118 research outputs found

    Citrus postharvest diseases and injuries related to impact on packing lines

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    A exporta√ß√£o de frutos c√≠tricos frescos representa menos que 1% da produ√ß√£o brasileira. Dentre os fatores atribu√≠dos a esta baixa rela√ß√£o entre exporta√ß√£o e produ√ß√£o destacam-se as barreiras sanit√°rias e o aspecto visual de qualidade inferior. Este trabalho objetivou caracterizar os danos p√≥s-colheita de frutos de laranja 'Valencia' e tangor 'Murcott', destinados √† exporta√ß√£o, ap√≥s diferentes etapas do beneficiamento em packinghouse e identificar os pontos cr√≠ticos e a magnitude de impacto em linhas de beneficiamento. Os frutos foram coletados na chegada ao packinghouse, tanto ap√≥s a pr√©-lavagem como ap√≥s o desverdecimento, na banca de embalagem e no palete; e armazenados individualmente durante 21 dias a 25¬ļC e 85% de UR. A incid√™ncia de inj√ļrias foi avaliada visualmente a cada tr√™s dias. Para a avalia√ß√£o da magnitude de impactos (G, m/s¬≤) nos 19 pontos de transfer√™ncia da linha de beneficiamento de citros empregou-se uma esfera instrumentada com registrador de acelera√ß√£o. Observou-se uma baixa incid√™ncia de podrid√Ķes nas diferentes etapas do beneficiamento dos frutos, com valores abaixo de 3,5% e levemente superior ap√≥s o desverdecimento em laranja 'Valencia' e tamb√©m redu√ß√£o de podrid√Ķes ap√≥s a aplica√ß√£o de fungicidas em tangor 'Murcott'. Os principais pat√≥genos encontrados em laranja foram Lasiodiplodia theobromae e Penicillium digitatum, sendo superados em tangor por Colletotrichum gloeosporioides. Na avalia√ß√£o dos impactos na linha de beneficiamento, 94,7% dos impactos variaram entre a faixa de 30-95 G, causados principalmente por quedas em superf√≠cies r√≠gidas. Os maiores impactos foram observados quando os frutos foram transferidos da linha de beneficiamento para bins, destinados ao desverdecimento. Os danos mec√Ęnicos de oleocelose foram crescentes at√© a banca de embalagem.Brazilian exports of fresh citrus represent less than 1% of the overall Brazilian production. Phytosanitary barriers and poor appearance stand out among the several reasons contributing to such low exporting/production ratio. The purpose of this work was to characterize postharvest injuries in 'Valencia' sweet oranges and 'Murcott' tangors produced for foreign markets after different processing stages in a packinghouse, as well as to identify critical points and impact extent on packing lines. Sampling was performed both after pre-washing and degreening the fruits, and also at the arrival on the packing table and in the pallet. They were stored for 21 days at 25¬ļC and 85% RH. The incidence of injuries was visually assessed every three days. An instrumented sphere with acceleration register was used to evaluate the extent of impacts (G, m/s¬≤) at the 19 transference points of the citrus processing line. There was low rot incidence (under 3.5%) at the different stages of fruit processing, with slight increase after degreening in 'Valencia' orange and a decrease after fungicides treatment in 'Murcott' tangor. The main pathogens found in the oranges were Lasiodiplodia theobromae and Penicillium digitatum, which were surpassed by Colletotrichum gloeosporioides in the tangors. Impacts in the processing line were caused mainly by drops on hard surfaces, with 94.7% of them varying from 30 to 95 G. The greatest impacts were observed when fruits were transferred from the processing line to bins destined to degreening. Mechanical injuries related to oleocellosis increased until the arrival of fruits at the packing table

    Doen√ßas p√≥s-colheita em citros e inj√ļrias relacionadas ao impacto em linhas de beneficiamento

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    Funda√ß√£o de Amparo √† Pesquisa do Estado de S√£o Paulo (FAPESP)Conselho Nacional de Desenvolvimento Cient√≠fico e Tecnol√≥gico (CNPq)Brazilian exports of fresh citrus represent less than 1% of the overall Brazilian production. Phytosanitary barriers and poor appearance stand out among the several reasons contributing to such low exporting/production ratio. The purpose of this work was to characterize postharvest injuries in 'Valencia' sweet oranges and 'Murcott' tangors produced for foreign markets after different processing stages in a packinghouse, as well as to identify critical points and impact extent on packing lines. Sampling was performed both after pre-washing and degreening the fruits, and also at the arrival on the packing table and in the pallet. They were stored for 21 days at 25¬ļC and 85% RH. The incidence of injuries was visually assessed every three days. An instrumented sphere with acceleration register was used to evaluate the extent of impacts (G, m/s¬≤) at the 19 transference points of the citrus processing line. There was low rot incidence (under 3.5%) at the different stages of fruit processing, with slight increase after degreening in 'Valencia' orange and a decrease after fungicides treatment in 'Murcott' tangor. The main pathogens found in the oranges were Lasiodiplodia theobromae and Penicillium digitatum, which were surpassed by Colletotrichum gloeosporioides in the tangors. Impacts in the processing line were caused mainly by drops on hard surfaces, with 94.7% of them varying from 30 to 95 G. The greatest impacts were observed when fruits were transferred from the processing line to bins destined to degreening. Mechanical injuries related to oleocellosis increased until the arrival of fruits at the packing table.A exporta√ß√£o de frutos c√≠tricos frescos representa menos que 1% da produ√ß√£o brasileira. Dentre os fatores atribu√≠dos a esta baixa rela√ß√£o entre exporta√ß√£o e produ√ß√£o destacam-se as barreiras sanit√°rias e o aspecto visual de qualidade inferior. Este trabalho objetivou caracterizar os danos p√≥s-colheita de frutos de laranja 'Valencia' e tangor 'Murcott', destinados √† exporta√ß√£o, ap√≥s diferentes etapas do beneficiamento em packinghouse e identificar os pontos cr√≠ticos e a magnitude de impacto em linhas de beneficiamento. Os frutos foram coletados na chegada ao packinghouse, tanto ap√≥s a pr√©-lavagem como ap√≥s o desverdecimento, na banca de embalagem e no palete; e armazenados individualmente durante 21 dias a 25¬ļC e 85% de UR. A incid√™ncia de inj√ļrias foi avaliada visualmente a cada tr√™s dias. Para a avalia√ß√£o da magnitude de impactos (G, m/s¬≤) nos 19 pontos de transfer√™ncia da linha de beneficiamento de citros empregou-se uma esfera instrumentada com registrador de acelera√ß√£o. Observou-se uma baixa incid√™ncia de podrid√Ķes nas diferentes etapas do beneficiamento dos frutos, com valores abaixo de 3,5% e levemente superior ap√≥s o desverdecimento em laranja 'Valencia' e tamb√©m redu√ß√£o de podrid√Ķes ap√≥s a aplica√ß√£o de fungicidas em tangor 'Murcott'. Os principais pat√≥genos encontrados em laranja foram Lasiodiplodia theobromae e Penicillium digitatum, sendo superados em tangor por Colletotrichum gloeosporioides. Na avalia√ß√£o dos impactos na linha de beneficiamento, 94,7% dos impactos variaram entre a faixa de 30-95 G, causados principalmente por quedas em superf√≠cies r√≠gidas. Os maiores impactos foram observados quando os frutos foram transferidos da linha de beneficiamento para bins, destinados ao desverdecimento. Os danos mec√Ęnicos de oleocelose foram crescentes at√© a banca de embalagem.662210217Funda√ß√£o de Amparo √† Pesquisa do Estado de S√£o Paulo (FAPESP)Conselho Nacional de Desenvolvimento Cient√≠fico e Tecnol√≥gico (CNPq)Funda√ß√£o de Amparo √† Pesquisa do Estado de S√£o Paulo (FAPESP)Conselho Nacional de Desenvolvimento Cient√≠fico e Tecnol√≥gico (CNPq)CNPq_BrasilFAPESP_Brasi

    Doen√ßas p√≥s-colheita em citros e inj√ļrias relacionadas ao impacto em linhas de beneficiamento

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    Brazilian exports of fresh citrus represent less than 1% of the overall Brazilian production. Phytosanitary barriers and poor appearance stand out among the several reasons contributing to such low exporting/production ratio. The purpose of this work was to characterize postharvest injuries in 'Valencia' sweet oranges and 'Murcott' tangors produced for foreign markets after different processing stages in a packinghouse, as well as to identify critical points and impact extent on packing lines. Sampling was performed both after pre-washing and degreening the fruits, and also at the arrival on the packing table and in the pallet. They were stored for 21 days at 25¬ļC and 85% RH. The incidence of injuries was visually assessed every three days. An instrumented sphere with acceleration register was used to evaluate the extent of impacts (G, m/s2) at the 19 transference points of the citrus processing line. There was low rot incidence (under 3.5%) at the different stages of fruit processing, with slight increase after degreening in 'Valencia' orange and a decrease after fungicides treatment in 'Murcott' tangor. The main pathogens found in the oranges were Lasiodiplodia theobromae and Penicillium digitatum, which were surpassed by Colletotrichum gloeosporioides in the tangors. Impacts in the processing line were caused mainly by drops on hard surfaces, with 94.7% of them varying from 30 to 95 G. The greatest impacts were observed when fruits were transferred from the processing line to bins destined to degreening. Mechanical injuries related to oleocellosis increased until the arrival of fruits at the packing table662210217CONSELHO NACIONAL DE DESENVOLVIMENTO CIENT√ćFICO E TECNOL√ďGICO - CNPQFUNDA√á√ÉO DE AMPARO √Ä PESQUISA DO ESTADO DE S√ÉO PAULO - FAPESP301172/2004-8; 140966/ 2004-803/10025-9A exporta√ß√£o de frutos c√≠tricos frescos representa menos que 1% da produ√ß√£o brasileira. Dentre os fatores atribu√≠dos a esta baixa rela√ß√£o entre exporta√ß√£o e produ√ß√£o destacam-se as barreiras sanit√°rias e o aspecto visual de qualidade inferior. Este trabalho objetivou caracterizar os danos p√≥s-colheita de frutos de laranja 'Valencia' e tangor 'Murcott', destinados √† exporta√ß√£o, ap√≥s diferentes etapas do beneficiamento em packinghouse e identificar os pontos cr√≠ticos e a magnitude de impacto em linhas de beneficiamento. Os frutos foram coletados na chegada ao packinghouse, tanto ap√≥s a pr√©-lavagem como ap√≥s o desverdecimento, na banca de embalagem e no palete; e armazenados individualmente durante 21 dias a 25¬ļC e 85% de UR. A incid√™ncia de inj√ļrias foi avaliada visualmente a cada tr√™s dias. Para a avalia√ß√£o da magnitude de impactos (G, m/s2) nos 19 pontos de transfer√™ncia da linha de beneficiamento de citros empregou-se uma esfera instrumentada com registrador de acelera√ß√£o. Observou-se uma baixa incid√™ncia de podrid√Ķes nas diferentes etapas do beneficiamento dos frutos, com valores abaixo de 3,5% e levemente superior ap√≥s o desverdecimento em laranja 'Valencia' e tamb√©m redu√ß√£o de podrid√Ķes ap√≥s a aplica√ß√£o de fungicidas em tangor 'Murcott'. Os principais pat√≥genos encontrados em laranja foram Lasiodiplodia theobromae e Penicillium digitatum, sendo superados em tangor por Colletotrichum gloeosporioides. Na avalia√ß√£o dos impactos na linha de beneficiamento, 94,7% dos impactos variaram entre a faixa de 30-95 G, causados principalmente por quedas em superf√≠cies r√≠gidas. Os maiores impactos foram observados quando os frutos foram transferidos da linha de beneficiamento para bins, destinados ao desverdecimento. Os danos mec√Ęnicos de oleocelose foram crescentes at√© a banca de embalage

    Survey of cucumber target spot, in vitro sporulation and aggressiveness of Corynespora cassiicola

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    The objective was to carry out a survey of the occurrence of the target spot (Corynespora cassiicola) in cucumber crops in S√£o Paulo State; to evaluate culture media for sporulation of the pathogen and the aggressiveness of isolates of the pathogen in cucumber plants. The target spot was found in nine municipalities, being the main disease in seven of the ten municipalities sampled, with leaf incidence above 50%, showing that the target spot of cucumber is widely distributed in S√£o Paulo State. Other diseases found less frequently were scabies (Cladosporium cucumerinum), alternaria spot (Alternaria cucumerina), cercospora spot (Cercospora citrullina) and downy mildew (Pseudoperonospora cubensis), predominant in samples from one or two municipalities, but also found in most municipalities. The zoned spot (Leandria momordicae) was found to have a low incidence, in samples from three municipalities and with an incidence lower than 20%. Greater sporulation of the pathogen occurred in tomato juice and oat flour media, without scraping the surface of the colony maintained for 16 days at 25¬ļC, under continuous fluorescent light. The germination of C. cassiicola isolates used in the aggressiveness test was between 82.8 and 95.5%, with the 50 isolates separated into two groups. The isolates were separated into four groups within the range of 3.1 to 22.3% in severity, after ten days of inoculation of the pathogen, showing the genetic variability within the species, which should be considered in management studies, such as genetic improvement.The objective was to carry out a survey of the occurrence of the target spot (Corynespora cassiicola) in cucumber crops in S√£o Paulo State; to evaluate culture media for sporulation of the pathogen and the aggressiveness of isolates of the pathogen in cucumber plants. The target spot was found in nine municipalities, being the main disease in seven of the ten municipalities sampled, with leaf incidence above 50%, showing that the target spot of cucumber is widely distributed in S√£o Paulo State. Other diseases found less frequently were scabies (Cladosporium cucumerinum), alternaria spot (Alternaria cucumerina), cercospora spot (Cercospora citrullina) and downy mildew (Pseudoperonospora cubensis), predominant in samples from one or two municipalities, but also found in most municipalities. The zoned spot (Leandria momordicae) was found to have a low incidence, in samples from three municipalities and with an incidence lower than 20%. Greater sporulation of the pathogen occurred in tomato juice and oat flour media, without scraping the surface of the colony maintained for 16 days at 25¬ļC, under continuous fluorescent light. The germination of C. cassiicola isolates used in the aggressiveness test was between 82.8 and 95.5%, with the 50 isolates separated into two groups. The isolates were separated into four groups within the range of 3.1 to 22.3% in severity, after ten days of inoculation of the pathogen, showing the genetic variability within the species, which should be considered in management studies, such as genetic improvement

    Response of cucumber to target spot as a function of plant age

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    The target spot of cucurbits, caused by Corynespora cassiicola, occurs in several cultivated species, being considered an important disease on cucumbers. The objetive was to determine the cucumber response to the target leaf spot as a function of plant age, seeking a better understanding of the pathosystem in orderto avoid economic damages to producers. Cucumber ‚ÄėSoldier‚Äô plants were inoculated at 20, 30 and 40 days after sowing. Disease severity was evaluated at three, six and nine days after inoculation of the pathogen; thenumber of leaves and plant height at intervals of 7 to 10 days after inoculation of the pathogen; the number and fresh mass of fruits and the fresh and dry mass of the aerial parts of the plants at 60 days after sowing. A lower disease severity was observed on younger leaves, on plants inoculated at 20 days of age from the sixthday of evaluation, with plants inoculated at 30 days being the most susceptible, reaching 64% disease severity after nine days of inoculation. The variables plant height, number of leaves and fruits, fruit production and fresh and dry mass of the aerial part of the plant were significantly affected by the age of the plant at the timeof inoculation of the pathogen C. cassiicola, with the lowest values, in general, in the youngest inoculated plants, at 20 days, while the 40-day-old plants had the least affected vegetative development and production, evidencing the importance of delaying the entry of the disease in the area

    Microbiological and parasitological monitoring in the lettuce production chain of family farming

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    Lettuce is a vegetable consumed raw and can be a vehicle for diseases caused by microrganisms and parasites. The objective of this work was to carry out microbiological and parasitological monitoring in the production chain of lettuce, determining the main points of contamination during cultivation, harvest and handling. Microbiological analyses were performed on samples of organic compost, irrigation water, waste water from the wash tank, water that supplies the wash tank, lettuce, lanyard hands, surfaces of the wash tank and harvest box, during six production cycles. Parasite analyzes were performed on organic compost, water samples and lettuce. The irrigation water proved to be of excellent quality. The organic compost used for fertilization did not meet the microbiological limits established by current legislation and all samples presented Entamoeba spp cysts. E.coli was detected in the hand of the harvester (3rd cycle), in the harvest box (5th cycle) and in the samples of residual water from the pre-wash and water that supplies the pre-wash tank. The contamination points detected were not directly related to the contamination of the harvested lettuce. Of the lettuce samples analyzed, only 3% showed unacceptable quality according to current legislation.A alface √© um vegetal consumido cru, podendo ser um ve√≠culo de doen√ßas causadas por microrganismos e parasitas. O objetivo desse trabalho foi efetuar o monitoramento microbiol√≥gico e parasitol√≥gico na cadeia de produ√ß√£o de alface crespa, determinando os principais pontos de contamina√ß√£o durante o cultivo, colheita e manuseio. Foram realizadas an√°lises microbiol√≥gicas em amostras de composto org√Ęnico,√°gua de irriga√ß√£o, √°gua residual do tanque de lavagem, √°gua que abastece o tanque de lavagem, alfaces, m√£os do colhedor, superf√≠cies do tanque de lavagem e caixa de colheita, durante seis ciclos produtivos. An√°lises de parasitas  foram realizadas no composto org√Ęnico, amostras de √°gua e alface. A √°gua de irriga√ß√£o mostrou-se de √≥tima qualidade microbiol√≥gica e parasitol√≥gica. O composto org√Ęnico utilizado para aduba√ß√£o n√£o atendeu os limites microbiol√≥gicos estabelecidos pela legisla√ß√£o vigente e todas amostras apresentaram cistos de Entamoeba spp. Escherichia coli foi detectada  na m√£o do colhedor (3¬ļ ciclo), na caixa de colheita (5¬ļ ciclo) e nas amostras de √°gua residual da pr√©-lavagem e √°gua que abastece o tanque de pr√©-lavagem. Foi detectado Entamoeba spp em alfaces (1¬ļ e 3¬ļ ciclos). Os pontos de contamina√ß√£o detectados n√£o apresentaram rela√ß√£o direta com a contamina√ß√£o da alface colhida. Das amostras de alface analisadas apenas 3% apresentaram qualidade inaceit√°vel de acordo com a legisla√ß√£o vigente

    Defence-related components in cucumber susceptibility to target spot

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    Target spot is an important disease in cucumber culture. Due to differences in the susceptibility of cucumber cultivars to the disease, the objective was to evaluate the behavior of three cvs. in terms of leaf trichome density and biochemical variables in the interaction with the pathogen Corynespora cassiicola. The density of trichomes was evaluated on both sides of the leaves. The activity of peroxidase and polyphenol oxidase enzymes and the levels of free and bound phenolic compounds were evaluated one, three and five days after inoculation or not with the pathogen. The enzymatic activity was higher in the Safira cv., less susceptible to the disease, in relation to the Taiko and Soldier cvs. Inoculated plants showed higher peroxidase activity, showing that the response to infection was accompanied by the synthesis of this enzyme, and it increased with the days after inoculation. The levels of phenolic compounds varied according to the cvs. and as a function of time, with the highest levels in the Safira and Soldier cvs. Higher density of trichomes was found in the Safira cv., with no differences between Soldier and Taiko cvs. The adaxial side of the leaves had a greater number of trichomes than the abaxial side. No direct relationships were observed between biochemical and trichome variables and disease severity in cucumber cvs., since the Soldier cv., the most susceptible to the disease, did not differ in relation to 'Taiko' in enzymatic activities, free phenolic compounds and number of trichomes, including higher levels of bound phenolic compounds.A mancha alvo constitui importante doen√ßa na cultura do pepino. Em virtude de diferen√ßas na suscetibilidade das cultivares de pepino em rela√ß√£o a doen√ßa, objetivou-se avaliar o comportamento de tr√™s cvs. quanto a densidade de tricomas foliares e de vari√°veis bioqu√≠micas na intera√ß√£o com o pat√≥geno Corynespora cassiicola. A densidade de tricomas foi avaliado em ambas os lados das folhas. A atividade das enzimas peroxidase e polifenoloxidade e os teores dos compostos fen√≥licos livres e ligados foram avaliados ap√≥s um, tr√™s e cinco dias da inocula√ß√£o ou n√£o do pat√≥geno.  A atividade enzim√°tica foi superior na cv. Safira, menos suscet√≠vel a doen√ßa, em rela√ß√£o √†s cvs. Taiko e Soldier. As plantas inoculadas apresentaram maior atividade da peroxidase, evidenciando que a resposta √† infec√ß√£o foi acompanhada pela s√≠ntese dessa enzima, e foi crescente com os dias ap√≥s a inocula√ß√£o. Os teores de compostos fen√≥licos foram vari√°veis em fun√ß√£o das cvs. e em fun√ß√£o do tempo, com os maiores teores nas cvs. Safira e Soldier. Maior densidade de tricomas foi constatado na cultiva Safira, n√£o havendo diferen√ßas entre as cvs. Soldier e Taiko. O lado adaxial das folhas apresentou maior n√ļmero de tricomas em rela√ß√£o ao abaxial. N√£o foram observadas rela√ß√Ķes diretas das vari√°veis bioqu√≠micas e de tricomas com a severidade da doen√ßa nas cvs. de pepino, uma vez que a cv. Soldier, a mais suscet√≠vel a doen√ßa, n√£o diferiu em rela√ß√£o √† ‚ÄėTaiko‚Äô nas atividades enzim√°ticas, compostos fen√≥licos livres e n√ļmero de tricomas, apresentando, inclusive, maiores teores de compostos fen√≥licos ligados

    Characterization of organic composts produced by family farming for lettuce cultivation

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    The use of organic compost in the cultivation of lettuce by family farming can be carried out in a sustainable way with the use of residues from the property, through composting. For efficient and safe use of these residues, it is necessary to monitor the composting process and adopt good agricultural practices for the production of safe food. Therefore, the objective was to identify and quantify contaminating microorganisms and to evaluate the chemical characteristics of organic compounds and their effects on the cultivation of lettuce produced in an organic system. Six periods of lettuce cultivation were studied using the organic compost produced in the planting fertilizer and cover. The results obtained for the fresh mass and the chemical analyzes of the compost, the soil and the plant were compared in a qualitative way. The results obtained from microbiological analyzes were compared to current legislation. The composition of the material used and the handling of the composting process influenced the chemical characteristics of the organic compounds applied to the soil. Organic compounds were efficient for plant nutrition, except for boron. The presence of thermotolerant coliforms was above the maximum acceptable limit, indicating contamination of the compound. The organic compost was not properly composted in most cycles. The use of organic compounds proved to be a sustainable alternative in the production of organic lettuce on family farms, but the study indicated the need for technical training.O uso do composto org√Ęnico no cultivo da alface pela agricultura familiar pode ser realizado de maneira sustent√°vel com aproveitamento de res√≠duos da propriedade, por meio da compostagem. Para uso eficiente e seguro desses res√≠duos √© necess√°rio o monitoramento do processo de compostagem e ado√ß√£o de boas pr√°ticas agr√≠colas para produ√ß√£o de alimentos seguros.  Diante disso, objetivou-se identificar e quantificar microrganismos patog√™nicos e avaliar as caracter√≠sticas qu√≠micas dos compostos org√Ęnicos e seus efeitos no cultivo da alface produzida em sistema org√Ęnico. Foram estudados seis ciclos de cultivo de alface utilizando na aduba√ß√£o de plantio e cobertura composto org√Ęnico produzido na propriedade. Os resultados obtidos para a massa fresca e as an√°lises qu√≠micas do composto, do solo e da planta foram comparados de maneira qualitativa. Os resultados obtidos das an√°lises microbiol√≥gicas foram comparados √† legisla√ß√£o vigente. A composi√ß√£o do material utilizado e o manejo do processo de compostagem influenciaram as caracter√≠sticas qu√≠micas dos compostos org√Ęnicos aplicados ao solo. Os compostos org√Ęnicos foram eficientes para a nutri√ß√£o das plantas, exceto para o fornecimento de boro. A presen√ßa de coliformes termotolerantes esteve acima do limite m√°ximo aceit√°vel, indicando contamina√ß√£o do composto. O composto org√Ęnico n√£o foi adequadamente compostado na maioria dos ciclos. O uso dos compostos org√Ęnicos mostrou-se uma alternativa sustent√°vel na produ√ß√£o de alface org√Ęnica em propriedade com agricultura familiar, mas o estudo indicou a necessidade de capacita√ß√£o t√©cnica

    Quantification of postharvest diseases of guava accessions cultivated in organic system

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    Among the postharvest diseases that occur in guava, anthracnose, black spot and stem-end rot are the most common. The incidence and diversity of these diseases depend on the host genotype. This study aimed to identify and quantify the postharvest diseases of guava accessions cultivated in organic system. For the characterization of diseases, 30 fruits from 48 accessions were evaluated in a completely randomized design. Anthracnose and black spot were the most frequent postharvest diseases in guava. The Vermelha Redonda (Shimoda), L5P21, L3P12, EEF-3, IAC-4 -Unesp and Monte Alto -Comum 1 accessions stood out with the lowest incidence of anthracnose and black spot, while L4P13, L1P2 and Creme Arredondada (Unesp) showed the highest incidence of anthracnose, black spot and stem-end rot. The Fusicoccum sp., Phomopsis sp., Phoma sp., Dothiorella sp. and Lasiodiplodia sp. pathogens were identified as the main responsible for causing stem-end rot symptoms
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