Abstract
The success of disease control is largely determined by the validity of information about the type of causal-pathogen. Fusarium oxysporum f. sp. cepae (FOC) was reported to attack shallots and cause leaf twisting disease in Indonesia. We have conducted researches to investigate the causal agent of Fusarium disease and carried out growth tests on nine genotypes of shallots to determine the disease severity and disease indexes, and the correlation between diseases several agronomic traits. Thirty-five strains of Fusarium spp were isolated from wilted shallots tree and bulbs. Based on morphological characterization and rapid test to the isolates, they were identified as F oxysporum, F verticillioides, F solani and F proliferatum. The shallot genotypes that showed a tolerant response to FOC isolates tested were only Sumenep variety. Mentes, Tajuk, Batu Ijo, and Bima Brebes varieties show susceptible response.
Highlights
The main obstacle in shallot production is the disease attack, one of which is tuber basal-rot disease caused by FOC [1, 2]
As the increase of the importance of the disease in the field, the study of response genotype of shallot to pathogenic FOC infection becomes important and very relevant to carry out in order to validate or confirm the information of the existence of resistance or tolerant cultivar or a variety of shallots [5].This research is aimed to determine the disease incidence, disease severity, and criteria of resistance to shallots in Indonesia by trying to develop our methods which are compiled based on various reference methods of determining disease scoring developed by other researchers
Observation of the phenotypic response was carried out on all plants of each variety. This observation aimed to describe the symptoms of the disease in more detail, and based on the observation, we have developed the disease index in order to provide a reference to research practitioners engaged in the cultivation and breeding of shallots, in terms of observing Fusarium disease in the commodity
Summary
The main obstacle in shallot production is the disease attack, one of which is tuber basal-rot disease caused by FOC [1, 2]. The disease can decrease tuber production both in field and in storage warehouse. FOC is reported to cause wilt and basal rot disease in Allium crops such as onions (Allium cepa), garlic (Allium sativum) and red onions Variation of marks of the disease caused by FOC turned out to be diverse. The fungus is reported to cause leaf twisting disease in onion, as well as on shallots plantations in several locations in Indonesia [2]. FOC causes rot at the base of the tuber, as well as on garlic bulbs [3]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
