Spatial and temporal dynamics of Colorado potato beetle (Coleoptera: Chrysomelidae) in fields with perimeter and spatially targeted insecticides

Paul E. Blom, Shelby Jay Fleischer, Zane Smilowitz

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Concern over insecticide resistance has led to the suggestion of spatially variable within-field management of Colorado potato beetle, Leptinotarsa decemlineata (Say). Here we compare L. decemlineata spatial and temporal dynamics, and potato yield, in fields treated with a narrow perimeter (5.5 m) of systemic imidacloprid supplemented with spatially targeted sprays to untreated fields and to fields where all rows received the systemic. The systemic targeted immigrating individuals which, having acquired the field through either flight or walking, first established themselves in the outer 5.5 m of the field. The perimeter treatment (≈25% of field area) reduced mean densities with no effect on timing of peak densities. Immigrating adults established similar spatial trends in both perimeter and untreated fields. Although trends in F1 larval densities have been shown to follow the patterns established by immigrating adults, trends in the F1 larval densities of the perimeter treatments diverged from adult patterns and developed highest densities in field centers. Immigrating adults had little to no spatial dependence in the covariance structure in any treatments. Spatial dependence in the covariance structure of F1 larval and F1 adult populations developed as density increased in both perimeter and untreated fields, with a tendency for increasing spatial dependence in perimeter fields, though this was not statistically significant. Comparing the perimeter to untreated fields, yields increased at a proportion that was higher than the proportion of land area treated, but remained significantly lower than the whole-field treatment. These results suggest that the perimeter tactic has promise as a site-specific resistance management program, but that refinement of border width is needed to optimize trade-offs among yield, quality, and long-term maintenance of susceptibility.

Original languageEnglish (US)
Pages (from-to)149-159
Number of pages11
JournalEnvironmental Entomology
Volume31
Issue number1
DOIs
StatePublished - Jan 1 2002

Fingerprint

Leptinotarsa decemlineata
Chrysomelidae
potato
insecticide
beetle
insecticides
Coleoptera
resistance management
imidacloprid
walking
spray
flight
insecticide resistance
trend
potatoes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Insect Science

Cite this

@article{9f7fc348376b4256baeb44703727d08e,
title = "Spatial and temporal dynamics of Colorado potato beetle (Coleoptera: Chrysomelidae) in fields with perimeter and spatially targeted insecticides",
abstract = "Concern over insecticide resistance has led to the suggestion of spatially variable within-field management of Colorado potato beetle, Leptinotarsa decemlineata (Say). Here we compare L. decemlineata spatial and temporal dynamics, and potato yield, in fields treated with a narrow perimeter (5.5 m) of systemic imidacloprid supplemented with spatially targeted sprays to untreated fields and to fields where all rows received the systemic. The systemic targeted immigrating individuals which, having acquired the field through either flight or walking, first established themselves in the outer 5.5 m of the field. The perimeter treatment (≈25{\%} of field area) reduced mean densities with no effect on timing of peak densities. Immigrating adults established similar spatial trends in both perimeter and untreated fields. Although trends in F1 larval densities have been shown to follow the patterns established by immigrating adults, trends in the F1 larval densities of the perimeter treatments diverged from adult patterns and developed highest densities in field centers. Immigrating adults had little to no spatial dependence in the covariance structure in any treatments. Spatial dependence in the covariance structure of F1 larval and F1 adult populations developed as density increased in both perimeter and untreated fields, with a tendency for increasing spatial dependence in perimeter fields, though this was not statistically significant. Comparing the perimeter to untreated fields, yields increased at a proportion that was higher than the proportion of land area treated, but remained significantly lower than the whole-field treatment. These results suggest that the perimeter tactic has promise as a site-specific resistance management program, but that refinement of border width is needed to optimize trade-offs among yield, quality, and long-term maintenance of susceptibility.",
author = "Blom, {Paul E.} and Fleischer, {Shelby Jay} and Zane Smilowitz",
year = "2002",
month = "1",
day = "1",
doi = "10.1603/0046-225X-31.1.149",
language = "English (US)",
volume = "31",
pages = "149--159",
journal = "Environmental Entomology",
issn = "0046-225X",
publisher = "Entomological Society of America",
number = "1",

}

Spatial and temporal dynamics of Colorado potato beetle (Coleoptera : Chrysomelidae) in fields with perimeter and spatially targeted insecticides. / Blom, Paul E.; Fleischer, Shelby Jay; Smilowitz, Zane.

In: Environmental Entomology, Vol. 31, No. 1, 01.01.2002, p. 149-159.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spatial and temporal dynamics of Colorado potato beetle (Coleoptera

T2 - Chrysomelidae) in fields with perimeter and spatially targeted insecticides

AU - Blom, Paul E.

AU - Fleischer, Shelby Jay

AU - Smilowitz, Zane

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Concern over insecticide resistance has led to the suggestion of spatially variable within-field management of Colorado potato beetle, Leptinotarsa decemlineata (Say). Here we compare L. decemlineata spatial and temporal dynamics, and potato yield, in fields treated with a narrow perimeter (5.5 m) of systemic imidacloprid supplemented with spatially targeted sprays to untreated fields and to fields where all rows received the systemic. The systemic targeted immigrating individuals which, having acquired the field through either flight or walking, first established themselves in the outer 5.5 m of the field. The perimeter treatment (≈25% of field area) reduced mean densities with no effect on timing of peak densities. Immigrating adults established similar spatial trends in both perimeter and untreated fields. Although trends in F1 larval densities have been shown to follow the patterns established by immigrating adults, trends in the F1 larval densities of the perimeter treatments diverged from adult patterns and developed highest densities in field centers. Immigrating adults had little to no spatial dependence in the covariance structure in any treatments. Spatial dependence in the covariance structure of F1 larval and F1 adult populations developed as density increased in both perimeter and untreated fields, with a tendency for increasing spatial dependence in perimeter fields, though this was not statistically significant. Comparing the perimeter to untreated fields, yields increased at a proportion that was higher than the proportion of land area treated, but remained significantly lower than the whole-field treatment. These results suggest that the perimeter tactic has promise as a site-specific resistance management program, but that refinement of border width is needed to optimize trade-offs among yield, quality, and long-term maintenance of susceptibility.

AB - Concern over insecticide resistance has led to the suggestion of spatially variable within-field management of Colorado potato beetle, Leptinotarsa decemlineata (Say). Here we compare L. decemlineata spatial and temporal dynamics, and potato yield, in fields treated with a narrow perimeter (5.5 m) of systemic imidacloprid supplemented with spatially targeted sprays to untreated fields and to fields where all rows received the systemic. The systemic targeted immigrating individuals which, having acquired the field through either flight or walking, first established themselves in the outer 5.5 m of the field. The perimeter treatment (≈25% of field area) reduced mean densities with no effect on timing of peak densities. Immigrating adults established similar spatial trends in both perimeter and untreated fields. Although trends in F1 larval densities have been shown to follow the patterns established by immigrating adults, trends in the F1 larval densities of the perimeter treatments diverged from adult patterns and developed highest densities in field centers. Immigrating adults had little to no spatial dependence in the covariance structure in any treatments. Spatial dependence in the covariance structure of F1 larval and F1 adult populations developed as density increased in both perimeter and untreated fields, with a tendency for increasing spatial dependence in perimeter fields, though this was not statistically significant. Comparing the perimeter to untreated fields, yields increased at a proportion that was higher than the proportion of land area treated, but remained significantly lower than the whole-field treatment. These results suggest that the perimeter tactic has promise as a site-specific resistance management program, but that refinement of border width is needed to optimize trade-offs among yield, quality, and long-term maintenance of susceptibility.

UR - http://www.scopus.com/inward/record.url?scp=0036488353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036488353&partnerID=8YFLogxK

U2 - 10.1603/0046-225X-31.1.149

DO - 10.1603/0046-225X-31.1.149

M3 - Article

AN - SCOPUS:0036488353

VL - 31

SP - 149

EP - 159

JO - Environmental Entomology

JF - Environmental Entomology

SN - 0046-225X

IS - 1

ER -