Biomatriconditioning or biopriming with biofungicides or biological agents applied on hot pepper (Capsicum annuum L.) seeds reduced seedborne Colletotrichum capsici and increased seed quality and yield
Matriconditioning, controlled seed hydration by moistened carriers with high water adsorptive matric forces, has been proven to improve seed viability and vigor, plant growth and yield of various crops. Bioprotectants and/or chemical pesticides can be used in combination with matriconditioning, the process being biomatriconditioning. Biomatriconditioning with the biofungicide clove oil 0.06% or 0.1% were effective seed treatments to improve the vigor and relative speed of germination while reducing percent of Colletotrichum capsici, a seedborne pathogen causing anthracnose disease in hot pepper seeds. Biomatriconditioning with clove leaf powder was better than matriconditioning plus fungicide in reducing infection level of C. capsici-infected hot pepper seeds, and improving seed viability and vigor for up to 24 weeks storage at ambient temperatures. In an experiment using bio-agents, the most effective seed treatment in reducing C. capsici contamination was biomatriconditioning with Trichoderma harzianum (83.7% reduction) followed by biomatriconditioning with T. pseudokoningii (82.3%), Bacillus sp. (79.8%), Gliocladium sp. (79.7%), and Pseudomonas fluorescens (78.3%). However, biopriming was better than biomatriconditioning in improving germination percentage and vigor index. In the field, biopriming with a mixture of Bacillus polymixa BG25 or P. fluorescens PG01 reduced anthracnose disease incidence from 81% in untreated infected seeds down to 9%, and improved plant growth, fruit yield, and seed quality of harvested seeds.
Ilyas, S., Asie, K.V. and Sutariati, G.A.K. 2015. Biomatriconditioning or biopriming with biofungicides or biological agents applied on hot pepper (Capsicum annuum L.) seeds reduced seedborne Colletotrichum capsici and increased seed quality and yield. Acta Hort. (ISHS) 1105:89-96
anthracnose disease, bio-agent, biocontrol seed treatment, clove oil/powder, matriconditioning, rhizobacteria, seed vigor