Data/hora: 03/06/2024 02:57:22

Biblioteca(s): | Embrapa Meio Ambiente.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | B - 2
Data corrente: | 08/11/2018
Data da última atualização: | 08/11/2018
Autoria: | ARISTIZÁBAL, L. F.; SHRINER, S.; HOLLINGSWORTH, R.; MASCARIN, G. M.; CHAVES, B.; MATSUMOTO, T.; ARTHURS, S. P.
Afiliação: | LUIS F ARISTIZABAL; SUZANNE SCHRINER, Synergistic Hawaii Agriculture Council; ROBERT HOLLINGSWORTH, Daniel K. Inouye US Pacific Basin Agricultural Research Center; GABRIEL MOURA MASCARIN, CNPMA; BERNARDO CHAVES, Washington State University; TRAICE MATSUMOTO, Daniel K. Inouye US Pacific Basin Agricultural Research Center; STEVEN P ARTHURS, Texas A&M University.
Título: | Field sampling strategies for coffee berry borer (Coleoptera: Curculionidae: Scolytinae) infesting berries in coffee farms in Hawaii.
Ano de publicação: | 2018
Fonte/Imprenta: | International Journal of Tropical Insect Science, v. 38, n. 4, p. 418?426, 2018.
ISSN: | 1742-7592
DOI: | https://doi.org/10.1017/S174275841800022X
Idioma: | Inglês
Conteúdo: | Abstract: The coffee berry borer (CBB), Hypothenemus hampei Ferrari, a recent invader to Hawaii, is impacting coffee growers by reducing yields and quality and increasing production costs. Monitoring strategies are needed to assess infestations and where control operations are warranted, and evaluate their effectiveness. To develop and validate a fixed-precision sequential sampling plan, an intensive CBB sampling programme was conducted in 17 small farms in Kona and Kau districts in the Big Island in 2016/17. At each location, 30 trees/ha were monitored at 2-4 week intervals. Results show that the CBB has an aggregated spatial distribution based on Taylor's power law parameters. According to Green's stop line formula, between 6 and 50 coffee branches per ha (sample unit) are required to estimate infestation rates of 1.5-2.5% infested green berries (suggested economic threshold) with a precision fixed at 10 to 25%. Concurrently, a modified strategy was tested on 14 farms, in which only infested green berries (not total) was counted. The standard and modified sampling methods were highly correlated (R2 >- 0.98), while the modified approach required on average only 35 min (27% less time) to complete, with an additional 24 min taken to observe the position of the CBB inside the berry. Our data also show that berry infestation rates of CBB prior to harvest were a good predictor of the total defects resulting in processed green coffee from these farms (Pearson's r coefficient of 0.82). Our findings support improved sampling for the CBB under Hawaiian conditions using a simpler and faster monitoring strategy based on counting green infested berries.
Palavras-Chave: | Broca do café; Sequential sampling plan.
Thesagro: | Café; Hypothenemus Hampei; Praga de Planta.
Thesaurus Nal: | Pest monitoring; Plant pests.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (16194-1) - UPC - AP - DD -  -  -  - DIS