Laker, Henry2008-12-042008-12-042008-12-04https://hdl.handle.net/2139/1907enPlease contact the West Indiana Division at the University of the West Indies,St.Augustine in order to view the full thesis. Contact: wimail@sta.uwi.eduWitches' broom diseaseCacao -- Diseases and pests -- Trinidad and TobagoPathogenic fungi -- Trinidad and TobagoStudies on pathogenic variability of Crinipellis Perniciosa (Stahel) Singer in TrinidadThesis