Grey Mold Resistance

Grey mold resistance refers to a plant's inherent capacity to withstand infection by Botrytis cinerea, a fungal pathogen commonly encountered in cannabis cultivation. This trait is increasingly documented in breeding programs focused on environmental resilience, particularly in humid or cool-climate growing conditions where Botrytis pressure is elevated. Resistance mechanisms vary by cultivar and may involve structural factors (dense trichome coverage, leaf architecture) or biochemical pathways that inhibit fungal colonization. Lineage records frequently report resistance clustering within certain North American and European breeding lines, though the genetic basis remains incompletely mapped. Breeders working in this category typically select parent plants showing reduced bud rot incidence under controlled high-humidity stress trials. This trait is valued for both indoor and outdoor pro

Breeders integrate grey mold resistance through multi-generational selection and cross-breeding with documented resistant cultivars, often prioritizing this trait alongside yield and cannabinoid profiles in commercial breeding programs. Phenotypic screening under high-humidity conditions is the current standard method for identifying and stabilizing resistance before lineage release.