Influence of Three Citrus Herbicides on Potential Production of Sorghum bicolor 'Topper 76-6' as a Bioenergy Crop.
Planting bioenergy crops on land previously used for citrus production may offer an alternative source of revenue for growers looking for alternative-to-citrus crops. However, residual herbicides used in citrus production may adversely affect alternative crops. This study evaluated effects of three herbicides (bromacil, norflurazon, and simazine) commonly used in citrus production on the bioenergy crop Sorghum bicolor 'Topper 76-6'. Plants were exposed to herbicides in soil for 1-5 weeks and observations of effects on photosynthetic quantum yield, leaf greenness, height, and biomass were made. Results indicate that concentrations of bromacil and norflurazon greater than 0.09 and 0.07 mg/kg and simazine >0.46 mg/kg will impair growth and development in similar soils. Concentrations below these may also be toxic.
Soil and Water Science Department, University of Florida/IFAS, P.O. Box 110290, Gainesville, FL, 32611, USA. pcwilson@ufl.edu.
Patrick C
PC
Wilson
Indian River Research and Education Center, University of Florida/IFAS, 2199 South Rock Road, Fort Pierce, FL, 34945, USA.
Barrett
B
Gruber
Indian River Research and Education Center, University of Florida/IFAS, 2199 South Rock Road, Fort Pierce, FL, 34945, USA.
Youjian
Y
Lin
Indian River Research and Education Center, University of Florida/IFAS, 2199 South Rock Road, Fort Pierce, FL, 34945, USA.
Prem
P
Kumar
Indian River Research and Education Center, University of Florida/IFAS, 2199 South Rock Road, Fort Pierce, FL, 34945, USA.
David
D
Niebch
Environmental Horticulture Department, University of Florida/IFAS, P.O. Box 110670, Gainesville, FL, 32611-0670, USA.
Sandra
S
Wilson
D056804:Biofuels / Q000600:supply & distribution*; D001976:Bromouracil / Q000031:analogs & derivatives* / Q000633:toxicity; D018556:Crops, Agricultural / Q000187:drug effects* / Q000254:growth & development*; D006540:Herbicides / Q000633:toxicity*; D011724:Pyridazines / Q000633:toxicity*; D012839:Simazine / Q000633:toxicity*; D012989:Soil Pollutants / Q000633:toxicity; D045868:Sorghum / Q000187:drug effects* / Q000254:growth & development*
D056804:Biofuels; D006540:Herbicides; D011724:Pyridazines; D012989:Soil Pollutants; D001976:Bromouracil; C004590:bromacil; C008677:norflurazone; D012839:Simazine
Bromacil; Herbicide; Norflurazon; Simazine; Sorghum; Toxicity