Page 311 - PC2019 Program & Proceedings

PLANT CANADA 2019

P195. Exobasidium diseases of Vaccinium spp. in Newfoundland
Jewell, L.; K. Compton; D. Wiseman
AAFC

Members of the genus Exobasidium are responsible for diseases that result in swellings, such as blisters
and galls, and discoloration in a range of plants, including many members of the order Ericales. Most
Exobasidium spp. are host-specific hemibiotrophs. Commercially important diseases caused by
Exobasidium spp. include blister blight of tea (Camellia sinensis; caused by E. vexans) and Exobasidium
fruit and leaf spot of blueberries (Vaccinium spp.; caused by E. maculosum). Athough many Vaccinium
spp. are culturally and commercially important in the province of Newfoundland and Labrador, Canada,
little information is available on the prevalence and importance of Exobasidium diseases in this province.
A survey was thus conducted of managed highbush blueberry (V. corymbosum); managed and
unmanaged lowbush blueberry (V. angustifolium); and unmanaged stands of partridgeberry (V. vitis-
idaea; known by many common names including red berry and lingonberry) and cranberry (V.
oxycoccos). Red leaf diseases were observed on partridgeberry, cranberry, and both highbush and
lowbush blueberries. Exobasidium fruit and leaf spot diseases were observed on both high and lowbush
blueberry. In addition, a disease with symptoms similar to Exobasidium leaf spot but with a singular,
large “blister" rather than multiple spots, was frequently observed on lowbush blueberry. Molecular
characterization of the causal pathogens is underway.

Linda Jewell (linda.jewell@canada.ca)

P196. Revysol ® a new fungicide for horticulture crops and turf
Martens, G.; S. MacDonald; K. Dufton
BASF Canada

Revysol ® fungicide is an innovative active ingredient for crop protection that was discovered and
developed by BASF. Revysol provides outstanding curative and long-lasting preventative control of a
broad range of diseases in numerous key crops worldwide including cereals, corn, soybean, legumes,
potato, horticulture, and turf. Revysol belongs to the group of the sterol biosynthesis inhibitors (SBI);
within the SBIs, it belongs to the sub-group of demethylation inhibitors (DMI) and the chemical group of
triazoles. Revysol is a unique fungicide amongst the triazole group and is the first Isopropanol-Azole. Its
chemical characteristics allow for rapid uptake and steady translocation through the plant. The molecular
shape binds strongly to the target enzyme for effective disease control. Revysol is highly effective
against key fungal diseases in specialty crops including apple, grape, and turf. In research trials
conducted across North America, Revysol was highly effective against apple scab in pome fruit, powdery
mildew in grape, and a variety of diseases in turf. In research trials, disease reduction by Revysol
exceeded commercial standards and improved both yield and quality. Revysol applied to horticulture
crops and turf can be an effective tool to protect crops, manage resistance and increase yield in a
sustainable way. Revysol is not registered by the PMRA but is currently being assessed for registration
under the Pest Control Products Act.

Gerald Martens (gerald.martens@basf.com)

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