Plant Disease (2006) 90, 481-486

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Jose L. Henriquez, David Sugar and Robert A. Spotts (2006)
Induction of cankers on pear tree branches by Neofabraea alba and N. perennans, and fungicide effects on conidial production on cankers
Plant Disease 90 (4), 481-486
Abstract: Cankers formed on pear branches after inoculations with mycelia of Neofabraea alba or N. perennans, causal agents of bull's eye rot of pear fruit. The highest proportions of successful infections followed inoculations made in fall and winter. Cankers induced by N. perennans were larger than those induced by N. alba. Small, superficial cankers were obtained after inoculations with conidia of N. perennans on wounded branches of pear trees. Sporulation of both pathogens on mycelial-induced cankers occurred throughout the year, with the largest amount of conidia produced at the end of summer and during fall. Sporulation on cankers induced by N. perennans spanned at least 2 years. Copper sulfate reduced sporulation on cankers induced by N. alba, while copper sulfate, trifloxystrobin, and ziram applied to sporulating cankers reduced germination of conidia of N. perennans.
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Database assignments for author(s): David Sugar

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
control - general


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Phlyctema vagabunda Pear (Pyrus)
Neofabraea perennans Pear (Pyrus)