Distribusi Penyakit Hawar Daun Bakteri (Xanthomonas axonopodis pv allii) Sebagai Penyakit Baru Pada Tanaman Bawang Di Sumatera Barat

Resti, Zurai and Yanti, Yulmira and Rahma, Haliatur (2014) Distribusi Penyakit Hawar Daun Bakteri (Xanthomonas axonopodis pv allii) Sebagai Penyakit Baru Pada Tanaman Bawang Di Sumatera Barat. Working Paper. Fakultas Pertanian. (Unpublished)

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Abstract

Bacterial blight disease on onion was the important disease on onion and the disease was a new dectection in Indonesia. The disease cause by Xanthomomas axonopodis pv allii, the bacteria was seed borne patogen and could cause symptoms on onion and other Allium species. The symptoms of the disease was detection on onion plant in Sungai Nanam West Sumatera, but we didn`t know distribution of the disease in West Sumatera. The aim of the research was to known distribution of the disease in West Sumatera, to Known incidency and severety of the disease and the characterized the causal bacteria. The research have been done by two phase that was phase 1: survey and observation of bacterial blight disease in sentra produce of onion in West Sumatera. Phase 2: Laboratory research to characterized the causal bacteria (Morfologycal, fisiologycal identification). Variable of the research was Gram test, pectinase test, pigmen xanthomonadine test, hipersensitive reaction test and patogenicity test. Result of this research indicated that bacterial blight disease on onion was distribute in Sentra produse of onion in West Sumatera. Incidency of the disease was 100 % in Kab. Solok and 39,62 % in Kab. Agam. The bacterium causal agent Xaa was Gram negatif, pectinase positive, produse xanthomonadine pigmen, hipersensitive reaction positive and patogenicity test positive.

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