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The effect of some fungicides and herbicides on ascospore production of Venturia inaequalis (Cke.) Wint.
Author(s) -
HUTTON K. E.,
BURCHILL R. T.
Publication year - 1965
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.1744-7348.1965.tb01236.x
Subject(s) - venturia inaequalis , ascospore , biology , fungicide , horticulture , apple scab , mercury (programming language) , botany , incubation , spore , computer science , programming language , biochemistry
SUMMARY The ascospore productivity of severely scabbed apple leaves was reduced by 93.7–99.9% by a single autumn application of phenylmercuric chloride (PMC) over a concentration range of 0.0025–0.1%. Phenylmercury dimethyl‐dithiocarbamate (PMD) was slightly less effective at equivalent concentrations of mercury. Of the non‐mercury compounds tested, only high concentrations of didecyldimethylammonium bromide and the herbicide diuron approached PMC in effectiveness. Low concentrations of PMC applied in the spring reduced the numbers of ascospores released from leaves bearing mature perithecia. A new technique for estimating the ascospore productivity of overwintered apple leaves is described.