Shripat, C. 1995
Preliminary screening of Trinidad Selected Hybrid (TSH) clones for resistance to Black Pod disease caused by Phytophthora palmivora (Butl.) in Trinidad. In: Proceedings of the 11th International Cocoa Research Conference, Yammoussoukro, Côte d'Ivoire, 1993. Cocoa Producers' Allliance, Lagos, Nigeria. pp. 837-840.
Notes
Trinidad - Central Experiment Station, Centeno Datafile: DIS_PHDS - Disease reaction to Phytophthora Experimental Conditions: A field investigation of the reaction to Phytophthora palmivora of 181 TSH clones. Unripe, mature attached pods were inoculated using a modified version of the method published by Sreenivasan (1975). Two infected grains of wheat were placed in a 3 cm long section of a drinking straw attached to the pod surface with plasticine. The straw was then filled with sterile distilled water. If disease symptoms were observed on control pods of IMC 67, 3-5 days after inoculation, then the diameter of all lesions found on the test pods was measured. An index rating on a scale 0-4 was used (0=no infection, 1=1-2 cm lesions, 2=2-4cm lesions, 3=4-6 cm lesions and 4=lesion diameter more than 6 cm). When 70% or more of the pods tested for a given clone rated 0 and 1, the clone was classed as resistant. Experiments were conducted during 1980-1982 when conditions were favourable to the pathogen. All experiments were conducted at the Central Experiment Station, Centeno, Trinidad. Disease - Phytophthora palmivora, P. megakarya (Local Names: Black Pod, Podredumbre negra, Pourriture Brune, Podridao parda).
Disease