Start Date
30-8-2017 11:15 AM
End Date
30-8-2017 11:30 AM
Description
Abstract.
New Jersey produced 27 million kg of cranberries in 2015 at a farm value of $22 million (USDA 2017). Cranberry beds in New Jersey are concentrated in the Pine Barrens coastal plain where soil conditions (sandy texture, pH 4.0 to 5.0, good drainage) are optimal for cranberry production. The perennial nature of cranberry production predisposes the crop to a diversity of weed species ranging from herbaceous weeds to woody perennial species. Among perennial weed species, Carolina redroot has been an increasing source of concern for New Jersey cranberry growers regarding the lack of sufficient control from their current management strategies. Carolina redroot is a perennial herbaceous monocotyledonous species member of the Haemodoraceae family whose common name is derived from the orange to red coloration of its roots and rhizome. Information regarding herbicidal control of Carolina redroot is extremely limited and mostly restricted to blueberry production (Myers et al. 2013). In order to address the issues of successfully managing Carolina redroot under extremely specific environmental and cropping conditions, a study was initiated in 2017 for evaluating the efficiency of ten postemergence herbicides to control Carolina redroot. Diquat at 560 g ai ha-1 provided over 90% control up to 21 days after treatment (DAT) but declined after 42 DAT with the emergence of new shoots. Control with mesotrione at 280 or 560 g ai ha-1 increased from less than 15% 14 DAT to 97% 63 DAT. Control increased from 14 to 63 DAT with flumioxazin at 210 g ai ha-1 (73%) and 2,4-D at 1,280 g ae ha-1 (60 %) whereas glyphosate at 1,260 g ae ha-1 did not achieve more than 48% control 63 DAT. Other herbicides tested (pronamide at 2,240 g ai ha-1, clopyralid at 70 or 140 g ai ha-1, quinclorac at 1,280 g ae ha-1, carfentrazone at 35 g ai ha-1, and fomesafen at 420 g ai ha-1) provided less than 30% control from 21 DAT onwards. Control of Carolina redroot rhizomes/roots was greatest in plants treated with mesotrione (> 95%), glyphosate (90%), diquat (89%), 2,4-D (84%), and flumioxazin (78%). Non treated Carolina redroot shoot and root/rhizome fresh weight were 5.8 and 7.7 g, respectively. Greatest shoot and root/rhizome biomass reductions were noted with diquat, mesotrione at 280 or 560 g ai ha-1, glyphosate, 2,4-D, and flumioxazin (0.7 and 0.7 g, 0.4 and 1.8 g, 0.3 and 1.2 g, 0.8 and 1.1 g, 1.1 and 1.3 g, 1.5 and 1.5 g, respectively). Clopyralid at 70 or 140 g ai ha-1 and fomesafen also reduced root/rhizome fresh weight (4.8, 5.7, and 3.1 g, respectively) but did not decrease shoot biomass. No secondary shoots growing from the rhizome were noted for plants treated with glyphosate, mesotrione, 2,4-D and flumioxazin.
Recommended Citation
Besancon, Thierry; Carr, Baylee; and Oudemans, Peter, "Screening of POST herbicides for controlling Carolina redroot (Lachnanthes caroliana) in New Jersey cranberry beds" (2017). North American Cranberry Researcher and Extension Workers Conference. 20.
https://scholarworks.umass.edu/nacrew/2017/papers/20
Included in
Screening of POST herbicides for controlling Carolina redroot (Lachnanthes caroliana) in New Jersey cranberry beds
Abstract.
New Jersey produced 27 million kg of cranberries in 2015 at a farm value of $22 million (USDA 2017). Cranberry beds in New Jersey are concentrated in the Pine Barrens coastal plain where soil conditions (sandy texture, pH 4.0 to 5.0, good drainage) are optimal for cranberry production. The perennial nature of cranberry production predisposes the crop to a diversity of weed species ranging from herbaceous weeds to woody perennial species. Among perennial weed species, Carolina redroot has been an increasing source of concern for New Jersey cranberry growers regarding the lack of sufficient control from their current management strategies. Carolina redroot is a perennial herbaceous monocotyledonous species member of the Haemodoraceae family whose common name is derived from the orange to red coloration of its roots and rhizome. Information regarding herbicidal control of Carolina redroot is extremely limited and mostly restricted to blueberry production (Myers et al. 2013). In order to address the issues of successfully managing Carolina redroot under extremely specific environmental and cropping conditions, a study was initiated in 2017 for evaluating the efficiency of ten postemergence herbicides to control Carolina redroot. Diquat at 560 g ai ha-1 provided over 90% control up to 21 days after treatment (DAT) but declined after 42 DAT with the emergence of new shoots. Control with mesotrione at 280 or 560 g ai ha-1 increased from less than 15% 14 DAT to 97% 63 DAT. Control increased from 14 to 63 DAT with flumioxazin at 210 g ai ha-1 (73%) and 2,4-D at 1,280 g ae ha-1 (60 %) whereas glyphosate at 1,260 g ae ha-1 did not achieve more than 48% control 63 DAT. Other herbicides tested (pronamide at 2,240 g ai ha-1, clopyralid at 70 or 140 g ai ha-1, quinclorac at 1,280 g ae ha-1, carfentrazone at 35 g ai ha-1, and fomesafen at 420 g ai ha-1) provided less than 30% control from 21 DAT onwards. Control of Carolina redroot rhizomes/roots was greatest in plants treated with mesotrione (> 95%), glyphosate (90%), diquat (89%), 2,4-D (84%), and flumioxazin (78%). Non treated Carolina redroot shoot and root/rhizome fresh weight were 5.8 and 7.7 g, respectively. Greatest shoot and root/rhizome biomass reductions were noted with diquat, mesotrione at 280 or 560 g ai ha-1, glyphosate, 2,4-D, and flumioxazin (0.7 and 0.7 g, 0.4 and 1.8 g, 0.3 and 1.2 g, 0.8 and 1.1 g, 1.1 and 1.3 g, 1.5 and 1.5 g, respectively). Clopyralid at 70 or 140 g ai ha-1 and fomesafen also reduced root/rhizome fresh weight (4.8, 5.7, and 3.1 g, respectively) but did not decrease shoot biomass. No secondary shoots growing from the rhizome were noted for plants treated with glyphosate, mesotrione, 2,4-D and flumioxazin.