Post-bloom Fruit Drop, an Increasingly Prevalent Disease of Citrus in the Americas

Timmer, L. W.; Agostini, J. P.; Zitko, S. E.; Zulfiqar, Muhammed

doi:10.1094/pd-78-0329

Cited by 71 publications

(77 citation statements)

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“…Further studies are necessary preferably in younger trees with lower incidences of anthracnose to verify a possible clustering of diseased trees. According to Timmer et al (1994), mechanisms of C. acutatum J.H. Simmonds dispersal over long distances are not clear.…”

Section: Temporal Progress and Spatial Distribution Of Quiescent Disementioning

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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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: Temporal Progress and Spatial Distribution Of Quiescent Disementioning

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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“…As folhas ao redor da inflorescência doente são frequentemente pequenas, deformadas, com nervuras grossas e dão aos ramos aparência de roseta (FEICHTENBERGER et al, 2005;TIMMER, et al, 1994).…”

Section: Podridão Floral Dos Citrosunclassified

“…Os sintomas da podridão floral dos citros caracterizam-se por lesões necróticas nas pétalas, queda de frutos e formação de cálices e pedúnculos persistentes (FEICHTENBERGER et al, 2005;TIMMER, et al, 1994). A antracnose do limoeiro galego causa doença nas pétalas como descrito para PFC, no entanto, afeta também folhas jovens, brotos e frutos.…”

Section: Introductionunclassified

Infecção e colonização de Colletotrichum gloeosporioides em goiaba e infecção de Colletotrichum acutatum em folhas de citros

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“…A faixa ótima de temperatura para o crescimento in vitro de C. acutatum está entre 23 e 27°C (AGOSTINI; TIMMER; MITCHELL, 1992;PERES, 1998;FEICHTENBERGER et al, 2005), embora possa se desenvolver na faixa de 15 a 30°C (FEICHTENBERGER et al, 2005). Apesar das baixas temperaturas reduzirem o desenvolvimento da doença sob condições de campo, por outro lado, reduzem também a velocidade de desenvolvimento da florada podendo, assim, prolongar o período em que as flores estão suscetíveis às infecções (TIMMER, 1993;TIMMER et al, 1994;FEICHTENBERGER et al, 2005).…”

Section: O Ambiente E a Doençaunclassified

“…acutatum, em resposta ao tratamento com extrato floral e, estes conídios parecem ser a fonte primária de inóculo para a infecção de novos tecidos (LEANDRO et al, 2001;TIMMER et al, 1994). Figura 17 -Percentual de flores com sintomas da podridão floral dos citros nos tratamentos com plantas apenas inoculadas (Inoc.)…”

Section: Compostos Voláteisunclassified

Isolamento e identificação de substâncias provenientes da laranjeira ´Valência` (Citrus sinensis) envolvidas no estímulo e/ou quebra da dormência de estruturas quiescentes de Colletotrichum acutatum, agente causal da podridão floral dos citros

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Post-bloom Fruit Drop, an Increasingly Prevalent Disease of Citrus in the Americas

Cited by 71 publications

References 0 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

Infecção e colonização de Colletotrichum gloeosporioides em goiaba e infecção de Colletotrichum acutatum em folhas de citros

Isolamento e identificação de substâncias provenientes da laranjeira ´Valência` (Citrus sinensis) envolvidas no estímulo e/ou quebra da dormência de estruturas quiescentes de Colletotrichum acutatum, agente causal da podridão floral dos citros

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