Symptomatology, survey and surveillance of citrus gummosis disease caused by Phytophthora spp.

An extensive roving survey was conducted in different districts of Marathwada region of Maharashtra state to isolate the pathogen associated with the gummosis of sweet orange. In all 103 sweet orange orchards surveyed the average disease incidence of 38.83 per cent had been observed. Highest disease incidence and severity noticed in Nanded district (63.38%) followed by Jalna (58%), Parbhani (50.66%), Hingoli (46.66%), Aurangabad (39.11%) and Latur (14%). The lowest disease incidence noticed in Osmanabad district (10%). Peak period of disease expression was August-September that was concomitant with heavy rainfall, high humidity percentage and temperature range of 18 oC – 35 oC. The harvest of disease free fruits was increased in adopted orchards

Keywords:

Sweet orange , , Survey , Surveillance , Gummosis , , Phytophthora spp