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Controlling Two Sprangletop (Leptochloa spp.) Species with Preemergence Herbicides

  • Lambert B. McCarty (a1), D. Wayne Porter (a2), Daniel L. Colvin (a3), Donn G. Shilling (a3) and David W. Hall (a4)...

Abstract

Field and greenhouse studies were conducted to evaluate selected PRE-applied herbicides for sprangletop control. In greenhouse studies, oxadiazon and dithiopyr provided excellent (> 89%) red sprangletop (L. filiformis) control. Pendimethalin and metolachlor + atrazine provided good (80–89%) to excellent control for 6 mo and 2 mo during studies 1 and 2, respectively. Isoxaben and atrazine provided poor (< 70%) control during both greenhouse studies. In field studies, good to excellent bearded sprangletop (L. fascicularis) control followed dithiopyr, pendimethalin, metolachlor, and metolachlor + atrazine treatments. Dithiopyr at 0.8 kg ai/ha provided best (> 95%) sprangletop control throughout the 6-mo testing period. Under field conditions, control was inconsistent following oxadiazon with good to excellent control during one study and poor control in another study. Better or equal control than metolachlor + atrazine followed dithiopyr, pendimethalin, and metolachlor alone treatments. Oxadiazon also provided similar or better control than metolachlor+atrazine in three of four studies. Over all studies, dithiopyr provided best sprangletop control, followed by metolachlor, metolachlor + atrazine, pendimethalin, and oxadiazon. Isoxaben and atrazine treatments provided poorest or inconsistent sprangletop control.

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Keywords

Controlling Two Sprangletop (Leptochloa spp.) Species with Preemergence Herbicides

  • Lambert B. McCarty (a1), D. Wayne Porter (a2), Daniel L. Colvin (a3), Donn G. Shilling (a3) and David W. Hall (a4)...

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