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Response of Broccoli (Brassica oleracea) Cultivars to Post-Transplant Oxyfluorfen

Published online by Cambridge University Press:  12 June 2017

Mark W. Farnham  and
Howard F. Harrison Jr.
Mark W. Farnham
Affiliation:
U.S. Dep. of Agric., Agric. Res. Serv., U.S. Vegetable Laboratory, 2875 Savannah Hwy., Charleston, SC 29414-5334
Howard F. Harrison Jr.
Affiliation:
U.S. Dep. of Agric., Agric. Res. Serv., U.S. Vegetable Laboratory, 2875 Savannah Hwy., Charleston, SC 29414-5334
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Abstract

Broccoli cultivars were evaluated for differential response to oxyfluorfen applied postemergence (0.1 to 1.6 kg ai/ha) in the greenhouse and post-transplant (0.125 to 1.0 kg/ha) in a spring and a fall field study. One cultivar, ‘Green Goliath,’ was injured more by oxyfluorfen than other cultivars in all environments. ‘Pinnacle,’ was consistently less injured than others. ‘Early Dawn’ and ‘Emerald City’ were intermediate in response to oxyfluorfen. At application rates of 0.25 kg/ha or less, all cultivars recovered sufficiently from injury to produce broccoli heads of equal weight and quality as controls. Cultivars differed in their tolerance of oxyfluorfen at rates above 0.25 kg/ha. Late-maturing cultivars (i.e., Pinnacle) usually recovered from injury to yield similarly to hand-weeded plots while early-maturing cultivars were more likely to show yield losses. Broccoli cultivars possess sufficient tolerance to oxyfluorfen applied post-transplant for weed control. Appropriate choice of cultivar will enhance its utility.

Keywords

Oxyfluorfen, 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzenebroccoli, Brassica oleracea L. var. italica.Cole cropsherbicide injuryherbicide tolerance
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 385 - 391
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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