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Differential Effect of Fungicides on Ozone Injury and Brown Spot Disease of Tobacco
Author(s) -
Reinert Richard A.,
Spurr Harvey W.
Publication year - 1972
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1972.00472425000100040027x
Subject(s) - maneb , fungicide , benomyl , horticulture , cultivar , ozone , nicotiana tabacum , toxicology , chemistry , biology , mancozeb , organic chemistry , biochemistry , gene
The differential effects of fungicidal applications on the incidence of ozone injury and injury from Atlernaria alternata Fr. Keissel infection on tobacco Nicotiana tabacum L. leaves were investigated. Spray applications of methyl 1‐butylcarbamoyl‐2‐benzimidazolecarbamate (benomyl) were made to two cigar wrapper cultivars, ‘Bel W 3 ’ and ‘Florida 2612’ in the field. Applications of dodecylguanidine acetate (dodine) and manganous ethylenebisdithiocarbamate (maneb) were also observed on tobacco cultivar Bel W 3 . The ozone and A. alternata injuries were observed before and after fungicidal applications. All of the fungicidal applications significantly decreased ozone injury to tobacco leaves. Benomyl was most effective, decreasing leaf injury by 59%. Maneb and dodine were less effective. Maneb significantly decreased brown spot by 66% and benomyl and dodine produced smaller decreases in brown spot. The results demonstrated the differential responses of these two leaf diseases to fungicidal applications.