Effect of relative humidity during mango growth on the incidence of quiescent infections of Alternaria alternata.
Prusky D., Gat Z., Burd P.
Author Affiliation: Department of Fruit and Vegetable Storage, ARO, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel.
Plant Disease 77 : 249-252
Abstract : The quiescent infected area of A. alternata on mango at harvest was closely related to the number of hours of RH?80% during a 52-d period of fruit development in Israel. At least 250 h of RH?80% were needed for a significant quiescent infected area in fruits at harvest. Disease incidence increased as the number of hours of RH?80% over 320 increased. In some groves climatic parameters other than RH appeared to affect disease incidence. It is suggested that a map of av. daily max. RH during fruit growth can be used as a basis for predicting the incidence of black spot in Israel.