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Tulip (Tulipa spp.), Daffodil (Narcissus spp.), and Iris (Iris spp.) Response to Preemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

Kassim A Al-Khatib
Kassim A Al-Khatib*
Affiliation:
N.W. Res. Ext. Cent., Washington State Univ., Mt. Vernon, WA 98273
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Abstract

Broadleaf weed control and tulip, daffodil, and iris response to alachlor, dithiopyr, diuron, isoxaben, napropamide, oryzalin, oxadiazon, oxyfluorfen, pendimethalin, pronamide, and thiazopyr applied preemergence were evaluated. All herbicides controlled broadleaf weeds for five months after application, but control with oxyfluorfen, pendimethalin, alachlor, pronamide, and napropamide decreased six months after application. The greatest weed control was with oxadiazon, isoxaben, thiazopyr, dithiopyr, and diuron, whereas the least weed control was with napropamide and alachlor. In general, tulip was more sensitive to herbicides than daffodil and iris. All herbicides injured tulips at early growth stages but bulb yield of tulip was reduced only by oxadiazon, oxyfluorfen at 0.28 kg ai/ha, pronamide, and dithiopyr. Tulip flower quality was reduced only by oxadiazon, oxyfluorfen at 0.28 lb/ha, and pronamide. Daffodil and iris were tolerant to thiazopyr, isoxaben, pronamide, alachlor, oryzalin, napropamide, and diuron.

Keywords

diuron, N'-(3,4-dichlorophenyl)-N,N-dimethylureanapropamide, N,N-diethyl-2-(1-naphthalenyloxy)propanamideoryzalin, 4-(dipropylamino)-3,5-dinitrobenzenesulfonamideoxyfluorfen, 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzenepronamide, 3,5-dichloro(N-1,1-dimethyl-2-propynyl)benzamidethiazopyrdaffodil, Narcissus spp., ‘Ice Follies’iris, Iris spp., ‘Ideal’tulip, Tulipa spp., ‘Golden Apeldoorn.’AlachlordithiopyrdiuronisoxabennapropamideoryzalinoxadiazonoxyfluorfenpendimethalinpronamidethiazopyrCAPBPMATMTPOLPE
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 710 - 715
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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