Strawberry Disease Management: Fungicides for Fruit Pathogens Steven Koike and Mark Bolda University of California Cooperative Extension Monterey County.

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Presentation transcript:

Strawberry Disease Management: Fungicides for Fruit Pathogens Steven Koike and Mark Bolda University of California Cooperative Extension Monterey County

Foliar Fruit Angular leaf spot Anthracnose Common lf spot Phomopsis lf bl. Leaf blotch Powdery mildew Gray mold Anthracnose Rhizopus rot Mucor rot Leather rot Powdery mildew

Gray mold Anthracnose Rhizopus rot Mucor rot Leather rot Powdery mildew Angular leaf spot Anthracnose Common lf spot Phomopsis lf bl. Leaf blotch Powdery mildew Foliar Fruit

Botrytis / gray mold

Rhizopus

Mucor

Colletotrichum / anthracnose

Fungicides for fruit rots Field trial (3 reps, 4 apps, 150 gal/A) Harvest fruit: yield and cull weights Two post-harvest incubations: –Plastic boxes –Room temperature –Botrytis, Rhizopus, Mucor counts

Treatment/acre% Botrytis Untreated66.5 WRG 400 g41.6 Elevate 1.5 lb36.5 Picoxy 6 fl oz35.2 Fontelis 14 fl oz33.3

Treatment/acre% Rhiz/Mucor Untreated25.1 Q8Y 18 fl oz17.8 V fl oz16.4 Fontelis 24 fl oz fl oz fl oz11.6 Picoxy 12 fl oz 9.3 Pristine 18.5 oz 0.0

Acknowledgments California Strawberry Commission Patty Ayala, Kat Kammeijer, Weston Kile, Laura Murphy, Chris Bettiga Research Team: Mark Bolda, Steven Koike, Dan Legard, Hillary Thomas Thanks to the participating companies.

USDA