Epidemiology of the Diseases of Wheat under Different Strategies of Supplementary Irrigation

Marano, Roberto P.; Maumary, Roxana L.; Fernandez, Laura N.; Rista, Luis M.

Epidemiology of the Diseases of Wheat under Different Strategies of Supplementary Irrigation

2012

Marano, Roberto P.(Department of Environmental Science, National University of Litoral) | Maumary, Roxana L.(Department of Vegetal Production, National University of Litoral) | Fernandez, Laura N.(Department of Vegetal Production, National University of Litoral) | Rista, Luis M.(Department of Vegetal Production, National University of Litoral)

Wheat (Triticum aestivum L.) is one of the most important and highly productive crops grown under supplementary irrigation in the central region of Santa Fe. However, its production is limited by the presence of diseases in the main stages for yield definition. The objective of this work was to assess wheat health in response to different supplementary irrigation strategies under greenhouse and field conditions. The field experiment included three treatments: dry (D), controlled deficit irrigation (CDI), and total irrigation (TI) using the central pivot method. Disease incidence from stem elongation and severity in flag leaf and the leaf below the flag leaf were measured. Leaf area index (LAI), harvest index, air biomass, and yield components were determined. In greenhouse the treatments were TI and CDI, with evaluations similar to the field. The major leaf diseases observed were tan spot, leaf rust, and septoria leaf blotch. Significant differences in disease burden, LAI and yield components were observed in the different treatments. Under greenhouse conditions, only tan spot was observed. The results of this study indicated that the application of supplemental irrigation in wheat improved the yield, without increasing the incidence and severity of foliar diseases.

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