Study of interaction between plant nutrition (N,P,K and Ca) and verticillios wilt disease (Verticillium dahliae) in cucumber.
Cucumber wilt disease caused by verticillium dahliae is one of the most important diseases of cucumber. Disease severity can to be decreased by plant nutrition management, especially nitrogen, phosphorus, potassium and calcium levels. For this purpose, interaction between plant nutrition and cucumber verticillios disease in cucumber was studied. Different levels of N, P, K and Ca on one current cultivar of cucumber were investigated at the presence and absence of fungus, using a factorial analysis based on completely randomized design with three replications. Significant different were observed among the different levels of elements used in this study. Presence of N, P, K and Ca increased the percentage of alive plants in comparison with control (distilled water + fungus). The effects of different levels of N, P, K and Ca were also investigated on growth of V. dahliae in vitro at a complete randomized design with three replications. Variance analysis of growth area of the fungus showed significant difference among some levels of the elements. The highest area growth of fungus was occurred at 0.1 gr/l of KNO3 and was 47/26 Cm2. The factors investigated, clearly suggested the occurrence of a wide interaction between cucumber nutrition (N, P, K and Ca) and V.dahliae and showed the importance of plant nutrituin management for decrease of disease severity.
Roustaee
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Plant Protection Departement, University of Tehran, Aboureyhan Campus, Iran.
Baghdadi
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D001203:Ascomycota / Q000254:growth & development* / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D015169:Colony Count, Microbial; D018553:Cucumis sativus / Q000378:metabolism* / Q000382:microbiology*; D004305:Dose-Response Relationship, Drug; D005163:Factor Analysis, Statistical; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D010935:Plant Diseases / Q000382:microbiology*; D011188:Potassium / Q000378:metabolism; D011897:Random Allocation
D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium; D002118:Calcium