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Effects of fungicides on powdery mildew, tree growth and cropping of apple
Author(s) -
LOCKE T.,
ANDREWS LINDA
Publication year - 1986
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1986.tb02009.x
Subject(s) - triadimefon , powdery mildew , fungicide , biology , cultivar , agronomy , shoot , horticulture , orchard , mildew
In a 6‐year orchard experiment, seven fungicide programmes were assessed for control of powdery mildew (Podosphaera leucotricha) and for long‐term effects on growth and cropping of the apple cultivar Cox's Orange Pippin. Programmes based on binapacryl, bupirimate, fenarimol, nitrothal‐isopropyl and triadimefon gave better control than dinocap or triforine. The heaviest cumulative yields of marketable fruit were obtained with the non‐systemic fungicides binapacryl and nitrothal‐isopropyl, the former significantly outyielding triadimefon and triforine over 6 years. Tree vigour, as assessed by extension shoot length and internode length, was found to be better after 4‐5 years of programmes based on binapacryl than on triadimefon or fenarimol. A relation was demonstrated between cumulative marketable yield and mean annual mid‐season incidence of secondary mildew on extension shoot leaves.