The Efficacy of Several Fungicides on the Development of Colletotrichum spp. and Strawberry Anthracnose in Morocco

Abstract

The aim of this study was to evaluate in vitro and in vivo the effect of four chemical fungicides, Cyprodinil (37,50%) + Fludioxonil (25%), Pyraclostrobin (26,70%) + Boscalid (6,70%), Mepanipyrim (50%) and Thiram (80%), against Colletotrichum acutatum and C. gloeosporioides, causal agents of anthracnose, one of the important plant diseases in Strawberry in Morocco. Mepanipyrim inhibited mycelial growth from 55.3 to 75% and Thiram from 68.33 to 91.66% and Cyprodinil + Fludioxonil from 93 to 100%. Similarly, Pyraclostrobin + Boscalid and Thiram showed strong inhibition of conidia production in the four Colletotrichum isolates tested ranging from 82.7 to 98.7% and 77 to 99.61%, respectively. Significant inhibition is also observed for Cyprodinil + Fludioxonil 53.72 to 99%. In vivo, the preventive and curative treatments on the aerial parts of Camarosa strawberry plants, with the two fungicides Switch 62.5WG and Signum WG, were shown to be effective against anthracnose, reducing the symptoms of the disease relative to the control.