Where and How to Sample Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) in Solanum tuberosum

The potato tuber moth, Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae) is a major potato pest in the tropics and subtropics where it causes economic losses both in the field and in storage. The objective of this study was to determine a sampling plan that included a sampling unit and numbe...

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Bibliographic Details
Published in:Potato research 2022-09, Vol.65 (3), p.663-676
Main Authors: Alves, Flávia M., Gonring, Alfredo H. R., de S. Fernandes, Maria E., Bastos, Cristina S., Fernandes, Flávio Lemes
Format: Article
Language:English
Subjects:
Agriculture
Analysis
Biomedical and Life Sciences
Butterflies & moths
Economic impact
Frequency analysis
Frequency distribution
Gelechiidae
Leaves
Lepidoptera
Life Sciences
Methods
Mineral industry
Mines
Mining industry
Monitoring
Phthorimaea operculella
Plant Genetics and Genomics
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Potatoes
Sampling
Tropical environments
Vegetables
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Summary:The potato tuber moth, Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae) is a major potato pest in the tropics and subtropics where it causes economic losses both in the field and in storage. The objective of this study was to determine a sampling plan that included a sampling unit and number of samples necessary for monitoring P. operculella infestations in potato fields. Eight commercial potato fields were monitored totaling 23 ha. All leaves from 670 plants were sampled and numbered from plant apex down. Frequency analysis was performed to select the most frequent leaves that would compose the sample unit. Next, a frequency distribution model was calculated, and the ideal number of samples needed to monitor P. operculella mines was obtained for the sampling plan. The most representative (highest Pearson correlation ( r = 0.74) and determination ( R 2 = 0.55) coefficients) and precise (smallest relative variances; RV= 8.26%) sampling unit for monitoring P. operculella mines in potato fields was leaf 8. The frequency distribution model selected was a negative binomial and the K common value was 0.8803. The ideal number of samples, based on the allowable precision error, was 23 leaves per 10 ha plot.
ISSN:0014-3065
1871-4528
DOI:10.1007/s11540-022-09546-z