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Chemical control of the frog‐eye disease ( Cercospora nicotianae ) of tobacco ( Nicotiana tabacum ) in Nigeria
Author(s) -
FAJOLA A. O.,
ALASOADURA S. O.
Publication year - 1973
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1973.tb07741.x
Subject(s) - biology , fungicide , cercospora , nicotiana tabacum , germination , spore germination , phytophthora nicotianae , horticulture , leaf spot , agronomy , botany , biochemistry , phytophthora , gene
SUMMARY Six fungicides‐Bordeaux mixture, Verdasan, Tillex, Coprantol, Karathane and Dithane M 45‐were evaluated for the control of the spore germination of Cercospora nicotianae , causing the frog‐eye disease of tobacco. Four of these were also tried against artificial infection in the greenhouse and two against natural infection in the field during three growing seasons of the crop in Southern Nigeria. The results of the laboratory evaluations were in general agreement with those obtained from the greenhouse and field trials. It was found that Dithane M 45 had a higher fungicidal value and tenacity than the other fungicides tested, and gave the best control of the disease. A marked luxuriant growth induced by Dithane M 45 on treated plants is reported and discussed.