Anthracnose disease of strawberry and use of antagonistic microorganism for disease prevention

Abstract

Morphological character and controlling of Colletotrichumspp., a causal agent of strawberry anthracnose were studied. The anthracnose disease samples were collected from the major strawberry production areas of Chiang Mai Province. Pure cultures were isolated from leaf, flower, fruit and stolon parts, and used for the morphological study of the pathogen. Numbers of collected isolates were: 22 from Mae Jam, 44 from Mae Wang, 72 from Sa Moeng, and 19 from Chom Thong. From their morphological characters of all isolates, it could be concluded that they were C. gloeosporioides. Screening of the virulent isolates for the further studies was performed in the nursery and 5 isolates; TB01, TC023, SB024, MA006 and SB032 were showed high virulence with disease indices of 4.66, 4.33, 3.77, 3.66 and 3.21, respectively. Two biocontrol agents were tested for their disease inhibition and prevention efficacies, results revealed that the bacterium, Serratia plymuthicaAIC1 has a higher percentage in prevention of the disease than use of antagonistic fungus, Trichodrerma harzianum.