Articles
HERBICIDE EVALUATION IN BULBOUS IRIS, NARCISSUS, AND TULIP
Article number
266_75
Pages
561 – 568
Language
Abstract
Several herbicides, including cinmethylin, DPX-L5300, DPX-M6316, fenoxan, imazethapyr, isoxaben, and lactofen, were evaluated for phytotoxicity and weed control efficacy on bulbous iris, narcissus, and tulip over a three-year period.
Compared to the industry standards of oryzalin and a combination of chlorpropham plus dinoseb, only cinmethylin applied preemergence to the bulbs was consistent each year in controlling a broad spectrum of weeds without reducing bulbous iris, narcissus, and tulip yield.
Lactofen, applied preemergence to the bulbs, was selective on bulbous iris and narcissus, however, it had a limited weed control spectrum and would need to be combined with other herbicides to be effective.
Compared to the industry standards of oryzalin and a combination of chlorpropham plus dinoseb, only cinmethylin applied preemergence to the bulbs was consistent each year in controlling a broad spectrum of weeds without reducing bulbous iris, narcissus, and tulip yield.
Lactofen, applied preemergence to the bulbs, was selective on bulbous iris and narcissus, however, it had a limited weed control spectrum and would need to be combined with other herbicides to be effective.
Postemergence applications of cinmethylin or lactofen were ineffective in controlling weeds and, in the case of lactofen, caused significant yield reductions in bulbous iris, narcissus, and tulip.
DPX-L5300, DPX-M6316, fenoxan, imazethapyr, and isoxaben caused excessive bulb injury.
Publication
Authors
Stott W. Howard, Carl R. Libbey, Eric R. Hall
Keywords
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