Results 151 to 160 of about 1,776 (178)

Basidiocarp Development on Mycelial Mats of Crinipellis perniciosa

Plant Disease, 1990
Basidiocarps of C.p. developed in 4-5 wk on mycelial mats supported by sterilized pieces of witches' brooms from cacao, and mats continued to produce basidiocarps for an additional 8 wk. Multibasidiospore and single-basidiospore isolates of the fungus from T.c., Solanum spp.
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Disease Gradients of Crinipellis Perniciosa on Cocoa Seedlings

1993
Plant disease epidemics can be seen as the growth of disease in time and space. In the last three decades, the temporal aspects of disease increase and progress have been researched intensively, while spatial aspects have received somewhat less attention. Nevertheless, following the first comprehensive review of the subject by Gregory (1968), the study
T. Andebrhan, A. C. Maddison, R. Arias, L. A. Maffia   +3 more
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Pathogenic variability amongst isolates of Crinipellis perniciosa from cocoa (Theobroma cacao)

Plant Pathology, 1988
Dry witches' brooms from cocoa were imported from various areas within Bolivia, Brazil, Colombia, Ecuador, Trinidad and Venezuela. Basidiocarps of Crinipellis perniciosa were induced to form on these brooms and seedlings of different types of cocoa were inoculated with basidiospores either on
B. E. J. WHEELER, R. MEPSTED
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Modes of Penetration of Young Cocoa Leaves by Crinipellis perniciosa

Plant Disease, 1989
Young attached and detached leaves of the cocoa cultivar ICS 43 were inoculated with basidiospores of Crinipellis perniciosa to investigate the modes of entry of the pathogen. Light and scanning electron microscopy after 6, 12, and 48 hr of incubation showed that the pathogen enters the leaf by direct penetration and also through stomata. In both modes
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Nuclear and mitochondrial rDNA variability in Crinipellis perniciosa from different geographic origins and hosts

Mycological Research, 2003
Genetic variability in Crinipellis perniciosa, the causal organism of witches' broom disease in Theobroma cacao, was determined in strains originating from T. cacao and other susceptible host species Heteropterys acutifolia and Solanum lycocarpum in Brazil, in order to clarify host specificity and geographical variability.
Maricília C C, de Arruda, Marisa A S V, Ferreira, Robert N G, Miller, Mário Lúcio V, Resende, Maria Sueli S, Felipe   +4 more
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Variability of populations of the witches' broom disease of cocoa (Crinipellis perniciosa)

Transactions of the British Mycological Society, 1987
In a study of variation in the causal agent of witches' broom disease (Crinipellis perniciosa) in S. America, two distinct populations of the fungus were found. Basidiocarps formed on infected cocoa ( Theobroma cacao) differed from those found on non-Theobroma material such as the dead stems of the liana Entada gigas.
J.N. Hedger, V. Pickering, J. Aragundi
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Witches' broom disease of cocoa Crinipellis perniciosa) in Ecuador

Annals of Applied Biology, 1978
SUMMARYTwo pathotypes of Crinipellis perniciosa were found in both eastern and western Ecuador. The cocoa strain was highly pathogenic to species of the genera Theobrotna and Herrania and caused the witches' broom disease. The liana strain was weakly or non‐pathogenic to cocoa and its allies; it is endemic in the forests of Ecuador on lianes, shrubs ...
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Effects of a range of procyanidins on the cocoa pathogen Crinipellis perniciosa

Physiological and Molecular Plant Pathology, 1992
Abstract Basidiospore germination and germ-tube elongation in Crinipellis perniciosa, a fungal pathogen of cocoa, were inhibited by a range of procyanidins (condensed tannins) and monomeric flavan-3-ols. Dose/response studies revealed a strong trend of increasing anti-fungal potency with increasing molecular weight of the procyanidins tested. The non-
Helen E. Brownlee, John Hedger, Ian M. Scott   +2 more
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Mapping QTLs for Witches' Broom (Crinipellis Perniciosa) Resistance in Cacao (Theobroma Cacao L.)

Euphytica, 2006
Molecular markers (RAPD, AFLP and microsatellites) were used to generate a linkage map and to identify QTLs associated to witches' broom (Crinipellis perniciosa) resistance in cacao (Theobroma cacao), using 82 individuals of an F2 population derived from the clones ICS-1 (susceptible) and Scavina-6 (resistant).
Fábio Gelape Faleiro, Vagner Tibaldi Queiroz, Uilson Vanderlei Lopes, Cláudia Teixeira Guimarães, José Luis Pires, Milton Macoto Yamada, Ioná Santos Araújo, Messias Gonzaga Pereira, Raymond Schnell, Gonçalo Apolinário de Souza Filho, Cláudia Fortes Ferreira, Everaldo Gonçalves Barros, Maurílio Alves Moreira   +12 more
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Production of basidiocarps of the cocoa pathogen Crinipellis perniciosa in in vitro culture

Transactions of the British Mycological Society, 1987
Dikaryotic cultures (C-type) of Crinipellis perniciosa, the causal agent of Witches' Broom disease of cocoa ( Theobroma cacao L.) formed fertile basidiocarps within 7 weeks of inoculation onto sterilized witches' brooms prepared in flask cultures. A similar system was also used to induce sporulation of C.
V. Pickering, J.N. Hedger
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