Response of gerbera cultivar against Alternaria leaf spot, thrips and mortality rate under different growing structure

An experiment was conducted to screen ten varieties of Gerbera against the thrips, Alternaria Leaf spot and mortality rate under different growing structure. The experiment was conducted in College of Horticulture, Mysuru during 2017-2018 and investigation consists of10 treatments and each treatment was replicated thrice. The cultivar Ambra under shadehouse recorded maximum mortality rate (54.55%), followed by Luxes (35.42%), Bonnie (31.63%) and Rosella (31.92%) under same conditions. Cvs Bonnie and Ariyana under both polyhouse and shadehouse condition, and others Ambra, Cassiana, Devil, Rosella, Sciella grown under polyhouse were showing resistance to Alternaria leaf spot.The per cent leaf damage due to thrips was minimum (2.89%) in Cv. Sciella, followed by Carocci (3.41%) grown under polyhouse condition. While it was maximum in cultivars Cassiana (37.22%) and Alberino (33.67%) grown under shadehouse.