Diseases of plants in the Diseases of plants in the United States in 1939 diseasesofplants128nanc Year: 1941 '';T v. J \::j77ri -f/. : \ i T / '-o.'S' Shaded: JJormal or above. .\-;/ Unshaded:. Belovj normal. Fig. 3. Departure from the normal temperature for the summer; â August 1939i inclusive. V i V, ir:':'-' 1 â¢â â â +!, .../ --â f r: 5 ,-40.' - \

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