Vol. 51â1997 - NorthEastern Weed Science Society
Vol. 51â1997 - NorthEastern Weed Science Society Vol. 51â1997 - NorthEastern Weed Science Society
52 1996 EUP RESULTS FOR ISOXAFLUTOLE IN CORN IR. Stachecki, T.E. Vrabel, and C.B. Williams' ABSTRACT I oxaflutole is a member of a new class of isoxazole herbicides from Rhone-Poulenc Ag Compan which disrupt pigment biosynthesis in susceptible plant species. Isoxaflutole is formulat d as a 75 percent water dispersible granule and will be marketed under the trade name of BALAN ETM. An Experimental Use Permit was conducted across 165 locations in the midwest and nort east with the preemergence application of isoxaflutole on field com. Objectives were to demonst ate weed control, crop safety, and crop yield response of isoxaflutole applied either alone 0 in combination with reduced rates of preemergent com herbicides versus commercial preemer ence corn herbicide programs. EUP trials were conducted by Rhone-Poulenc Sales represen atives in conjunction with Rhone-Poulenc Field Development representatives. esults from 195 trials which were conducted indicated minimal crop injury and excellent weed co trol when isoxaflutole was applied at 105 g ai ha- l either alone or in combination with half of e normal use rate of preemergence com herbicides such as acetochlor, metolachlor, alachlor, dimethenamid, atrazine or chloracetamide plus atrazine combinations. These isoxaflu loe treatments provided excellent control of weds such as velvetleaf (Abutilon theophr sti Medik.), common ragweed (Ambrosia artemisiifolia L.), giant ragweed (Ambrosia trifida .) lambsquarters (Chenopodium album L.), redroot pigweed (Amaranthus retroflexus L.), tal waterhemp (Amaranthus tuberculatus (Moq.)ID. Sauer), common waterhemp (Amara thus rudis Sauer), kochia (Kochia scoparia (L.)Schrad.), Pennsylvania smartweed (Polygo m pensylvanicum L.), eastern black nightshade (Solanum ), Venice mallow (Hibiscus trionum L.), wild mustard (Sinapsis arvensis L.), giant foxtail (Setaria faberi Herrm.), green foxtail ( etaria viridis (L.)Beauv.), fall panicum (Panicumdichotomiflorum Michx.), wild proso millet ( 'anicum mileaceum L.), woolly cupgrass (Eriochloa villosa (Thunb.)Kunth) and bamyar grass (Echinochloa crus-galli (L.)Beauv.). Combinations of isoxaflutole plus half of the recomm nded use rate of a chloracetamide herbicide provided excellent control of yellow foxtail (Setaria glauca (L.) Beauv.). Performance of the isoxaflutole treatments was either comparable or supe .or to the overall weed control performance provided by the commercial standard herbicid program as chosen by the individual farmer cooperators. As previously observed in small plot research trials, under dry conditions or in situatio s where weeds emerge due to non uniform application coverage, control of weed seedling less than 5 em tall occurred following rainfall. This "rechargeable activity" was observe occurring in most locations for over 6 weeks following application and was a charact .stic of isoxaflutole which was well received by the farmer cooperators. They also liked the low dose technology of isoxaflutole and the ease of handling the dust free 75 WDG formula ion. one-Poulenc Ag Company, Research Triangle Park, NC 27709
53 PERF011MANICEOF ISOXAFLUTOLE IN PREEMERGENCE AND PREPLANT APPLICATIONS IN CONVENTIONAL TILLAGE CORN T.E. Vrabel, J.P. Cartier, and M. White l ABSTRACT Isoxafl tole is a member of a new class of isoxazole herbicides from Rhone-Poulenc Ag Company whi h disrupt pigment biosynthesis in susceptible plant species. Isoxaflutole is formulated as 75 percent water dispersible granule and will be marketed under the trade name of BALANCErM. Isoxafl tole was evaluated in 1996 in 204 conventional tillage field trials conducted by Rhone-Poulen in the United States. It was evaluated in preemergence, preplant surface applied and preplant ncorporated applications applied either alone or in combination with other herbicides. Re ults from these trials were consistent with past year's performance and show that Isoxaflutole pr vides excellent selective control of both grass and broadleaf weeds in com (Zea mays L.) at 10 use rates. lsoxaflutole applied alone preemergence at rates of 52 to 105 g ai ha- l provided exc lIent control of velvetleaf (Abutilon theophrasti Medik.), common ragweed (Ambrosia art misiifolia L.), giant ragweed (Ambrosia trifida L.) lambsquarters (Chenopodium album L.), r droot pigweed (Amaranthus retroflexus L.), tall waterhemp (Amaranthus tuberculatus oq.)J.D. Sauer), common waterhemp (Amaranthus rudis Sauer), kochia (Kochia scoparia (L.) chrad.), Pennsylvania smartweed (Polygonum pensylvanicum L.), eastern black nightshade (S lanum), Venice mallow (Hibiscus trionum L.), wild mustard (Sinapsis arvensis L.), giant foxt it (Setaria faberi Herrm.), green foxtail (Setaria viridis (L.)Beauv.), fall panicum (Panicum die tomiflorum Michx.), wild proso millet (Panicum mileaceum L.), woolly cupgrass (Eriochloa vi 'losa (Thunb.)Kunth) and barnyardgrass {Echinochloa crus-galli (L.)Beauv.). Performance as comparable whether isoxaflutole was applied preemergence or preplant incorporated. Under dry conditions following preemergence application performance was improved by s allow incorporation of Isoxaflutole Excellent activity on this weed spectrum was observed in ea ly pre plant applications oflsoxaflutole at 140 g ai ha- l applied up to 14 days prior to planting. Under dry conditions or in situations where weeds emerge due to non uniform application co erage, control of weed seedlings less than 5 cm tall occurs following rainfall. This "rechargeable activity" is the result of uptake and translocation of isoxaflutole via the weed's root system a d can be observed on many weed species for over 6 weeks following application. 'Rhon -Poulenc Ag Company, Research Triangle Park, NC 27709
- Page 1 and 2: 1 DE~LOPING BEST MANAGEMENT PRACTIC
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- Page 35 and 36: 35 Effect OfPO~T ApplicationTimingo
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- Page 57 and 58: 57 Weed Interference in Full Season
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- Page 61 and 62: 61 Table 1.Eff ct of WeedControlTre
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53<br />
PERF011MANICEOF ISOXAFLUTOLE IN PREEMERGENCE AND PREPLANT<br />
APPLICATIONS IN CONVENTIONAL TILLAGE CORN<br />
T.E. Vrabel, J.P. Cartier, and M. White l<br />
ABSTRACT<br />
Isoxafl tole is a member of a new class of isoxazole herbicides from Rhone-Poulenc Ag<br />
Company whi h disrupt pigment biosynthesis in susceptible plant species. Isoxaflutole is<br />
formulated as 75 percent water dispersible granule and will be marketed under the trade name of<br />
BALANCErM.<br />
Isoxafl tole was evaluated in 1996 in 204 conventional tillage field trials conducted by<br />
Rhone-Poulen in the United States. It was evaluated in preemergence, preplant surface applied<br />
and preplant ncorporated applications applied either alone or in combination with other<br />
herbicides. Re ults from these trials were consistent with past year's performance and show that<br />
Isoxaflutole pr vides excellent selective control of both grass and broadleaf weeds in com (Zea<br />
mays L.) at 10 use rates. lsoxaflutole applied alone preemergence at rates of 52 to 105 g ai ha- l<br />
provided exc lIent control of velvetleaf (Abutilon theophrasti Medik.), common ragweed<br />
(Ambrosia art misiifolia L.), giant ragweed (Ambrosia trifida L.) lambsquarters (Chenopodium<br />
album L.), r droot pigweed (Amaranthus retroflexus L.), tall waterhemp (Amaranthus<br />
tuberculatus oq.)J.D. Sauer), common waterhemp (Amaranthus rudis Sauer), kochia (Kochia<br />
scoparia (L.) chrad.), Pennsylvania smartweed (Polygonum pensylvanicum L.), eastern black<br />
nightshade (S lanum), Venice mallow (Hibiscus trionum L.), wild mustard (Sinapsis arvensis<br />
L.), giant foxt it (Setaria faberi Herrm.), green foxtail (Setaria viridis (L.)Beauv.), fall panicum<br />
(Panicum die tomiflorum Michx.), wild proso millet (Panicum mileaceum L.), woolly cupgrass<br />
(Eriochloa vi 'losa (Thunb.)Kunth) and barnyardgrass {Echinochloa crus-galli (L.)Beauv.).<br />
Performance as comparable whether isoxaflutole was applied preemergence or preplant<br />
incorporated. Under dry conditions following preemergence application performance was<br />
improved by s allow incorporation of Isoxaflutole Excellent activity on this weed spectrum was<br />
observed in ea ly pre plant applications oflsoxaflutole at 140 g ai ha- l applied up to 14 days prior<br />
to planting.<br />
Under dry conditions or in situations where weeds emerge due to non uniform<br />
application co erage, control of weed seedlings less than 5 cm tall occurs following rainfall. This<br />
"rechargeable activity" is the result of uptake and translocation of isoxaflutole via the weed's<br />
root system a d can be observed on many weed species for over 6 weeks following application.<br />
'Rhon -Poulenc Ag Company, Research Triangle Park, NC 27709
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