Resumo

PEREIRA BAEZ, Karen Denisse  e  GRABOWSKI OCAMPOS, Cristhian Javier. Potential of steel slag in the induction of resistance to foliar disease on wheat (Triticum aestivum L.). Investig. Agrar. [online]. 2015, vol.17, n.2, pp.98-107. ISSN 2305-0683.  https://doi.org/10.18004/investig.agrar.2015.diciembre.98-107.

Foliar diseases reduce 20-30% of crop productivity. In order to find new management options,   steel slag´s resistance induction degree on wheat plants (Triticum aestivum L.) foliar disease intensity was assessed. A research, using diagrammatic scales, was carried out at the FCA-UNA Experimental Field with the aim of identifying pathogens associated to this aetiology and of  determining disease intensity (severity %). The variables evaluated were Leaf area index (LAI) chlorophyll content and yield. Treatments consisted of increasing steel slag doses with an absolute control and a chemical one. The experimental design was completely randomized with four replications. Data was subjected to analysis of variance with 5% error probability. Laboratory analysis of symptomatic plants identified the pathogens Drechslera tritici-repentis; Bipolaris sorokiniana; Septoria tritici and Puccinia triticina. Leaf area index (LAI) was measured by an AAC-100 measuring device; chlorophyll content was assessed by SPAD® portable meter and yield was expressed by kg ha^-1. Potential inducing effect was determined to be at a 500 kg ha^-1 dose given that it exhibited the lowest disease severity. No significant difference in either yield or Leaf area index were found when increasing steel slag doses. Chlorophyll concentration increased when lowering steel slag content in soil.

Palavras-chave : Triticum aestivum L.; foliar diseases; resistance induction; steel slag.

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