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Revista Chapingo serie ciencias forestales y del ambiente
On-line version ISSN 2007-4018Print version ISSN 2007-3828
Abstract
MORA-CASTANEDA, Jesús G. de la et al. Cost-benefit of trapping and population fluctuation of Rhynchophorus palmarum L. in coconut (Cocos nucifera L.) genotypes. Rev. Chapingo ser. cienc. for. ambient [online]. 2022, vol.28, n.3, pp.447-463. Epub Mar 08, 2024. ISSN 2007-4018. https://doi.org/10.5154/r.rchscfa.2022.02.010.
Introduction:
Rhynchophorus palmarum L. is the most destructive pest in Cocos nucifera plantations in Mexico.
Objective:
To estimate the cost-benefit of collecting R. palmarum by trapping in two coconut genotypes and to determine the correlation of trapping with environmental factors.
Materials and methods:
R. palmarum insects were captured on the genotypes ‘Alto Pacífico ecotipo 2’ (AP) and ‘Enano-Verde de Brasil’ (EVB) for one year. Five types of traps were used (BT = bucket type, TCT = trash can type, GT = gallon type, CSAT = Colegio Superior de Agricultura Tropical, BT = bottle type). Trapping was counted weekly, and the cost-benefit of trapping was determined. Trapping was analyzed with quasi-Poisson distribution, deviancy analysis and least significant difference. Trapping correlation with climate variables was determined with the Spearman's coefficient.
Results and discussion:
A total of 3 414 insects were captured in AP. TCT and CSAT were the most effective (P < 0.014) with 40.3 % and 32.7 % of the total adults, respectively; they also had the best cost-benefit, 4.3 MXN and 5.5 MXN per insect, respectively. In EVB, 3.56 times more insects were captured (4 799) compared to AP with a 29.6:6.4 ratio, using GT. In both orchards, the correlations of climate variables with trapping were weak (less than 50 %); relative humidity was the most highly correlated, but negative.
Conclusions:
The efficiency of traps and their cost-benefit will allow growers to determine which trap to use for mechanical and ethological (aggregation pheromone) control of R. palmarum.
Keywords : palm weevil; Alto Pacífico ecotipo 2; Enano-Verde de Brasil; insect trapping; biological pest control.