Effects of Pseudomonas chlororaphis strain AFS009 and Beauveria bassiana strain GHA against Plumeria rust in Hawaii

Abstract

PPSPlumeria (Plumeria spp.), a member of Apocynaceae family, is a perennial ornamental shrub found worldwide in tropical and subtropical climatic regions. This deciduous shrub is a popular ornamental that is grown for its beautiful foliage and fragrant flowers in parks and landscape establishments. In the states of Hawaii, Texas, Florida, and California, plumeria is a well-known landscape plant in residential and commercial settings. To date, eight species of Plumeria and Catharanthus roseus (L.) G. Don host plumeria rust (Coleosporium plumeriae Pat.) (Kakishima et al. 2017). The fungus attacks both mature and young leaves of plumeria but typically the latter are less susceptible due to high latex content. The latex demonstrated chitinase activity and is known to inhibit germination of uredinio spores (Weeraratne & Adikaram 2006). Infection is characterized by its powdery rust pustules of bright yelloworange urediniospores on the underside of leaves. The rust fungus is less likely to kill the plant or directly affect its flowers, but defoliation reduces its photosynthetic ability and aesthetic values of the ornamental.

Bioformulados para mantener la viabilidad de rizobacterias y su aplicación en Theobroma cacao L. CCN-51

“…Existen pocos reportes al empleo de formulaciones PGPR al control biológico de infecciones ocasionadas por hongos en CCN-51. La alternativa es viable en base a Waisen et al (2023); Anderson y Kim (2020) que utilizaron el producto comercial P. chlororaphis AFS009 (Howler™, AgBiome Inc., USA) para la protección en plantas contra fitopatógenos Alternaria sp., Botrytis sp., Colletotrichum sp., Fusarium sp., Phytopthora sp., Pythium sp., Rhizoctonia sp. y Sclerotinia sp.…”

“…y Sclerotinia sp. por la producción de fenazinas antimicrobianas, insecticidas y nematicidas (Waisen et al, 2023;Anderson y Kim, 2020). La producción de compuestos como el 2,4 diacetilcloroglucinol (DAPG), fenazinas, pioluteorina, cianuro de hidrógeno podrían estar ligados a la acción de biocontrol en enfermedades fúngicas (Balmes et al, 2022;Chávez Arteaga et al, 2020).…”