PERTUMBUHAN, PRODUKSI DAN TINGKAT SERANGAN PENYAKIT BERCAK UNGU ( Alternaria porri ( Ell ) Cif. ) PADA TIGA VARIETAS BAWANG MERAH DENGAN PERLAKUAN PUPUK ORGANIK CAIR DAN Trichoderma harzianum

Attempts of shallot production require fertilizers in right sorts and sufficient quantity, rightdisease control and uses of suitable varieties with enviroment. The research was aimed to know:1) the highest yield of shallot variety at treatments of certain fertilizers and fungicides, 2)different growth and yield of shallot between treatments of liquid organik fertilizer and T.harzianum with inorganic fertilizer and synthetic fungicides, and 3) interaction among shallotvarieties, fertilizers, and fungicide tested when seen from variables on growth and yield ofshallot.It was conducted at rice field after planting rice at Kaligangsa Wetan Village Brebes Subdistric Brebes Regency starting from January until March 2005. The Experimental design usewas factorial Randomized Complete Block Design with three replicates. Data were analyzed byusing F test and if significant then continued by Duncan Multiple Range Test.The result showed 1) the Yellow variety genetically was shorter than Bima and Philipinevarieties, whereas between Bima and Philipine varieties showed indifferently in term of plantheight, 2) the three varieties tested had relatively similar response to fertilizer and fungicidetreatments for variables of disease intensity, numbers of leaves and clumps, 3) the inorganicfertilizer yielded better plant height reaching 4,39% than the organik ones, 4) the organikfertilizer could suppress the purple spot disease up to 6.35% compared to inorganic fertilizer, 5)the mankozeb fungicide (Dithane M-45) could more suppress the purple spot disease until 3.19%than T. harzianum at plant height variable, 6) the tested fungicide (mankozeb and T. harzianum)produced similar bulb yield, either wet or dry bulb weight, 7) there was no different responseamong the three varieties in treatments of fertilizers and fungicides seen from wet and dry bulbweight variables, 8) the inorganic fertilizer produced bulb yield Bima variety (144.85 g of wetbulb weight and 115.17 g of dry bulb weight) and Philipine variety (144.95 gof wet bulb weightand 115.25 g of dry bulb weight) heighter when compared to Yellow variety (142.35 g of wetbulb weight and 112.95 g of dry bulb weight), whereas the treatment of organic fertilizer did notshow differently on the bulb weight.Key Words : pertumbuhan, produksi, tingkat serangan penyaki