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Fertilizer and Downy Brome (Bromus tectorum) Effect on Russian Wheat Aphid (Diuraphis noxis) in Winter Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

James M. Krall ,
Stephen D. Miller ,
Larry E. Bennett  and
David E. Legg
James M. Krall
Affiliation:
Dep. Plant, Soil Insect Sci., Univ. Wyo., Laramie, WY 82071
Stephen D. Miller
Affiliation:
Dep. Plant, Soil Insect Sci., Univ. Wyo., Laramie, WY 82071
Larry E. Bennett
Affiliation:
Dep. Plant, Soil Insect Sci., Univ. Wyo., Laramie, WY 82071
David E. Legg
Affiliation:
Dep. Plant, Soil Insect Sci., Univ. Wyo., Laramie, WY 82071
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Abstract

Downy brome serves as an alternative host for Russian wheat aphid (RWA) in winter wheat. In field studies, downy brome infestations of 5 and 39 plants per m2 increased RWA-infested winter wheat tillers 1.4 to 2.8 times that seen in non-infested plots, respectively. RWA-infested winter wheat tillers were not reduced consistently by fertilization. Chlorpyrifos reduced the number of RWA-infested winter wheat tillers to 15 to 43% of untreated wheat. Insecticide efficacy was not influenced by downy brome infestation or by fertilizer either band- or broadcast-applied.

Keywords

Chlorpyrifos, 0, 0-diethyl O-(3,5,6-trichloro-2-pyridinyl) phosphorothioatedowny brome, Bromus tectorum L. # BROTERussian wheat aphid, Diuraphis noxis Mordvilkowheat, Triticum aestivum L. ‘Buckskin’Deep-band fertilizationsurface-broadcast fertilizationchlorpyrifosBromus tectorumDiuraphis noxisTriticum aestivumBROTE
Type
Research
Information
Weed Technology , Volume 7 , Issue 3 , September 1993 , pp. 670 - 673
Copyright
Copyright © 1993 by the Weed Science Society of America 

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