Incidence of postharvest diseases on 'Kumagai' and 'Pedro Sato' guavas at wholesale markets in Brazil

Soares-Colletti, Ana Raquel; Fischer, Ivan Herman; Lourenço, Silvia de Afonseca

doi:10.1590/s1982-56762014000600010

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…The guava fruit is normally harvested by handpicking with no sorting or grading, resulting in heavy economic losses (Kamsiati, 2016). The fruit is also attacked by numerous diseases that cause rotting (Soares-Colletti et al, 2015) which reduces its marketability and processing.…”

Section: Introductionmentioning

confidence: 99%

Harvesting, postharvest handling, hygiene knowledge and practices of guava fruit farmers: A comparative study of two counties of Kenya

Katumbi¹,

Imungi²,

Abong³

et al. 2021

Afr. J. Food Sci.

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The guava (Psidium guajava) grows on farms or in the bush in many parts of Kenya, including Kitui and Taita Taveta, and remains virtually unattended. Guava fruit value chain is commercially disorganized and standard postharvest handling and storage procedures are not practiced as there is no bulk handling. This study evaluated the harvesting and postharvest handling practices of the guava fruit in two counties of Kenya. A total of 417 farmers were selected from the two counties (Kitui, n=214 and Taita Taveta, n=203). Using a structured questionnaire, data was collected utilizing Open Data Kit (ODK). Results showed that the main indicative maturity indices in Kitui and Taita Taveta were skin color (98.59 and 92.12%) and full ripe (38.79 and 18.72%) respectively. Results indicated that no packaging was done at farm level as only small quantities were harvested. Storage period was short (< 4 days) mainly to await consumption as reported by 41.6 and 55.2% handlers in Kitui and Taita Taveta, respectively. A cluster analysis of hygiene and postharvest handling practices indicated that Kitui farmers were more knowledgeable (71.9%) as compared to Taita Taveta (49.8%). Additionally, female farmers were more knowledgeable (65.4%) on postharvest handling than males (55.4%). Postharvest handling practices were informal with little packaging, poor hygiene practices, short term storage and informal marketing of small quantities in both Counties.

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Section: Introductionmentioning

confidence: 99%

Harvesting, postharvest handling, hygiene knowledge and practices of guava fruit farmers: A comparative study of two counties of Kenya

Katumbi¹,

Imungi²,

Abong³

et al. 2021

Afr. J. Food Sci.

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“…(Martins et al, 2007;Fischer et al, 2011, Fischer et al, 2012. A incidência média de pinta preta e de antracnose atingiu valores superiores a 30% em goiabas comercializadas na Companhia de Entrepostos e Armazéns Gerais de São Paulo (CEAGESP) e armazenadas por dez dias a 25°C (Soares-Colletti et al, 2014).…”

Section: Introductionunclassified

Incidência de pinta preta e características físico-químicas de goiabas submetidas a tratamentos pós-colheita

Fischer¹,

Palharini²,

Santos

et al. 2016

Com. Sci.

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The guava fruit is very as high perishable due to its intense metabolism and the occurrence of postharvest diseases. Due to the lack conservation technologies for this fruit, this study aimed to evaluate the effect of alternative products [potassium phosphite, calcium chloride, cassava starch edible coat, 1-methylcyclopropene (1-MCP), ethanol followed by dichloro s. triazinatriona sodium (ethanol+chlorine)] and hot water treatments, singly or in combination, in black spot control and the physic-chemical characteristics of ‘Pedro Sato’ guavas. The treatments were evaluated in naturally infected guavas at three maturity stages and stored at 22-25ºC and 80-85% RH for 8 days. The treatment association of ethanol+chlorine and cassava starch reduced the incidence of black spot in three maturity stages of guavas, allowing the increase of fruit’s shelf life, with a delay of two to four days in the onset of black spot symptoms. The maintenance of the physical and chemical quality characteristics of guavas with association of treatments were evidenced by the delay in skin color change, and a smaller decrease in firmness. Correlation occurred between the black spot incidence and the skin color parameter, ie, fruits harvested at later maturity stages presented higher incidence of the disease. The greater efficiency of ethanol+chlorine/starch association in the control of black spot was directly related to the ripening delay in fruits, evidenced by the skin color and firmness attributes.

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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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Incidence of postharvest diseases on 'Kumagai' and 'Pedro Sato' guavas at wholesale markets in Brazil

Cited by 4 publications

References 12 publications

Harvesting, postharvest handling, hygiene knowledge and practices of guava fruit farmers: A comparative study of two counties of Kenya

Harvesting, postharvest handling, hygiene knowledge and practices of guava fruit farmers: A comparative study of two counties of Kenya

Incidência de pinta preta e características físico-químicas de goiabas submetidas a tratamentos pós-colheita

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

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