Efficacy of Various Trichoderma spp. in Controlling Anthracnose Disease in White Chaiburi Pepper (Capsicum frutescens)
Keywords:
Anthracnose, Colletotrichum spp., Trichoderma spp., White Chaiburi pepper (Capsicum frutescens)Abstract
Abstract
This study aimed to evaluate the efficacy of three Trichoderma strains (TSU, TSUZ2-03, and PT3.5) in controlling anthracnose disease caused by Colletotrichum spp. in White Chaiburi pepper, through laboratory. Chili fruits showing disease symptoms were collected and subjected to a pathogenicity test. Three isolates of the pathogen were obtained, designated as Chi-1, Chi-2, and Chi-3. Among them, isolate Chi-2 showed the highest disease severity (lesion width of 0.9 cm.) Results demonstrated that Trichoderma TSU exhibited the highest inhibitory activity, reduced lesion size on pepper fruits to an average of 0.33 – 0.4 cm, and achieved a 67.26% inhibition rate, while PT3.5 and TSUZ2-03 showed lower efficacy (38.56% and 13.56%, respectively). Field trials confirmed that Trichoderma TSU significantly reduced disease severity (p<0.01) compared to the control group. These findings highlight Trichoderma TSU as a promising biocontrol agent for sustainable anthracnose management in White Chaiburi pepper, offering an alternative to synthetic chemical pesticides.
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