Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom02stev Year: 1910 DISEASES OF SPECIAL CROPS 95 fruit a dirty appearance. The fungus attacks the fruit late in the season, and is strictly superficial. It may be easily rubbed off with a cloth. The loss in ready salability, due to the unsightliness of the fruit, is reason enough for protective spray- ings. The Bordeaux mixture applied at intervals of about two weeks from the middle of June until the middle of August is effec- tive. Flyspeck (Lep- tothyrium pomi (Mont. & Fr.) Sacc.). — Growing upon the surface of th
Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom02stev Year: 1910 DISEASES OF SPECIAL CROPS 95 fruit a dirty appearance. The fungus attacks the fruit late in the season, and is strictly superficial. It may be easily rubbed off with a cloth. The loss in ready salability, due to the unsightliness of the fruit, is reason enough for protective spray- ings. The Bordeaux mixture applied at intervals of about two weeks from the middle of June until the middle of August is effec- tive. Flyspeck (Lep- tothyrium pomi (Mont. & Fr.) Sacc.). — Growing upon the surface of the fruit and forming numerous clustered black specks closely resembling fly specks, this disease causes disfigurement of the apple. Though the disease is of very wide distribution, the loss occasioned by it is not serious and is almost entirely pre- vented by the sprayings employed against other diseases. Coniothyriose (Coniothyriwn Fuckelii, Sacc).—A rot upon fruit very similar to bitter rot, and a twig blight very similar to Sphseropsose is caused also by Coniothy- rium. This disease is of less importance than the others mentioned, and the remedies already given suffice. Volutellose (Volutella frudi S. & EL). — In general Fig. 38.—Apple flyspeck. Original.
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