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Shallots especially Topo shallot cultivar was one of the strategic horticulture commodities which had high economical valued for farmer in North Molluca. Cultivation of shallot is mostly contrained bt basal rot disease caused by fungus Fusarium spp. complex. The aim of study is to determine Topo shallots response and it’s resistance to basal rot disease. The research using Topo shallots with comparative cultivars of Biru, Tiron, and Lembah Palu. The results showed that Topo shallots centrally location at Trans Koli SP – 1, Tidore Kepulauan Regency and Tutuling Jaya, East Halmahera Regency showed the basal rot disease symptoms which is being twisted, pale and yellowing. The disease incidence and disease intensity were 61,75 % and 77,50 % in Trans Koli SP – 1, while in Tutuling awa were 62,09 % and 70 %. Resistance tests showed that disease incident of Blue, Tiron, Lembah Palu and Topo were 74,40%, 64,80%, 77 % and 65%, respectively. The resistance level of Topo is not better than Biru, Tiron, and Lembah Palu. The response of Topo’s shallots resistance against basal rot disease is seen through the accumulation of lignin in the shallots plate.

Response and Resistance Mechanism of Shallot Var. Topo, a North Molluca’s Local Variety Against Basal Rot Disease