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Overview of Plant Disease Diagnoses for 2012

Marion county typically submits between 150 and 250 samples per year. In 2012 most samples came from growers including field crops (sugar beet, mint, ryegrass and wheat), vegetables, woody ornamentals, small fruits, and filbert trees. The biggest problems in field crops we received were Barely yellow dwarf virus in perennial ryegrass, and Verticillium dahliae in mint. Phytophthora root rot and/or crown rot was very common in woody ornamentals and small fruits.

Greenhouse and nursery producers submitted roses and woody ornamentals that had various fungal problems, and abiotic conditions associated with environmental injury or insect feeding.

Homeowners submitted woody ornamentals that had various fungal problems.