Relationship between physiological age, ripening and susceptibility of banana to wound anthracnose

The susceptibility of bananas to crown rot disease is influenced by geographical and seasonal effects

“…Such effects of low temperatures on host resistance have also been reported for other pathosystems such as Bipolaris sorokiniana/barley, Puccinia poae-nemoralis/bluegrass and Erysiphe necator/Vitis vinifera through the possible triggering of biochemical pathways associated with disease resistance (Moyer et al, 2010). As for banana wound anthracnose (Chillet et al, 2007), it was hypothesized that in such low-temperature conditions, assimilates are produced in excess as indicated by the bigger grade observed in Ekona at harvest. It has been shown, in the case of leaf rust resistance in wheat, that the setting up of the defence mechanism (phenylpropanoid pathway) represents an important energetic demand, and that several metabolic pathways that contribute to increased carbon flux through the tricarboxylic cycle are triggered concomitantly to the genes involved in phenylpropanoid metabolism (Bolton et al, 2008).…”

“…Bananas grown in both low-altitude plantations (Dia-dia and Koumba) were more susceptible to crown rot than those grown in the high altitude plantation (Ekona). Similarly, bananas grown in highland plantations in Guadeloupe were found to be less susceptible to wound anthracnose (Chillet et al, 2006(Chillet et al, , 2007. Because of low temperatures, fruits grown in high altitudes take more time to reach 900 dd than fruits grown in low altitudes.…”

“…Both components depend on pre-harvest factors including agronomic practices and soil-climate factors (Chillet & de Lapeyre de Bellaire, 1996;Chillet et al, 2000;Lassois et al, 2010b). Alternative control methods as well as any control measures should rely on a better understanding of these pre-harvest factors as previously shown for wound anthracnose, another post-harvest disease of bananas (de Lapeyre de Chillet et al, 2006Chillet et al, , 2007. However, little is known about pre-harvest factors which influence the post-harvest development of crown rot disease.…”

Hand position on the bunch and source–sink ratio influence the banana fruit susceptibility to crown rot disease

“…Geographic and seasonal variations have been noted in the incidence of banana postharvest diseases (Lukezic et al, 1967;Shillingford, 1978;Chillet & de Lapeyre de Bellaire, 1996;Krauss & Johanson, 2000;Chillet et al, 2007;Lassois et al, 2008). It has been suggested that these spatiotemporal fluctuations may reflect variations in the banana fruit quality potential that develops in the field and which determines the postharvest onset or absence of diseases (Chillet & de Lapeyre de Bellaire, 1996;Lassois et al, submitted).…”

Agronomic characterization and resistance of banana genotypes to Colletotrichum musae

“…This is because anthracnose fungus caused by Colletotrichum musae interferes mainly in the marketing of fruits. The physiological age is what determines susceptibility to anthracnose according to Chillet et al (2007), who observed that the diameter of the necrotic area in banana was greater in those with higher physiological age. For the bioassay in vivo of the post-harvest fungus C. musae, the largest slopes of the regression were for Fhia 01, Prata and Maçã (0.331, 0.348 and 0.533) indicating high sensitivity to Colletotrichum musae being significant at 5% probability.…”