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Funded Project
Funding Program: Enhancement Grants - Special Projects
Project Title: Integrated Pest Management for Black Sigatoka, Mycosphaerella fijiensis Morelet, in Puerto Rico
Project Directors (PDs):
Wanda I. Almodovar [1]
Ada N. Alvarado-Ortiz [2]
Manuel Diaz [3]
Lead State: PR

Lead Organization: Puerto Rico Cooperative Extension Service
Undesignated Funding: $12,000
Start Date: Aug-01-2005

End Date: Jul-31-2006
Pests Involved: Black sigatoka
Site/Commodity: banana; plantain
Summary: In June 2004, Black sigatoka, (BS), Mycosphaerella fijiensis Morelet was detected for the first time in Puerto Rico. The presence of the disease was confirmed after observing the microscopic characteristics of the pathogen's anamorph, Paracercospora fijiensis, on affected leaves. For the species occurring on Musa, anamorph morphology are more informative and can be use to separate the major pathogens. BS, which is also known as black leaf streak, causes significant reductions in leaf area, yield losses of 50% or more and premature ripening, a serious defect in exported fruit. It is more damaging and difficult to control than Yellow Sigatoka (YS), Mycosphaerella musicola, and has a wider host range that includes the plantains and dessert and ABB cooking bananas that are usually not affected by YS. This makes it necessary to develop a sustainable approach for the management of the disease. Through this special project we will use PCR to detect Mycosphaerella fijiensis causing leaf spot in banana and plantain at municipalities of the western area of Puerto Rico, the geographic region where the disease was first detected; develop a package of IPM for banana and plantain with the latest information on effective BS control and implement on-farm demonstrations to validate the technology. Useful IPM information from other countries with similar geography and type of farmer (small) will be adapted to make the IPM package. This will include symptoms of the diseases, biology and ecology of the black sigatoka pathogen, resistant varieties, climatic factors and development of the disease, evaluation of disease incidence in the field, cultural management practices, calibration of pesticide equipment, types of fungicides and application, information about sensitivity of BS to fungicides, color photographs, and illustrations. The on-farm demonstrations will serve to validate the efficacy of the recommended practices and will be made in collaboration with growers and Extension personnel. These will reduce the impact of BS in plantain and banana in Puerto Rico. This project will utilize research and extension involvement in addressing IPM. The time frame proposed is a two-year project. During the first year we will use PCR to detect and identify BS, make on-farm demonstrations in two municipalities and begin with the compilation of information necessary to make the IPM package. In the second year a much broader geographic area will be involved to make demonstrations on farms of affected growers . The IPM package will be developed during the first year and information generated during the duration of the project about monitoring of fungicides sensitivity and successful management practices will be included.

Objectives: 1.Use of PCR to detect Mycosphaerella fijiensis causing leaf spots in banana and plantain at municipalities of the western area of Puerto Rico. 2.Develop an IPM package for Black Sigatoka 3.Make on farm demonstrations of the IPM package.


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