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Late blight ( Phytophthora infestans (Mont) De Bary) development from potato seed-pieces treated with fungicides by Kirk, William W; Niemira, Brendan A; Stein, Jeffrey M; Hammerschmidt, Raymond is a Agricultural and Biological Sciences article available to read on EtoBox.

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Fungicides were applied as seed-piece treatments to control potato late blight, caused by Phytophthora infestans, US8, A2 biotype in controlled environment and ®eld experiments. Ef®cacy of seed treatments for controlling late blight was examined under three disease development regimes simulated by arti®cal inoculation; (a) seed-borne infection, (b) transmission of infection resulting from spread during the seed-cutting operation, and (c) infection of foliage by aerial inoculation. Emergence of plants from the seed-borne infection was uniformly low (`40%) in controlled environment and ®eld experiments. In controlled environment experiments some of the plants that emerged from fungicide-treated seed-pieces were infected with late blight. Following exposure of tuber surfaces to P infestans, emergence rates from seed-pieces treated with formulated products that included mancozeb in the formulation were comparable to the untreated and non-inoculated control in controlled environment and ®eld experiments. Plants that emerged from non-inoculated seed-pieces treated with fungicides that contained active ingredients known to be effective against foliar late blight had lower percentage folia

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Author

Kirk, William W; Niemira, Brendan A; Stein, Jeffrey M; Hammerschmidt, Raymond

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1526-498X)

Published

1999

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)