The Use of Mycoendophyte-Based Bioformulations to Control Apple Diseases: Toward an Organic Apple Production System in the Aurès (Algeria)
2022
Oussama A. Bensaci | Toufik Aliat | Rafik Berdja | Anna V. Popkova | Dmitry E. Kucher | Regina R. Gurina | Nazih Y. Rebouh
The present study aims to investigate the effectiveness of bioformulations based on endophytic fungi to control apple scab and Valsa canker disease in two orchards in the Aurès region (Algeria). In both orchards, the results showed that the treatment of senescent apple leaves by invert emulsions containing <i>Trichoderma longibrachiatum</i> and <i>Chaetomium globosum</i> harmed the ascogenesis of winter forms of <i>Venturia inaequalis</i> by reducing the number of ascospore-ejecting asci, the number of morphologically mature asci, and a considerable increase in the immature asci number. This antifungal activity was more essential in soil-incorporated leaves, showing the importance of the combination of treatments with cultural practices to efficiently control the apple scab disease. Furthermore, the disease incidence decreased by 52.63% and 50.68% in R’haouat and Bouhmama orchards, respectively. Moreover, the treatment of <i>Valsa ceratosperma</i> cankers with a biogel containing the endophytic yeast <i>Metschnikowia</i> sp. led to wound healing varying from 43.52% and 87.97% after 120 days but remained more considerable than conventional treatment with Folicur (tebuconazol). The current results open real opportunities concerning the implementation of eco-friendly and potent apple protection systems.
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