Integrated Control of Strawberry Anthrachnose by Trichoderma Asperellum–Pyraclostrobin/Boscalid Combination

The different Trichoderma asperellum—Pyraclostrobin + Boscalid preventive treatment programs were applied before inoculation with Colletotrichum gloeosporioides, to the aerial parts of Camarosa strawberry plants. They reduced anthracnose symptoms for 80 days, The disease severity reduction percentages on leaves were ranged from 66.66 to 99.1%. The numbers of symptomatic flowers, green and red strawberries are zero to low compared to the inoculated control, the reduction percentages varied between 94.1–100%, 92.25–100% and 81.35–100%. The C. gloeosporioides inoculum on leaves and petioles of treated plants was low to nil compared to plants inoculated with the pathogen, the re-isolation percentages fluctuated from 0 to 25%/100% and 0 to 33%/100%. The combined treatments provided better development of the aerial and root parts than the inoculated plants. The aerial perpendicular diameter growth, root length development and their fresh weights reached respectively 16.66/7.66 cm, 35.33/14 cm, 8.6/3.3 g and 21.83/9.16 g. The Trichoderma asperellum—Pyraclostrobin + Boscalid combination provided integrated protection of strawberry plants against anthracnose and compatibility between biological control agent and fungicide.