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Tropical Soda Apple (Solanum viarum) Control

Published online by Cambridge University Press:  12 June 2017

J. Jeffrey Mullahey ,
John A. Cornell  and
Danny L. Colvin
J. Jeffrey Mullahey
Affiliation:
Wildlife and Range Sci. Dep., Southwest Florida Res. Educ. Cent., Univ. Florida, EFAS, P.O. Drawer 5127, Immokalee, FL 33934
John A. Cornell
Affiliation:
Dep. Stat., Univ. Florida, IFAS, Gainesville, FL 32611
Danny L. Colvin
Affiliation:
Dep. Agron. Univ. Florida, JFAS, Gainesville, FL 32611
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Abstract

Hexazinone (1.12 kg ai/ha), triclopyr (1.12 kg ai/ha), metsulfuron (0.008 kg ai/ha), dichlorprop + 2,4-D, glyphosate (2.8%), and triclopyr (2%) + diesel oil (98%), applied as a broadcast or spot (individual plant) treatment, were evaluated over two years in south Florida for tropical soda apple (TSA) control and their effects on grass ground cover. For broadcast treatments, triclopyr (98%) and hexazinone (93%), had significantly (P < 0.05) higher percent control of marked TSA plants 90 d after herbicide application. However, triclopyr (99%) had significantly higher grass ground cover than hexazinone (78%). Hexazinone severely damaged Pangola digitgrass, but had no effect on bahiagrass. For spot treatments, dichlorprop + 2,4-D (100%) had the highest percent total control of TSA and least effect on grass ground cover (96%) 90 d after herbicide application, followed by glyphosate (96% control) and triclopyr + diesel oil (95% control). Based on acceptable (>90%) TSA control and grass ground cover, triclopyr broadcast or dichlorprop + 2,4-D spot provided the greatest control. With either application method, repeated herbicide applications will be necessary to eliminate TSA because of rapid seedling emergence following control of existing plants.

Keywords

Dichlorprop, (+)-2-(2,4-dichlorophenoxy)propanoic acid2,4-D, (2,4-dichlorophenoxy)acetic acidhexazinone, 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dionemetsulfuron, 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]-carbonyl]amino]sulfonyl]benzoic acidtriclopyr, [(3,5,6-trichloro-2-pyrindinyl)oxy]acetic acidbahiagrass, Paspalum notatum Flugge # PASNOPangola digitgrass, Digitaria decumbens Stent # DIGDE, tropical soda apple, Solanum viarum DunalDichlorprop2,4-DhexazinonemetsulfurontriclopyrDigitaria decumbensPaspalum notatumDIGDEPASNO
Type
Research
Information
Weed Technology , Volume 7 , Issue 3 , September 1993 , pp. 723 - 727
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

Literature Cited

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