INVESTIGATION AND MEASUREMENT OF FIELD DISEASES OF GERBERA (Gerbera jamesonii L.) IN BANGLADESH ....

From February to May 2019, an experiment was done in the Jashore area of Bangladesh to detect and identify field illnesses of gerbera plants and flowers. The Plant Disease Clinic at Sher-e-Bangla Agricultural University in Dhaka, Bangladesh, conducted the research. For the field survey, eighteen villages from four unions in Jashore district's Jhikorgacha Upazila were considered. Each village's three fields were thoroughly inspected. Under natural epiphytic conditions, the disease incidence and severity were documented. The field condition revealed eleven illnesses and anomalies in total. Six fungal disorders were researched further in the lab, and the causative organism was isolated and identified. Alternaria alternata caused leaf spot, Botrytis cinerea caused leaf blight, Fusarium oxysporum f. sp. chrysanthemi caused stem rot, Rhizoctonia solani caused crown rot, Botrytis cinerea caused flower blight, and Alternaria alternata and Bipolaris sp. caused petal spot. Furthermore, foot and root rot, leaf curl, mosaic, flower curl, and flower abnormality, a physiological problem, were found in fields, but the pathogenic organisms and causes of the diseases were not investigated. The rates of disease occurrence and severity ranged from 0-56 percent and 0-26 percent, respectively. In Bangladesh, the principal illnesses of gerbera plants were leaf spot, leaf blight, flower blight, and flower abnormalities, based on disease incidence and severity.

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