W. Soberanis et al., Increased frequency of phytosanitary pod removal in cacao (Theobroma cacao) increases yield economically in eastern Peru, CROP PROT, 18(10), 1999, pp. 677-685
Diseases caused by Moniliophthora roreri (moniliasis), Crinipellis pernicio
sa (witches' broom) and Phytophthora palmivora (black pod) are the most imp
ortant factors limiting cocoa production in Peru and cultural management is
considered to be the only practical means of control for the smallholder.
The objective of this study was to develop an epidemiologically and economi
cally sound control recommendation based on the frequency of phytosanitary
pod removal. Weekly removal of diseased pods reduced the incidence of disea
ses significantly in comparison with fortnightly removal. In three fields,
moniliasis was decreased by 26-41%, black pod by 35-66% and witches' broom
on pods by 14-57%. The cumulative effect was a consistent yield increase fr
om an average of 504-660 kg ha(-1) yr(-1). Returns compensated for increase
d labour costs. Weekly pod removal was 32% more profitable. Timecourse anal
yses indicated that weekly removal should be practised throughout the year
under field conditions of eastern Peru. (C) 2000 Elsevier Science Ltd. All
rights reserved.