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Bentazon Selectivity in Hot Pepper (Capsicum chinense) and Sweet Pepper (Capsicum annuum)

Published online by Cambridge University Press:  12 June 2017

Aurora M. Baltazar ,
Thomas J. Monaco  and
David M. Peele
Aurora M. Baltazar
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27650
Thomas J. Monaco
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27650
David M. Peele
Affiliation:
R. J. Reynolds Technical Co., Avoca Division, Merry Hill, NC 27957
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Abstract

The susceptibility of sweet pepper (Capsicum annuum L. ‘Keystone Resistant Giant’) and tolerance of hot pepper (Capsicum chinense L. ‘Bohemian Chili’) to bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] was demonstrated under greenhouse and field conditions. Sweet pepper growth and fruit production were inhibited by foliar applications of bentazon at rates of 0.6 to 6.7 kg ai/ha. Severity of injury increased with application rate. Injury symptoms in sweet pepper were leaf chlorosis, with necrosis and death of shoot apices. Foliar applications of bentazon to hot pepper resulted in little or no injury. Bentazon inhibited Hill reaction activity of isolated chloroplasts from both species to a similar extent, suggesting that selectivity of this compound in hot pepper is not due to resistance at the chloroplast level.

Keywords

Mode of actionphytotoxicitytoleranceHill reactionbentazon
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 32 , Issue 2 , March 1984 , pp. 243 - 246
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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