. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Some Diseases of Beans. 297 water heated to 122° F., while dry beans can endure such a temperature for some time without injury. While this gives some promise of success the treatment is open to many of the objections raised in the case of the anthracnose (See page 291). Selection of clean seed.— The sorting of seed affected with anthrac- nose has been shown to be highly desirable. Its value in the case of seed affected with blight is very questionable.
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Some Diseases of Beans. 297 water heated to 122° F., while dry beans can endure such a temperature for some time without injury. While this gives some promise of success the treatment is open to many of the objections raised in the case of the anthracnose (See page 291). Selection of clean seed.— The sorting of seed affected with anthrac- nose has been shown to be highly desirable. Its value in the case of seed affected with blight is very questionable. Owing to the fact that blight- aft'ected seeds are often not discolored, it is manifestly impossible to sort them from the healthy ones. The safest method is to discard all seed known to have come from fields that showed the disease. Destnicfioii of diseased tops; rotation.— In regard to these practices says, "A field where beans have sickened with this dis- ease is unfit for growing beans for at least one season, as the germ lives over at least one winter in the stems and leaves left on the ground. How long such a field may re- main infected is un- known, for we do not A-et know whether the Mqceliutn. '"Kj germ can live and in- crease in the soil where no beans are growing, although this is probable. Bean straw from in- fected fields may be burned. If it is fed to animals or itsed in bed- ding, the manure shotild be returned to the field on which the beans grew, and not spread on fields as yet free from the cFis- ; S p r a y i n g.—At the New Jersey Experiment Station, Dr. Halsted has experimented for a num- ber of years with several spray mixtures for the prevention of bean blight. The Bordeaux mixture of the strength recommended for the anthracnose has been found to be very satisfactory. Probably a larger number of applications will be necessary for the blight than for the anthracnose. Leaf Tissue Fig. 114.—Diagrammatic section a
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