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Research Article Open access CC BY 4.0

Integrated Control against Rice Blast and Leaf Spot by Trichoderma harzianum and Two Fungicides

A. Mouria, B. Mouria, A. Hmouni, A. Ouazzani Touhami, A. Douira

Annual Research & Review in Biology · pp. 1–6 · Published 11 Oct 2018

10.9734/ARRB/2018/43195

Abstract

Integrated pest management is performed at intervals of 10 days, during all the season of rice cultivation, by the application of Trichoderma harzianum at a concentration of 108 spores/ml, in alternation with the mancozeb at 1000 ppm against rice blast and rice leaf spot and the pyrazophos at 750 ppm against blast. The assessment of symptoms is performed at the beginning of the panicles appearance, by estimating the incidence of the disease and the symptoms severity. Thus, at the end of treatment programs, the alternation of pyrazophos and T. harzianum reduced blast at a rate similar to that noted when pyrazophos is used alone (i.e. respectively 90.5 and 89.1%). This percentage is better than that recorded following treatment by T. harzianum alone (78.4%). Mancozeb alternated with T. harzianum reduced blast at a rate of (83.49%) compared with the fungicide or the antagonist alone (77 and 78.4%). The application of mancozeb alone reduced the leaf spot at a rate similar to that noted following its alternation with T. harzianum (79.2 and 75.64%) and better than that obtained after treatment with T. harzianum alone (69.5%).

Rice rice blast leaf spot Trichoderma harzianum mancozeb pyrazophos integrated pest management

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Cited by 4

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Moutoshi Chakraborty, Nur Uddin Mahmud, Chhana Ullah · Critical Reviews in Biotechnology · 2021

Isolation and in-vitro assessment of antagonistic activity of Trichoderma spp. against Magnaporthe oryzae Longorola strain causing rice blast disease in Mali

Diarra Mahamadou, Kassogué Adounigna, Hamadoun Babana Amadou · African Journal of Microbiology Research · 2022

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