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Smutgrass (Sporobolus poiretii) Control in South Florida

Published online by Cambridge University Press:  12 June 2017

P. Mislevy  and
W. L. Currey
P. Mislevy
Affiliation:
Agric. Res. Center, Ona, FL 33865
W. L. Currey
Affiliation:
Univ. of Florida, Gainesville, FL 32601
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Abstract

Various chemical and cultural treatments were evaluated for smutgrass [Sporobolus poiretii (R.&S.) Hitchc], control and their effects on pangolagrass (Digitaria decumbens Stent.) and bahiagrass (Paspalum notatum Flügge). Herbicide treatments were dalapon (2,2-dichloropropionic acid) at 1.7, 3.3, and 5.0 kg/ha with Sunoco HE spraying oil at 0, 9.4, 19.0 and 37.0 L/ha. Five weeks after herbicide treatment plots were clipped (clipped vs. nonclipped) and fertilized (0 vs. 112 kg/ha N). Increasing dalapon from 1.7 to 5.0 kg/ha increased smutgrass control and decreased the number of smutgrass plants/plot. Pangolagrass ground cover generally increased with fertilization, as the rate of dalapon increased up to 3.9 kg/ha. Bahiagrass ground cover decreased with rates of dalapon above 1.7 kg/ha. Increasing the rate of oil increased bahiagrass ground cover after 90 days. Nitrogen applied 5 weeks after dalapon treatment and semi-annually for 5 yr generally decreased ground cover of smutgrass and bahiagrass, but increased pangolagrass. Clipping treated smutgrass plants increased pangolagrass and bahiagrass ground cover while decreasing the ground cover of smutgrass.

Keywords

Perennial grasspastureDigitaria decumbensPaspalum notatumdalaponspraying oil
Type
Research Article
Information
Weed Science , Volume 28 , Issue 3 , May 1980 , pp. 316 - 320
Copyright
Copyright © Weed Science Society of America 

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References

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