Resumen

CRUZ, Ariel; RIVERO, Deyanira; ECHEVARRIA, Anayza  y  RODRIGUEZ, Aida Tania. Management of phytopathogenic fungi on Oryza sativa with the application of Trichoderma asperellum. cultrop [online]. 2022, vol.43, n.4  Epub 01-Dic-2022. ISSN 1819-4087.

Fungal diseases in rice crop (Oryza sativa Lin.) are considered among the main causes of low cereal yields. In this sense, numerous studies indicate that the applications of Trichoderma asperellum Samuels, Lieckfeldt & Nirenberg strains to the soil in fields destined to the cultivation of rice, are promising for the control of numerous phytopathogenic fungi. The objective of the work was to evaluate the effect of the Ta 78 strain of T. asperellum against the most important diseases of rice cultivation under field conditions. For this, the strain of T. asperellum was sprayed in a terrace system during soil preparation, and a terrace was used as a production control. The severity and incidence of the main diseases caused by fungi were evaluated at various times and the number of plants, tillers and panicles per m2 was evaluated. R. solani, Helminthosporium sp. and Cercospora sp. were the fungi that most affected rice crop. The incidence and severity of the diseases evaluated in the treatment with T. asperellum, decreased significantly with respect to the control treatment, regardless of the time of the evaluation. On the other hand, the number of tillers and spikes was significantly higher in the plot treated with biological control.

Palabras clave : biological control; severity; incidence; yield.

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