01198naa a2200217 a 450000100080000000500110000800800410001910000190006024500460007926000090012552006810013465000110081565000220082665000120084865000120086065000110087270000140088370000140089770000170091177300520092820323602015-12-23       1954    bl ---       0--  u    #d1 aYARWOOD, C. E.  aTemperature relations of powdery mildews.  c1954  aPowdery mildew of barley (Erysiphe graminis DC. on Hordeum vulgare L.), powdery mildew of bean (E. polygoni DC. on Phaseolus vulgaris L.), powdery mildew of pea (E. polygoni on Pisum sativum L.), powdery mildew of cantaloupe and cucumber (E. cichoracearum DC. on Cucumis melo L. and C. sativus L.), and powdery mildew of grape (Uncinula necator [Schw.] Burr. on Vitis vinifera L.) were maintained on plants growing in the greenhouse in Berkeley. Work with clover powdery mildew (E. polygoni on Trifolium pratense L.) was principally conducted at Purdue University, Lafayette, Indiana. The three strains of E. polygoni above listed are distinct, morphologically and culturally.  aCevada  aDoença de Planta  aErvilha  aFeijão  aOídio1 aSIDHY, S.1 aCOHEN, M.1 aSANTILLI, V.  tHilgardiagv. 22, n. 17, p. 603-622, Mar. 1954.