Fixed-precision sequential sampling plans for estimating alfalfa caterpillar, Colias lesbia, egg density in alfalfa, Medicago sativa, fields in Córdoba, Argentina
2013
Serra, Gerardo Víctor | La Porta, Norma Cristina | Avalos, Delia Susana | Mazzuferi, Vilma Encarnación
Fil: Serra, Gerardo Víctor. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]Fil: La Porta, Norma Cristina. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]Fil: Avalos, Delia Susana. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]Fil: Mazzuferi, Vilma Encarnación. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]The alfalfa caterpillar, Colias lesbia (Fabricius) (Lepidoptera: Pieridae), is a major pest of alfalfa, Medicago sativa L. (Fabales: Fabaceae), crops in Argentina. Its management is based mainly on chemical control of larvae whenever the larvae exceed the action threshold. To develop and vali-date fixed-precision sequential sampling plans, an intensive sampling programme for C. lesbia eggs was carried out in two alfalfa plots located in the Province of Córdoba, Argentina, from 1999 to 2002. Using Resampling for Validation of Sampling Plans software, 12 additional inde-pendent data sets were used to validate the sequential sampling plan with precision levels of 0.10 and 0.25 (SE/mean), respectively. For a range of mean densities of 0.10 to 8.35 eggs/sample, an average sample size of only 27 and 26 sample units was required to achieve a desired precision level of 0.25 for the sampling plans of Green and Kuno, respectively. As the precision level was increased to 0.10, average sample size increased to 161 and 157 sample units for the sampling plans of Green and Kuno, respectively. We recommend using Green’s sequential sampling plan because it is less sensitive to changes in egg density. These sampling plans are a valuable tool for researchers to study population dynamics and to evaluate integrated pest management strategies.
Show more [+] Less [-]publishedVersion
Show more [+] Less [-]Fil: Serra, Gerardo Víctor. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]Fil: La Porta, Norma Cristina. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]Fil: Avalos, Delia Susana. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
Show more [+] Less [-]Fil: Mazzuferi, Vilma Encarnación. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Zoología Agrícola; Argentina.
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