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Greg D. Hoyt and David W. Monks

Experiments were conducted to evaluate the effect of tillage systems and weed management on weed suppression and potato yield. Strip-tillage (ST) and conventional-tillage (CT) systems produced equal yields of Irish potato (Solanum tuberosum L.) or sweetpotato [Ipomoea batatas (L.) Lam.] when herbicide treatments were applied. Weeds in the nontreated control reduced yield of Irish potato and prevented storage root growth in sweetpotato. Excellent control of broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash], henbit (Lamium amplexicaule L.), prickly sida (Sida spinosa L.), and common ragweed (Ambrosia artemisiifolia L.) was obtained with metribuzin + metolachlor applied preemergence at Irish potato planting, followed by sethoxydim + crop oil applied postemergence in ST and CT systems. Redroot pigweed (Amaranthus retroflexus L.) control was >98% at 4 weeks after treatment but was 73% to 84% at harvest across all herbicide treatments in both tillage systems. In sweetpotato, control of black mustard [Brassica nigra (L.) W.J.D. Koch], goosegrass [Eleusine indica (L.) Gaertn.], and fall panicum [Panicum dichotomiflorum Michx.] was >95% throughout the growing season for all herbicide treatments in both ST and CT.

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Dennis C. Odero, Jose V. Fernandez, and Nikol Havranek

control and 100% being crop death or complete weed control at 14 and 28 DAT. Prevalent weed species were common lambsquarters ( Chenopodium album L.), spiny amaranth ( Amaranthus spinosus L.), and fall panicum ( Panicum dichotomiflorum Michx.) at

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Nader Soltani, Peter H. Sikkema, John Zandstra, John O'Sullivan, and Darren E. Robinson

., Setaria spp., fall panicum ( Panicum dichotomiflorum ), proso-millet ( Panicum miliaceum ), and goosegrass ( Eleucine indica ), including ALS, glyphosate, and triazine-resistant biotypes ( Anonymous, 2006 ). The currently registered POST herbicides in

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Sarah R. Sikkema, Nader Soltani, Peter H. Sikkema, and Darren E. Robinson

., 2004 ; Geier and Stahlman, 2004 ). Pyroxasulfone may also provide superior control of some annual grasses such as wild proso millet ( Panicum miliaceum ), fall panicum ( Panicum dichotomiflorum ), and crabgrass ( Digitaria spp.) ( Anonymous, 2006

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Darren E. Robinson, Nader Soltani, Christy Shropshire, and Peter H. Sikkema

[ Setaria glauca (L.) Beauv.], barnyard grass [ Echinochloa crusgalli (L.) Beauv.], fall panicum ( Panicum dichotomiflorum Michx.), common lambsquarters ( Chenopodium album L.), redroot pigweed ( Amaranthus retroflexus L.), common ragweed ( Ambrosia

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Elsa Sánchez, William J. Lamont Jr, and Michael D. Orzolek

spp.), fall panicum ( Panicum dichotomiflorum ), and crabgrass ( Digitaira spp.). In both years, weed populations were highest in control plots and lowest when shredded newspaper was used ( Table 2 ). Newspaper sheets and straw mulch provided

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Jared A. Hoyle, J. Scott McElroy, and Elizabeth A. Guertal

faberi ) and fall panicum ( Panicum dichotomiflorum ) Weed Sci. 45 423 425 Holm, R.H. 1972 Volatile metabolites controlling germination in buried weed seeds Plant Physiol. 50 293 297 Krueger, R.R. Shaner, D.L. 1982 Germination and establishment of

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Xi Xiong, Ken Diesburg, and Daniel T. Lloyd

( Echinochloa crusgalli L.), fall panicum ( Panicum dichotomiflorum L.), giant foxtail ( Setaria faberi L.), and large crabgrass ( Digitaria sanguinalis L.), responded similarly to glufosinate and glyphosate ( Tharp et al., 1999 ). When applied on dormant

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Bernard H. Zandstra, Sylvia Morse, Rodney V. Tocco, and Jarrod J. Morrice

powell amaranth ( Amaranthus powellii ) in Michigan asparagus fields ( Heap, 2012 ). Other common annual weeds found in asparagus fields include field sandbur ( Cenchrus incertus ), large crabgrass ( Digitaria sanguinalis ), fall panicum ( Panicum

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Dennis C. Odero and Alan L. Wright

, respectively. Weed populations in 2011 and 2012 ( Table 1 ) comprised common lambsquarters, spiny amaranth ( Amaranthus hybridus L.), common purslane ( Portulaca oleracea L.), goosegrass [ Eleusine indica (L.) Gaertn.], fall panicum ( Panicum dichotomiflorum