Pires, J.L., Monteiro, W.R., Pinto, L.R.M. & Luz, E.D.M.N. 1996
Resistance to Witches Broom - Evaluation of genotypes from different origins. In: Proceedings of the 12th International Cocoa Research Conference, Salvador, Brasil 1996 Cocoa Producers' Alliance (in press).
Notes
Brazil - CEPEC, Itabuna, Bahia Datafiles: DIS_PHDS - Disease reaction to Witches' Broom PROGENY_ Experimental Conditions: Numbers of vegetative and cushion brooms, and healthy and WB attacked pods were recorded from each plant of the CEPEC collection between may 1995 and June 1996. (Only the accessions planted before 1990 were included in the study - 544 cloned and 21 seminal accessions). Each genotype was represented by a single row of 10 plants. To assess differences between genotypes, a mean of each genotype in the series was used as a series replication. All series with four or more representatives were considered. The analyses were based on the individual values of every single plant of each clone in a row of ten. A second collection (of approx. 250 accessions in common) were equally evaluated. Brooms were removed in December 1994, August 1995, March 1996 and a correlation analysis was carried out. Disease - Crinipellis perniciosa (Marasmius perniciosa) (local names: Witches' Broom Disease, Escoba de bruja, Balai de sorciere, Vassoura de bruxa).
Disease