Detection of latent infections in mango fruit with herbicides

Paramasivan, M.; Mohan, S.; Ali, Ghanbari; Mathiyazhagan, S.; Muthukrishanan, N.

doi:10.1080/03235400601069696

Cited by 4 publications

(8 citation statements)

References 5 publications

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“…infections, as previously reported for avocados (Prusky et al, 1996). When treating mango fruit with paraquat, anthracnose symptoms were anticipated in 4-5 days, which assisted in decisions regarding storage time and whether to export or send the fruit to the domestic market in India (Paramasivan et al, 2009). …”

Section: Detection Of Latent Pathogen Infections In Immature Guavasmentioning

confidence: 61%

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Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices

Fischer

Soares-Colletti

Palharini

et al. 2017

Sci. agric. (Piracicaba, Braz.)

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Postharvest diseases are a major problem in guava crops as the symptoms normally appear during fruit ripening. This study aimed to detect and characterize the temporal dynamics and spatial patterns of the most important guava diseases in orchards with and without removal of crop residues as a sanitation practice. The experiment was conducted in an orchard of ´Pedro Sato´ guavas, over two consecutive seasons, and data were collected from the flowering to the fruit ripening stage. In immature guavas treated with paraquat and ethrel, Colletotrichum spp.was detected from the 5 th day of incubation. Anthracnose was detected in flowers at incidences higher than 50 % and black spot in fruit larger than 5.5 cm in length. The monomolecular and the exponential models provided the best fit to anthracnose and black spot incidence progress curve data, respectively. Both diseases showed a predominantly random spatial pattern in the orchard.The removal of crop residues reduced the rate of disease progress in at least one season, and was effective in reducing the areas under the quiescent disease progress curves (AUDPC) of anthracnose. Anthracnose incidence increased from 57 to 96 % and black spot from 1 to 48 %, respectively, at fruit maturation levels 1 and 3. A negative correlation was found between disease incidence and the color of the fruit skin (°h). Fruit harvested during the later maturation stages showed higher incidence of the diseases. Due to the wide distribution and early infection of quiescent diseases, starting at flowering, preventive management should consider disease monitoring and removal of crop residues.

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Section: Detection Of Latent Pathogen Infections In Immature Guavasmentioning

confidence: 61%

“…in apples (ValdebenitoSanhueza et al, 2005) and Colletotrichum sp. in mangos (Paramasivan et al, 2009) already exist. For example, immature fruits are immersed in a paraquat solution that generates free radicals which induce lipid peroxidation and loss of membrane integrity (Dodge, 1971).…”

Section: Introductionmentioning

confidence: 99%

Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices

Fischer

Soares-Colletti

Palharini

et al. 2017

Sci. agric. (Piracicaba, Braz.)

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“…), strawberry (Mertely and Legard ) or mango (Paramasivan et al . ). This herbicide is able to kill rapidly the chlorophyll‐containing tissues, but it does not affect fungal infections.…”

Section: Introductionmentioning

confidence: 97%

“…The herbicide paraquat (1,1 0 -dimethyl-4,4 0 -bipyridinium dichloride) has been used to enhance the detection of Alternaria, Botrytis, Colletotrichum, Phomopsis, and other fungal species on asymptomatic plant material such as apple (Biggs 1995), sweet cherry (Adaskaveg et al 2000), strawberry (Mertely and Legard 2004) or mango (Paramasivan et al 2009). This herbicide is able to kill rapidly the chlorophyll-containing tissues, but it does not affect fungal infections.…”

Section: Introductionmentioning

confidence: 99%

Detection of latent infections caused by Colletotrichum sp. in olive fruit

et al. 2017

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This study is relevant because we set up a viable, non-hazardous alternative to paraquat to detect latent infections of Colletotrichum sp. using NaOH. The use of NaOH is a simple and eco-friendly tool that allows the determination of the level of latent infections by Colletotrichum in olives. Therefore, our method will be useful in decision-making processes for disease management before the appearance of the first visible symptoms.

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“…There is a methodology already available to detect quiescent infection by Colletotrichum spp. in mango (PARAMASIVAN et al, 2009), papaya (SILVA, 2010) and guava (FISCHER et al, 2017), as well as by Botryosphaeria dothidea in apples (VALDEBENITO-SANHUEZA et al, 2005), which consists in treating the fruits with ethrel (ethylene precursor) or paraquat. Ethylene promotes fruit ripening, leading to biochemical and physiological changes necessary for the fungus to pass through the quiescence stage and colonize the fruit.…”

Section: Introductionmentioning

confidence: 99%

Detection and epidemiological progress of quiescent avocado diseases

et al. 2019

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One of the major problems in the commercialization of avocados is the incidence of postharvest diseases, especially anthracnose (Colletotrichum spp.) and stem-end rot (Lasiodiplodia theobromae, Fusicoccum aesculi and Neofusicoccum spp.). As there is a lack of epidemiological information on these pathosystems, the objective of this study was to establish a method to detect quiescent infections and characterize their temporal progression and spatial pattern in a commercial orchard. Detection of quiescent infections was evaluated in flowers and fruits that were immature and in commercial harvest stage, treated with paraquat, ethrel or water. Treatment of flowers and immature fruits with paraquat led to rapid detection of Colletotrichum spp. In two seasons of a ‘Hass’ avocado orchard, the incidence of diseases was evaluated from open flowers to fruit harvest, totaling 11 evaluations at biweekly intervals. When fruits reached the harvest stage, the spatial distribution of diseased fruits in the trees was evaluated by means of dispersion index and modified Taylor’s law. Considering the evaluation of temporal disease progression, anthracnose was the most important disease, presenting a high initial incidence of 60 and 86% diseased flowers in the two seasons, respectively, while fruits showed an average disease incidence of 70 and 87%, respectively. Stem-end rot was observed only in fruits since the beginning of their development and presented low incidence (<8% fruits), significantly inferior to that of anthracnose. The diseases showed random dispersion within the trees, indicating that their initial inoculum is evenly distributed in the plants.

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Detection of latent infections in mango fruit with herbicides

Cited by 4 publications

References 5 publications

Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices

Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices

Detection of latent infections caused by Colletotrichum sp. in olive fruit

Detection and epidemiological progress of quiescent avocado diseases

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