Tanggap Beberapa Varietas Tanaman Bawang Merah Terhadap Penyakit Hawar Daun Bakteri (Xanthomonas axonopodis pv allii)

Response Several  Varieties  of Onion Against Bacterial  Leaf Blight  Disease 

(Xanthomonas axonopodis pv allii)

Zurai Resti*, Yulmira Yanti*, dan Hairic Adi Putra**

E-mail: zures_01@yahoo.com

Abstrac

Bacterial  leaf  blight disease is an important disease in the onion crop, the disease has spread  in centra of  onion production in West Sumatra with the attack rate reached 100% in Solok. Until now there has been no onion varieties that are resistant to the disease. The Research on the response of several  varieties of onion bacterial blight disease (Xanthomonas axonopodis pv allii = Xaa) has been done in  Alahan Panjang  Solok of  West Sumatra. In this Research  used seven varieties of onion such as  Bima Brebes,  Maja Cipanas , Sembrani,  Katumi , and Yellow  derived from Balitsa Lembang  and two local varieties such as Cirebon and Singkil Medan. Seven varieties were planted in the area of endemic bacterial leaf blight (BLB) is in Alahan Panjang. Observed variables were the incidence, severity,  growth and crop yields. The results showed all onion varieties used in this study was attacked Xaa caused agent of  BLB. No onion varieties  resistant  to Xaa. Cirebon was  varieties that have the lowest  disease incidency  and severitas compered  than other varieties. Yellow varieties  was the highest  of  disease  incidancy and severity  compared to other varieties.

Key word: Bacterial leaf disease, Xanthomonas axonopodis pv allii, Onion Varieties

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