Vol. 51â1997 - NorthEastern Weed Science Society
Vol. 51â1997 - NorthEastern Weed Science Society Vol. 51â1997 - NorthEastern Weed Science Society
54 PE ORMANCE OF ISOXAFLUTOLE AS A PREEMERGENCE AND BURNDOWN HERBICIDE IN NO TILL CORN T.E. Vrabel, J.P. Cartier, and J.R Collins 1 ABSTRACT I oxaflutole is a member of a new class of isoxazole herbicides from Rhone-Poulenc Ag Compan which is formulated as a 75 percent water dispersible granule. Isoxaflutole is formulated as a 75 percent water dispersible granule and will be marketed under the trade name of BALAN ETM.It is ideal for use in no till and minimum till applications since it does not tie up on surface ash and does not photodegrade. I oxaflutole was evaluated in 1996 in 27 no till field trials conducted by Rhone-Poulenc in the Unit d States. It was evaluated in preemergence, preplant and bumdown applications applied either al ne or in combination with other herbicides. Results from these trials have shown that isoxaflu le provided excellent selective control of both grass and broadleaf weeds in com (Zea mays L. at low use rates. Isoxaflutole applied alone preemergence at 105 g ai ha" provided excellen control of velvetleaf (Abutilon theophrasti Medik.), common ragweed (Ambrosia artemisi olia L.), lambsquarters (Chenopodium album L.), redroot pigweed (Amaranthus retroj1e s L.), common waterhemp (Amaranthus rums Sauer), bamyardgrass (Echinochloa crus-ga i (L.)Beauv.), Pennsylvania smartweed (PolygonumpensylvanicumL.) and giant foxtail (Setaria 'aberi Herrm.). Combinations of isoxaflutole at 105 g ai ha" with either 1.4 kg ai ha·1 metolac or or 1.12 kg ai ha" acetochlor provided excellent control of the aforementioned weeds and add control of yellow foxtail (Setaria glauca (L.) Beauv.). These treatments provided compar Ie control to full rate applications of atrazine plus metolachlor or atrazine plus acetachl r. replant applications of isoxaflutole at 140 g ai ha·1applied in combination with either 2.2 I ha·1cr oil surfactant, 0.5% v/v non ionic surfactant, 0.38 kg ai 2,4-D or 0.56 kg ai glyphosate provide excellent bumdown control of difficult to control weeds such as dandelion (Taraxacum officina Webber in Wiggers) and marestail (Conyza canadensis(L.) Cronq.) and excellent preemer ence control of weeds such as velvetleaf, common waterhemp, Pennsylvania smartweed, commo ragweed, lambsquarters, barnyardgrass, giant foxtail and green foxtail. These treatments provide excellent weed control when either water or 28% nitrogen solution was used as the herbicid carrier. one-Poulenc Ag Company, Research Triangle Park, NC 27709
55 ISOXAFL OLE COMBINATIONSWITH PREEMERGENCEHERBICIDES FOR ANNUALWEEDCONTROLIN FIELD CORN Frank J. Himmelstein, Robert J. Durgy 1 ABSTRACT Isoxaf utole (Balance) has been shown to be an effective weed contro option in Connecticut field corn (Zea mays L.) trials. Two 1996 field trials conducted in Bolton and Lebanon, CT evaluated s ven preemergence herbicides applied alone and in combination with isoxaflutole. The studies were split plot designs wit three replications. The main plots were isoxaflutole applied at .75 and 1.5 oz ai/A and the preemergence herbicide (PRE)treatm nts applied alone. The sUb-plot treatments and applied rat s were: thiafluamide + metribuzin [(Axiom) 0.32 and 0.64 lb ai/ ], metolachlor [(Dual II) 1 and 2 lb ai/A], dimethenami [(Frontier) 0.59 and 1.17 lb ai/A], acetochlor [(Harness) .88 and 1.75 lb ai/A], alachlor [(Lasso MT) 1 and 2 lb ai/A], a etochlor + safener [(Surpass) 0.9 and 1.8 lb ai/A], and pendime halin [(Prowl) 0.75 and 1.5 lb ai/A]. Herbicides were applied wit a C02 backpack sprayer delivering 20 gpa at 32 psi. Weed contro was assessed by visual ratings, and weed biomass samples tak n from a 2.25 ft 2 quadrat from the center of each plot. Weed pecies included common lambsquarters [Chenopodium album L.], edroot pigweed CAmaranthus retroflexus L.), common ragweed ( rosia artemisiifolia L.], velvetleaf (Abutilon theophrasti Medik.) and giant foxtail [Setaria faberi Herrm.]. Common ragw ed was the dominant weed at the Bolton site. Excellent c mmon ragweed control was obtained with the isoxaflutol treatment combinations as indicated by the weed ratings and weed biomass samples taken 53 and 90 OAT, respectivel • Average common ragweed dry matter yields were reduced 99% with the isoxaflutole combinations, and 5% for the PRE treatme ts compared to the check. Giant foxtail and redroot pigweed wer the dominant weeds at the Lebanon site, however, velvetleaf, common lambsquarters, and common ragweed proliferated where these weeds were controlled. Weed ratings taken 36 OAT indicated t e isoxaflutole treatment combinations resulted in greater co rol (>90%) of all five weed species compared to the PRE treatme ts alone. Average control of giant foxtail, velvetleaf, common lambsquarters, redroot pigweed and common ragweed wi the PRE treatments alone was 85%, 24%, 35%, 73% and 12% respectively. Weed biomass samples taken 79 OAT indicated there were 0 significant differences in the average giant foxtail an redroot pigweed biomass between the isoxaflutole treatment mbinations and the PRE treatments alone. The average velvetleaf, common lambsquarters, and common ragweed biomass was significan ly greater for the PRE treatments alone compared to the isoxafl tole treatment combinations. Isoxaflutole shows great promise fo broadspectrum weed control alone and in combination with reduc rates of other preemergence herbicides. Extension ducator-Integrated Crop Management, and Res. Asst., respectivel , University of connecticut, Storrs, CT 06269
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54<br />
PE<br />
ORMANCE OF ISOXAFLUTOLE AS A PREEMERGENCE AND BURNDOWN<br />
HERBICIDE IN NO TILL CORN<br />
T.E. Vrabel, J.P. Cartier, and J.R Collins 1<br />
ABSTRACT<br />
I oxaflutole is a member of a new class of isoxazole herbicides from Rhone-Poulenc Ag<br />
Compan which is formulated as a 75 percent water dispersible granule. Isoxaflutole is formulated<br />
as a 75 percent water dispersible granule and will be marketed under the trade name of<br />
BALAN ETM.It is ideal for use in no till and minimum till applications since it does not tie up on<br />
surface ash and does not photodegrade.<br />
I oxaflutole was evaluated in 1996 in 27 no till field trials conducted by Rhone-Poulenc in<br />
the Unit d States. It was evaluated in preemergence, preplant and bumdown applications applied<br />
either al ne or in combination with other herbicides. Results from these trials have shown that<br />
isoxaflu le provided excellent selective control of both grass and broadleaf weeds in com (Zea<br />
mays L. at low use rates. Isoxaflutole applied alone preemergence at 105 g ai ha" provided<br />
excellen control of velvetleaf (Abutilon theophrasti Medik.), common ragweed (Ambrosia<br />
artemisi olia L.), lambsquarters (Chenopodium album L.), redroot pigweed (Amaranthus<br />
retroj1e s L.), common waterhemp (Amaranthus rums Sauer), bamyardgrass (Echinochloa<br />
crus-ga i (L.)Beauv.), Pennsylvania smartweed (PolygonumpensylvanicumL.) and giant foxtail<br />
(Setaria 'aberi Herrm.). Combinations of isoxaflutole at 105 g ai ha" with either 1.4 kg ai ha·1<br />
metolac or or 1.12 kg ai ha" acetochlor provided excellent control of the aforementioned weeds<br />
and add control of yellow foxtail (Setaria glauca (L.) Beauv.). These treatments provided<br />
compar Ie control to full rate applications of atrazine plus metolachlor or atrazine plus<br />
acetachl r.<br />
replant applications of isoxaflutole at 140 g ai ha·1applied<br />
in combination with either 2.2<br />
I ha·1cr<br />
oil surfactant, 0.5% v/v non ionic surfactant, 0.38 kg ai 2,4-D or 0.56 kg ai glyphosate<br />
provide excellent bumdown control of difficult to control weeds such as dandelion (Taraxacum<br />
officina Webber in Wiggers) and marestail (Conyza canadensis(L.) Cronq.) and excellent<br />
preemer ence control of weeds such as velvetleaf, common waterhemp, Pennsylvania smartweed,<br />
commo ragweed, lambsquarters, barnyardgrass, giant foxtail and green foxtail. These treatments<br />
provide excellent weed control when either water or 28% nitrogen solution was used as the<br />
herbicid carrier.<br />
one-Poulenc Ag Company, Research Triangle Park, NC 27709
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