Comparative efficacy of different copper fungicide formulations and spraying methods in controlling abnormal leaf fall disease of Hevea brasiliensis - Idicula S P; Edathil T T; Jacob C K; Krishnankutty V (In: Recent Trends in Plant disease control.(Eds. H.B. Singh, D.N. Upadhyay and L.R. Saha), Today and Tomorrow Publishers, New Delhi, pp. 55-62)