Studies on the Dynamics of Powdery Mildews on Cucurbits in Haryana, India

This study considered the occurrence of powdery mildew on cucurbits in Haryana and determined the identity of causal species of the disease in the state. Eleven cucurbits were found infected in one or the other locality in the study area of the state which comprised six districts located distantly. Bottle gourd (Lagenaria siceraria) was most severely affected crop. While Citrullus lanatus was least affected as comparision to other cucurbits. A wild cucurbit, Coccinia cordifolia, was also severely affected. Teleomorphs of the pathogen were found on L. siceraria and Cucumis melo. Utilizing anamorph and teleomorph characters, the species responsible for the disease in the state were identified as Podosphaera xanthii and Golovinomyces cichoracearum. Pathogenecity spectrum of disease in states is similarto several other states in India.