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Control of powdery mildew (Leveillula taurica) using Trichoderma asperellum and Metarhizium anisopliae in different pepper types

  • César Guigón López
  • Laila Nayzzel Muñoz Castellanos
  • Nallely Alejandra Flores Ortiz
  • Judith Adriana González González
Article
  • 36 Downloads

Abstract

This study investigated the effectiveness of Trichoderma asperellum (Samuels, Lieckf. & Nirenberg) and Metarhizium anisopliae (Metschn.) Sorokin in controlling pepper powdery mildew. Culture extracts of these fungi inhibited conidial germination in Leveillula taurica (Lév.) G. Arnaud. T. asperellum showed higher chitinolytic activity than that of M. anisopliae. The latter exhibited elevated β-1,3-glucanase activity as compared with that of T. asperellum. In a high-tunnel greenhouse, T. asperellum was more persistent than M. anisopliae. Jalapeño pepper was more vulnerable to powdery mildew than arbol pepper. In the field, the fungi did not control powdery mildew in jalapeño pepper. In arbol pepper, both fungal species reduced disease severity to a level similar to that of a chemical control. T. asperellum and M. anisopliae may be effective in the control of powdery mildew on peppers and could lead to the disuse of pesticides on some but not all types of pepper.

Keywords

Capsicum annuum Control methods Endophytic fungi Fungal antagonism 

Notes

Acknowledgements

We thank the Fundacion Produce Chihuahua A.C. for providing financial support for the project (Grant 08-2011-0040). Thanks to the SENASICA-SAGARPA for providing strain Ma70 of Metarhizium anisopliae.

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Copyright information

© International Organization for Biological Control (IOBC) 2018

Authors and Affiliations

  1. 1.Centro de Investigación en Recursos NaturalesAntigua Escuela Normal Rural de SalaicesChihuahuaMexico
  2. 2.Facultad de Ciencias QuímicasUniversidad Autónoma de ChihuahuaChihuahuaMexico

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