Control of Certain Diseases of Greenhouse Vegetables with Ultraviolet-Absorbing Vinyl Film. Tsugio Sasaki, Morioka Branch, Vegetable and Ornamental Crops Research Station, Shimokuriyagawa, Morioka 020-01, Japan. Yuichi Honda, Morioka Branch, Vegetable and Ornamental Crops Research Station, Shimokuriyagawa, Morioka 020-01, Japan; Manabu Umekawa, Agriculture, Forestry and Fisheries Council Secretariat, 1-2-1, Kasumigaseki, Chiyoda-ku, Tokyo 100, Japan; and Masayasu Nemoto, Tohoku National Agricultural Experiment Station, Shimokuriyagawa, Morioka 020-01, Japan. Plant Dis. 69:530-533. Accepted for publication 2 January 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-530.

Certain pathogenic fungi require ultraviolet (UV) radiation for sporulation. The use of UV-absorbing vinyl film for controlling diseases caused by Alternaria dauci, A. porri, A. solani, Botrytis squamosa (UV-induction group) was attributed to elimination of inductive UV radiation. Disease control for Stemphylium botryosum and A. brassicae (light-inhibition group) was accomplished by filtering out UV radiation that would otherwise nullify blue light inhibition.