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High molecular diversity of the fungus Guignardia citricarpa and Guignardia mangiferae and new primers for the diagnosis of the citrus black spot 52
Stringari,Danyelle; Glienke,Chirlei; Christo,Daniel de; Maccheroni Jr.,Walter; Azevedo,João Lucio de.
RAPD markers were used to investigate the distribution of genetic variability among a group of Guignardia citricarpa, G. mangiferae, and Phyllosticta spinarum isolates obtained from several hosts in Brazil, Argentina, Mexico, Costa Rica, Thailand, Japan, United States and South Africa. Pathogenic isolates G. citricarpa Kiely (anamorph form P. citricarpa McAlp Van Der Aa) are the etiological agent of the Citrus Black Spot (CBS), a disease that affects several citric plants and causes substantial injuries to the appearance of their fruits, thus preventing their export. Several previous studies have demonstrated the existence of an endophytic species with high morphological similarity to the causal agent of CBS that could remain latent in the same hosts....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Guignardia; SCARS; Citrus Black Spot; Citrus; Diagnosis; RAPD.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500002
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Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices 63
Fischer,Ivan Herman; Soares-Colletti,Ana Raquel; Palharini,Maria Cecília de Arruda; Parisi,Marise Cagnin Martins; Amorim,Lilian.
ABSTRACT: 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 5th 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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Colletotrichum; Guignardia; Psidium guajava; Postharvest fruit rot.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100068
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