.27 kg/ha), and picloram plus fluroxypyr (0.65 + 0.52 kg/ha) provided approximately 65 to 80% visual control of upright, cane‐type blackberry ( Rubus spp.) while metsulfuron (0.02 kg/ha) provided approximately 90% control of this species 12 MAT.…”

“…Fixed model effects included herbicide treatments, while random effects included environment, replications (nested within environments), and all interactions with environment and replications. Considering environments as random enables inferences about the treatments to be made over a range of environments (2).…”

“…The addition of glyphosate (0.34 kg/ha) and 2,4‐D (0.53 kg/ha) to triclopyr (0.63 kg/ha) did not increase highbush blackberry control (12). Ferrell et al (6) also found that metsulfuron (0.02 kg/ha) provided 82% control of upright cane‐type blackberry ( Rubus spp.) species 24 months after treatment (MAT) with either a spring or fall application; however, it was noted that fall herbicide applications were less variable and more consistently controlled blackberry species compared to spring applications.…”

“…species 24 months after treatment (MAT) with either a spring or fall application; however, it was noted that fall herbicide applications were less variable and more consistently controlled blackberry species compared to spring applications. Spring applications of fluroxypyr plus picloram (0.52 + 0.65 kg/ha), triclopyr plus fluroxypyr (0.82 + 0.27 kg/ha), and triclopyr (1.1 kg/ha) alone resulted in less than 45% control 24 MAT; however, fall applications resulted in 65 to 75% control (6). Similarly, Meyer and Bovey (13) found that metsulfuron alone or with 2,4‐D (0.56 kg/ha) provided good control of southern dewberry ( Rubus trivialis Michx.…”

Herbicide Treatment and Application Method Influence Root Sprouting in Chinese Tallowtree (Triadica sebifera)

“…These include aminocyclopyrachlor, aminopyralid, fluroxypyr, and imazamox. These chemistries have recently been shown to have considerable utility in weedy and invasive plant management (Enloe et al 2008(Enloe et al , 2012Fast et al 2009;Ferrell et al 2009;Minogue et al 2011), and they warrant testing on this woody species. Therefore, our objective was to evaluate the response of Chinese tallowtree to several new herbicides applied via multiple individual plant treatment (IPT) techniques, including cut stump, foliar, and basal bark treatment methods.…”