Sequential sampling for panicle caterpillars (Lepidoptera: Noctuidae) in sorghum

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dc.contributor.author Elliott, N. C.
dc.contributor.author Brewer, M. J.
dc.contributor.author Giles, K. L.
dc.contributor.author Backoulou, G. F.
dc.contributor.author McCornack, Brian P.
dc.contributor.author Pendleton, B. B.
dc.contributor.author Royer, T. A.
dc.date.accessioned 2014-07-08T21:31:47Z
dc.date.available 2014-07-08T21:31:47Z
dc.date.issued 2014-07-08
dc.identifier.uri http://hdl.handle.net/2097/17911
dc.description Citation: Elliott, N. C., M. J. Brewer, K. L. Giles, G. F. Backoulou, B. P. McCornack, B. B. Pendleton, and T. A. Royer. 2014. “Sequential Sampling for Panicle Caterpillars (Lepidoptera: Noctuidae) in Sorghum.” Journal of Economic Entomology 107 (2): 846–53. https://doi.org/10.1603/EC13413.
dc.description.abstract Panicle caterpillars comprise an economically important insect pest complex of sorghum throughout the Great Plains of the United States, particularly in Kansas, Oklahoma, and Texas. The sorghum panicle caterpillar complex consists of larvae of two polyphagous lepidopteran species: the corn earworm, Helicoverpa zea (Boddie), and fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae). Sampling for panicle caterpillars in sorghum fields is usually accomplished by the beat bucket sampling technique with a fixed sample size of 30 beat bucket samples of one sorghum panicle each per 16.2 ha of field. We used Wald's sequential probability ratio test for a negative binomial distribution to develop a sequential sampling plan for panicle caterpillars. In total, 115 sorghum fields were sampled in Kansas, Oklahoma, and Texas from June to August 2010. Panicle caterpillars had an aggregated distribution of counts confirmed by Pearson's chi-square statistic for lack of fit to the negative binomial distribution for each sampled field. A sequential sampling plan was developed using a high threshold (an economic threshold) of 0.5 caterpillars per sorghum panicle, a low threshold (a safe level) of 0.20 caterpillars per panicle, and fixed error rates (α = 0.10 and β = 0.05). At caterpillar densities >0.45 and <0.12 per panicle, the average number of panicles inspected to make a decision was less than the current recommendation of 30. In a 2013 validation test of 25 fields, the expected number of samples taken from average sample number curve was in close agreement with the number of samples required using the sequential plan (r 2 = 0.93), and all fields were correctly classified when compared with a fixed sample size result. The plan improved upon current sampling recommendations for panicle caterpillars in sorghum because at known acceptable fixed error rates fewer samples were required when caterpillars are scarce or abundant, whereas more samples were required to make decisions with the same acceptable error rates when densities were near the economic thresholds. en_US
dc.language.iso en_US en_US
dc.relation.uri https://doi.org/10.1603/EC13413 en_US
dc.rights © 2014 Entomological Society of America This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com. en_US
dc.rights.uri http://creativecommons.org/licenses/by-nc/3.0/
dc.subject Integrated pest management (IPM) en_US
dc.subject Sequential sampling en_US
dc.subject Corn earworm en_US
dc.subject Fall armyworm en_US
dc.subject Helicoverpa zea en_US
dc.title Sequential sampling for panicle caterpillars (Lepidoptera: Noctuidae) in sorghum en_US
dc.type Text en_US
dc.date.published 2014 en_US
dc.citation.doi 10.1603/EC13413 en_US
dc.citation.epage 853 en_US
dc.citation.issn 0022-0493
dc.citation.issue 2 en_US
dc.citation.jtitle Journal of Economic Entomology en_US
dc.citation.spage 846 en_US
dc.citation.volume 107 en_US
dc.citation Elliott, N. C., M. J. Brewer, K. L. Giles, G. F. Backoulou, B. P. McCornack, B. B. Pendleton, and T. A. Royer. 2014. “Sequential Sampling for Panicle Caterpillars (Lepidoptera: Noctuidae) in Sorghum.” Journal of Economic Entomology 107 (2): 846–53. https://doi.org/10.1603/EC13413.
dc.contributor.authoreid mccornac en_US
dc.description.version Article: Publisher version


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© 2014 Entomological Society of America This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com. Except where otherwise noted, the use of this item is bound by the following: © 2014 Entomological Society of America This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.

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