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Istituto Agronomico Mediterraneo di Bari (IAMB) 2021

Tetranychus urticae in organic strawberry cultivation in Morocco

Essadki, Wail

Titre : Tetranychus urticae in organic strawberry cultivation in Morocco

Auteur : Essadki, Wail

Etablissement de soutenance : Istituto Agronomico Mediterraneo di Bari (IAMB) - Centre international de hautes études agronomiques méditerranéennes (CIHEAM)

Grade : Master of science : Mediterranean organic agriculture 2021

The fungus Botrytis cinerea, the causal agent of grey mold, and the mite Tetranychus urticae are the most important disease and pest of strawberry in Morocco. This study tested the efficacy of commercial bio-fungicides (Polyversum, Prev-Am Plus, Ovalis Rhizofertil, Fungisei, granulated Silica and Amylo-X) against Botrytis cinerea and bio-acaricides (Prev-Am Plus, Nettle manure), as well as predator (Phytoseiulus persimilis), against Tetranychus urticae. A field experiment was carried out to test a few management strategies on strawberry against Botrytis cinerea (cv. Fortuna) and against Tetranychus urticae (cv. Sabrina). Both cultivars were managed under organic system in Morocco. The objectives of the investigation were to determine the effect of the preparations against grey mold and red mites on strawberry yield, on the control of the disease and pest and on products persistency. Treatments did not show any positive effect on the yield, except for granulated silica . Treatments with Bacillus subtilis significantly reduced disease incidence with respect to control and showed to be a persistent product. The first-year experiment validated the efficacy of Bacillus subtilis under laboratory conditions. Moreover, treatments with all products against Tetranychus urticae significantly reduced infestation compared with control. In particular, treatment with Phytoseiulus persimilis was the most effective.

Présentation (IAMB Library)

Page publiée le 31 mars 2022