Show R rotation 0 tation to prevent disorders of beans hand pick disease free pods to use for seeding plant benns beans on the same land not oftener than once in three or four years particularly if disease has haa been prevalent soils which once become thoroughly infected as a result of continuous cropping anre seldom safe to uso use tor for the same saino or closely related crops for years to come wherever practical destroy all diseased vines and trash by burning if the bean straw from diseased vines la III to bo be fed do not use the manure on a field that Is to bo be planted to beans beano As far as possible avoid cultivate cultivating ing the behns early in the morning when there Is dew on them or when they are wet with rain land pick disease tree free pods or if possible select disease free plants for seed use these to plant a seed plot on land which has never raised beans beano and which la Is removed some distance from the main crop remember that hand picking of seed as it comes from the flail or thrasher for the purpose of controlling disease Is of no value since it la is impossible to detect even a small percent percentage age of diseased seed seed treatment of beans la Is of no practical value since any chemical that would penetrate the seed deeply enough to destroy the dis disease ease prodoc ing organism would likewise be apt to kill the seed spraying with b bordeaux mixture 5 4 50 for formula even w when hen done thoroughly by competent persons Is at best unsatisfactory unprofitable and only partially success successful f ay walter alter G colorado experiment sackett bacteriologist peri ment station |