Infection and Some Aspects of Resistance Mechanism of Capsicum Annuum to Ralstonia Solanacearum

TL;DRAbstract

Bacterial wilt of chilli (Capsicum annuum L.) caused by Ralstonia solanacearum is a major constraint to the production of the crop in Malaysia. To-date very few resistant germplasm of chilli to the pathogen is known. Information on the mechanism of infection and resistance, and multiplication of the pathogen in chilli are lacking. There is also no information on the anatomical characters of the hosts which might be related to resistance. The present study was, therefore, undertaken to obtain this information which would provide an understanding of the disease. It could be useful in formulating wilt-resistance breeding programme in chilli and an effective control measures for the disease. Greenhouse evaluation of the susceptibility of accessions/cultivars of Capsicum spp. to R. solanacearum revealed that the cultivar 'Kulai' was highly resistant. Three accessions were moderately resistant while all others were susceptible to highly susceptible. Anatomical study of resistan

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