Incidência e severidade da malformação floral em seis cultivares de mangueira

Abstract

O presente estudo foi desenvolvido com o objetivo de avaliar a incidência e a severidade da malformação floral em diferentes cultivares de mangueira (Mangifera indica L.), em condições de clima semi-árido, no município de Santa Maria da Vitória, Estado da Bahia. O experimento foi conduzido no mês de julho de 2001, em um cultivo comercial formado por diversas cultivares divididas em talhões. Os tratamentos foram compostos por seis cultivares assim distribuídas: T1- Rosa; T2- Haden; T3- Bourbon; T4- Palmer; T5- Tommy Atkins; T6-Van Dyke. Nas condições em que o trabalho foi desenvolvido, os menores índices de incidência e severidade da malformação floral foram obtidos pela cultivar Rosa que não apresentou sintomas, seguida pela 'Bourbon'. A cultivar Haden apresentou os maiores índices da doença.

Mango malformation: etiology, symptoms, distribution and cultivar susceptibility in the Dominican Republic

“…"Puntica" and "Banilejo" were highly susceptible; "Keitt", "Palmer", and "Haden" were susceptible; and "Tommy Atkins" was tolerant when inoculated simultaneously with F. pseudocircinatum and F. decemcellulare. Previous studies documented the higher susceptibility of "Haden" to F. subglutinans, with 79.47% severity, compared with "Palmer" and "Tommy Atkins" (21.15% and 16.49%) in the field under semiarid climate conditions in Brazil (Dias et al 2003). Additionally, Zaccaro et al (2007) found that "Tommy Atkins" and "Keitt" showed high susceptibility (30%), whereas "Palmer", "Parvin", "Sensation", "Surpresa", "Van Dyke", and "Zill" presented low susceptibility (10%) 11 months after inoculation with F. subglutinans.…”

“…However, these regions represent the greatest risk (3.24%-87.5%) for disease increasing becoming a major focus of dispersal toward neighboring areas that also have arid, semiarid, or dry subhumid climates (Figs. 1B and 1C), as well as orchards with marginal technology, highly inductive conditions to the disease (Ploetz 2001;Dias et al 2003). Therefore, it is urgent to prevent the extensive dispersal of malformation or mitigate its presence and severity with prophylactic measures using an integrated mango management (IMM) strategy in the Dominican Republic (Noriega-Cantu et al 1999).…”

“…The partially contrasting results obtained for "Haden" and "Tommy Atkins" show that the cultivar tolerance of mango to Fusarium spp. should be studied considering possible parasitic interactions (combination of pathogens) and their relation to climate, among other factors, as suggested by Dias et al (2003).…”

“…The MMD incidence can be up to 20% in nursery plants (Soto-Plancarte et al 2015) and 54%-80% in adult trees (Jose et al 2000;Haggag 2010). The disease severity is highly variable and is dependent on factors such as tree phenology, genotypes, and plant age (Zaccaro et al 2007;Garcia-Lopez et al 2016), as well as arid and semiarid climatic conditions, which favor MMD (Ploetz 2001;Dias et al 2003). In highly inductive areas, MMD can reduce fruit production by up to 50% in commercial orchards (Noriega-Cantu et al 1999).…”