Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i
Coffee leaf rust (CLR), Hemileia vastatrix, is a disease that has severely impacted the major coffee growing areas of the world. The discovery of CLR in Hawaii in October 2020 was devastating news to local growers, as it quickly spread to all coffee-growing areas, threatening the second-highest-valu...
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Czech Academy of Agricultural Sciences
2025-04-01
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| Series: | Plant Protection Science |
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| Online Access: | https://pps.agriculturejournals.cz/artkey/pps-202502-0004_comparative-evaluation-of-fungicide-effectiveness-in-controlling-coffee-leaf-rust-in-hawai-8216-i.php |
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| author | Zhening Zhang Julia A. Coughlin James K.F. Kam Zhiqiang Cheng |
| author_facet | Zhening Zhang Julia A. Coughlin James K.F. Kam Zhiqiang Cheng |
| author_sort | Zhening Zhang |
| collection | DOAJ |
| description | Coffee leaf rust (CLR), Hemileia vastatrix, is a disease that has severely impacted the major coffee growing areas of the world. The discovery of CLR in Hawaii in October 2020 was devastating news to local growers, as it quickly spread to all coffee-growing areas, threatening the second-highest-valued crop in the State. Although the fungicide Priaxor Xemium had been approved as a Section 18 emergency exemption, there was still an urgent need for true systemic fungicides to provide sustained control of the disease. The study's overall objective was to test the efficacy of various systemic fungicides against CLR in field conditions. During the coffee growing season for two years, various fungicides were tested on two farms in the Kona district of Hawaii. Treated trees showed an 84% reduction in CLR incidence compared to untreated trees in Year 1 and a 79% reduction in Year 2 by the end of the study. Treated trees also had 12% and 38% more total leaves per branch than untreated trees in Years 1 and 2, respectively. All fungicide treatments provided excellent or good control of CLR compared to the untreated control under the climate of Hawaii. |
| format | Article |
| id | doaj-art-91c523d5b9854338b2ecb11c0cea965b |
| institution | OA Journals |
| issn | 1212-2580 1805-9341 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Plant Protection Science |
| spelling | doaj-art-91c523d5b9854338b2ecb11c0cea965b2025-08-20T01:51:53ZengCzech Academy of Agricultural SciencesPlant Protection Science1212-25801805-93412025-04-0161216217110.17221/92/2024-PPSpps-202502-0004Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'iZhening Zhang0Julia A. Coughlin1James K.F. Kam2Zhiqiang Cheng3Department of Plant and Environmental Protection Sciences, College of Tropical College of Tropical Agriculture and Human Resources, University of Hawaii at Mānoa, Honolulu, Hawaii, USADepartment of Plant and Environmental Protection Sciences, College of Tropical College of Tropical Agriculture and Human Resources, University of Hawaii at Mānoa, Honolulu, Hawaii, USADepartment of Plant and Environmental Protection Sciences, College of Tropical College of Tropical Agriculture and Human Resources, University of Hawaii at Mānoa, Honolulu, Hawaii, USADepartment of Plant and Environmental Protection Sciences, College of Tropical College of Tropical Agriculture and Human Resources, University of Hawaii at Mānoa, Honolulu, Hawaii, USACoffee leaf rust (CLR), Hemileia vastatrix, is a disease that has severely impacted the major coffee growing areas of the world. The discovery of CLR in Hawaii in October 2020 was devastating news to local growers, as it quickly spread to all coffee-growing areas, threatening the second-highest-valued crop in the State. Although the fungicide Priaxor Xemium had been approved as a Section 18 emergency exemption, there was still an urgent need for true systemic fungicides to provide sustained control of the disease. The study's overall objective was to test the efficacy of various systemic fungicides against CLR in field conditions. During the coffee growing season for two years, various fungicides were tested on two farms in the Kona district of Hawaii. Treated trees showed an 84% reduction in CLR incidence compared to untreated trees in Year 1 and a 79% reduction in Year 2 by the end of the study. Treated trees also had 12% and 38% more total leaves per branch than untreated trees in Years 1 and 2, respectively. All fungicide treatments provided excellent or good control of CLR compared to the untreated control under the climate of Hawaii.https://pps.agriculturejournals.cz/artkey/pps-202502-0004_comparative-evaluation-of-fungicide-effectiveness-in-controlling-coffee-leaf-rust-in-hawai-8216-i.phpcoffea arabicadisease incidencehawaii coffee industryintegrated pest management |
| spellingShingle | Zhening Zhang Julia A. Coughlin James K.F. Kam Zhiqiang Cheng Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i Plant Protection Science coffea arabica disease incidence hawaii coffee industry integrated pest management |
| title | Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i |
| title_full | Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i |
| title_fullStr | Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i |
| title_full_unstemmed | Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i |
| title_short | Comparative evaluation of fungicide effectiveness in controlling Coffee leaf rust in Hawai'i |
| title_sort | comparative evaluation of fungicide effectiveness in controlling coffee leaf rust in hawai i |
| topic | coffea arabica disease incidence hawaii coffee industry integrated pest management |
| url | https://pps.agriculturejournals.cz/artkey/pps-202502-0004_comparative-evaluation-of-fungicide-effectiveness-in-controlling-coffee-leaf-rust-in-hawai-8216-i.php |
| work_keys_str_mv | AT zheningzhang comparativeevaluationoffungicideeffectivenessincontrollingcoffeeleafrustinhawaii AT juliaacoughlin comparativeevaluationoffungicideeffectivenessincontrollingcoffeeleafrustinhawaii AT jameskfkam comparativeevaluationoffungicideeffectivenessincontrollingcoffeeleafrustinhawaii AT zhiqiangcheng comparativeevaluationoffungicideeffectivenessincontrollingcoffeeleafrustinhawaii |