The influence of fungicide sprays on infection of apple cv. Bramley's seedling by Nectria galligena

• Published in: European journal of plant pathology Vol. 105; no. 8; pp. 783 - 790
• Main Author: Cooke, L.R. (Queen's Univ. of Belfast, Belfast (United Kingdom). Dept. of Agriculture for Northern Ireland)
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01.11.1999; Springer Nature B.V
• Subjects: apple scab; Apples; Autumn; Biological and medical sciences; Chemical control; Control; CONTROL DE ENFERMEDADES; CONTROLE DE MALADIES; Copper; copper oxychloride; DISEASE CONTROL; dithianon; FONGICIDE; Fruit trees; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; FUNGICIDAS; FUNGICIDES; hexaconazole; MALUS; myclobutanil; NECTRIA GALLIGENA; penconazole; Phytopathology. Animal pests. Plant and forest protection; PLANTULAS; PLANTULE; SEEDLINGS; Sprays; Spring; Summer; Plant pathogen; Mycosis; Rosaceae; Sprinkling; Malus domestica; Fungi; Infection; Nectria galligena; Antifungal agent; Dicotyledones; Angiospermae; Chemical control; Ascomycetes; Spermatophyta; Fruit tree; Thallophyta; Cultivar
• ISSN: 0929-1873; 1573-8469
• DOI: 10.1023/A:1008778900607

In 1990, a long-term trial was initiated by planting young apple trees, cv. Bramley's Seedling, inoculated, at single sites in the leader shoots, with Nectria galligena. The effect of spring-summer and autumn fungicide spray programmes, applied during 1991-1993, on the development of new cankers was assessed up to May 1994. Spring-summer fungicide programmes, applied as for the control of apple scab, reduced numbers of new cankers by between 65% and 76% compared with the untreated control. Sterol demethylation inhibiting fungicides (hexaconazole, myclobutanil, penconazole) had a similar effect on canker to dithianon. Autumn application of copper oxychloride at 5% and 50% leaf-fall further reduced numbers of new cankers. The combination of a spring-summer benzimidazole (carbendazim or thiophanate-methyl) with a scab fungicide (dithianon) and autumn copper oxychloride did not improve canker control compared with applying copper oxychloride after spring-summer myclobutanil+mancozeb. The percentage of fruit which developed rots in long-term storage was decreased by spring-summer benzimidazole application, but not by other fungicide programmes even those which achieved similar levels of canker control.[PUBLICATION ABSTRACT]