Control of Black Spot Disease / Fruitlet Core Rot in Queen Pineapple With Integrated Mealybug, Pineapple Fruit Mite and Fungus Control Programmes

Petty, G. J.; Tustin, H.A.; Dicks, H. M.

doi:10.17660/actahortic.2006.702.17

Cited by 13 publications

(8 citation statements)

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“…subglutinans, Fusarium subglutinans) appeared in Brazil in the 1960s and became the major concern for producers in that region [9][10][11][12][13]. The name "Fusarium guttiforme" brought about confusion, and some articles dealing with FCR used it to describe the pathogen [14,15]. More recently, molecular tools led to the identification of F. ananatum as responsible for FCR and to differentiate it from F. guttiforme, the agent responsible for pineapple fusariosis [16].…”

Section: Introductionmentioning

confidence: 99%

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Diversity and Toxigenicity of Fungi that Cause Pineapple Fruitlet Core Rot

Barral

Chillet

Doizy

et al. 2020

Toxins

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The identity of the fungi responsible for fruitlet core rot (FCR) disease in pineapple has been the subject of investigation for some time. This study describes the diversity and toxigenic potential of fungal species causing FCR in La Reunion, an island in the Indian Ocean. One-hundred-and-fifty fungal isolates were obtained from infected and healthy fruitlets on Reunion Island and exclusively correspond to two genera of fungi: Fusarium and Talaromyces. The genus Fusarium made up 79% of the isolates, including 108 F. ananatum, 10 F. oxysporum, and one F. proliferatum. The genus Talaromyces accounted for 21% of the isolated fungi, which were all Talaromyces stollii. As the isolated fungal strains are potentially mycotoxigenic, identification and quantification of mycotoxins were carried out on naturally or artificially infected diseased fruits and under in vitro cultures of potential toxigenic isolates. Fumonisins B1 and B2 (FB1-FB2) and beauvericin (BEA) were found in infected fruitlets of pineapple and in the culture media of Fusarium species. Regarding the induction of mycotoxin in vitro, F. proliferatum produced 182 mg kg⁻1 of FB1 and F. oxysporum produced 192 mg kg⁻1 of BEA. These results provide a better understanding of the causal agents of FCR and their potential risk to pineapple consumers.

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Section: Introductionmentioning

confidence: 99%

“…In South Africa, Talaromyces was isolated in all parts of the fruit, while Fusarium was found only in deep lesions. Talaromyces funiculosus was considered the primary causal agent of FCR but later the situation reversed, with a majority of Fusarium observed in pineapples [14,15].…”

Section: Introductionmentioning

confidence: 99%

Diversity and Toxigenicity of Fungi that Cause Pineapple Fruitlet Core Rot

Barral

Chillet

Doizy

et al. 2020

Toxins

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“…Fusarium moniliforme) associated with Penicillium funiculosum [5][6][7]. However, the evolution of molecular tools led to the identification of Fusarium ananatum and Talaromyces funiculosus as causal agents of FCR in China, South Africa, Mauritius, and Reunion Island [4,[8][9][10][11]. Contamination by soil-borne pathogens (such as P. funiculosum) occurs at pre-flowering stages, and the fungus remains latent in a blossom cup.…”

Section: Introductionmentioning

confidence: 99%

Pineapple Mycobiome Related to Fruitlet Core Rot Occurrence and the Influence of Fungal Species Dispersion Patterns

Vignassa

Meile

Chiroleu

et al. 2021

JoF

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Fruitlet Core Rot (FCR) is a fungal disease that negatively impacts the quality of pineapple, in particular the ‘Queen Victoria’ cultivar. The main FCR causal agent has been identified as Fusariumananatum. This study focused on the correlation between FCR disease occurrence, fungal diversity, and environmental factors. FCR incidence and fungal species repartition patterns were spatially contextualized with specific surrounding parameters of the experimental plots. The mycobiome composition of healthy and diseased fruitlets was compared in order to search for potential fungal markers. A total of 240 pineapple fruits were sampled, and 344 fungal isolates were identified as belonging to 49 species among 17 genera. FCR symptom distribution revealed a significant gradient that correlated to that of the most abundant fungal species. The association of wind direction and the position of proximal cultivated crops sharing pathogens constituted an elevated risk of FCR incidence. Five highly represented species were assayed by Koch’s postulates, and their pathogenicity was confirmed. These novel pathogens belonging to Fusariumfujikuroi and Talaromycespurpureogenus species complexes were identified, unravelling the complexity of the FCR pathosystem and the difficulty of apprehending the pathogenesis over the last several decades. This study revealed that FCR is an airborne disease characterized by a multi-partite pathosystem.

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“…The economic consequences led pineapple growers and researchers to investigate means of FCR control. Petty et al (2005) sprayed a combination of two fungicides at flower induction and observed a significant reduction in the total number of black spots per fruit. Another program, aimed at controlling a vector mite, had the opposite effect to that expected: application of the miticide showed to increase the incidence of black spots (Manicom et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

An Imaging Approach to Identify Mechanisms of Resistance to Pineapple Fruitlet Core Rot

et al. 2019

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Fruitlet core rot is one of the major postharvest disease of pineapple (Ananas comosus var. comosus). In the past, control strategies were designed to eliminate symptoms without addressing their causes or mechanisms, thus achieving only moderate success. In this study, (i) we focused on the anatomy of the fruitlets in the resistant “MD-2” and susceptible “Queen” pineapple cultivars; (ii) we identified the key role of the carpel margin in the infection process; (iii) we identified the key role of the sinuous layer of thick-walled cells in the inhibition of Fusarium ananatum colonization; and (iv) we linked the anatomy of the fruitlets with the phenolic content of cell walls. The fruitlet anatomy of the two cultivars was studied using X-ray, fluorescence, and multiphoton microscopy. Sepals and bracts were not perfectly fused with each other, allowing the pathogen to penetrate the fruit even after flowering. In fact, the fungi were found in the blossom cups of both cultivars but only became pathogenic in the flesh of the “Queen” pineapple fruit under natural conditions. The outer layer of the “MD-2” cavity was continuous with thick cell walls composed of ferulic and coumaric acids. The cell walls of the “Queen” blossom cup were less lignified at the extremities, and the outer layer was interspersed with cracks. The carpel margins were fused broadly in the “MD-2” pineapple, in contrast to the “Queen” pineapple. This blemish allows the fungus to penetrate deeper into the susceptible cultivar. In pineapple fruitlets, the hyphae of F. ananatum mainly progressed directly between cell walls into the parenchyma but never reached the vascular region. A layer of thick-walled cells, in the case of the resistant cultivar, stopped the colonization, which were probably the infralocular septal nectaries. Anatomical and histochemical observations coupled with spectral analysis of the hypodermis suggested the role of lignin deposition in the resistance to F. ananatum. The major phenolics bound to the cell walls were coumaric and ferulic acids and were found in higher amounts in the resistant cultivar postinoculation. The combination of fruitlet anatomy and lignification plays a role in the mechanism of host resistance to fruitlet core rot.

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Control of Black Spot Disease / Fruitlet Core Rot in Queen Pineapple With Integrated Mealybug, Pineapple Fruit Mite and Fungus Control Programmes

Cited by 13 publications

References 0 publications

Diversity and Toxigenicity of Fungi that Cause Pineapple Fruitlet Core Rot

Diversity and Toxigenicity of Fungi that Cause Pineapple Fruitlet Core Rot

Pineapple Mycobiome Related to Fruitlet Core Rot Occurrence and the Influence of Fungal Species Dispersion Patterns

An Imaging Approach to Identify Mechanisms of Resistance to Pineapple Fruitlet Core Rot

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