Patterns of egg mass deposition of platynota idaeusalis (Lepidoptera: Tortricidae) within an apple orchard

Alan L. Knight, Larry A. Hull, Edwin G. Rajotte

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Two field releases of rubidium (Rb)-labeled, laboratory-reared adult Platynota idaeusalis (Walker) were conducted to measure female adult dispersal and egg mass deposition patterns within a 33-ha (about 7,450 trees) apple orchard in Adams County, Pa. In both studies >3,200 virgin male and female adults (♂:♀ ratio = 1.1:1.0) were reared from rubidium-incorporated diet (3 g Rb/liter) and released on four center trees. Trees were randomly sampled for hatched and unhatched egg masses up to 500 m from the release sites. Atomic absorption spectrophotometry was used to detect rubidium in egg masses, and masses were considered marked if concentrations were > 10 ppb. Following the first release, 417 trees were sampled and 39% of the 222 egg masses collected were marked. Following the second release, 260 trees were sampled and 67% of the 346 egg masses collected were marked. The distribution of rubidium-labeled egg masses demonstrated that spatial patterns of egg mass deposition are primarily local and are affected by ambient air temperatures. For example, 90% of all recovered rubidium-labeled egg masses were found within 65 and 45 m of the release sites, and the most distant labeled egg mass was found at 250 and 170 m, respectively, following adult releases during a warm period in July (daily minimum temperatures, > 16°C) and a cooler period in September (daily minimum temperatures, <12°C).

Original languageEnglish (US)
Pages (from-to)648-655
Number of pages8
JournalEnvironmental Entomology
Volume19
Issue number6
DOIs
StatePublished - Dec 1 1990

Fingerprint

Platynota idaeusalis
Tortricidae
orchard
egg masses
rubidium
orchards
apples
Lepidoptera
egg
tree release
coolers
spectrophotometry
spectroscopy
ambient air
ambient temperature
air temperature
temperature

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Patterns of egg mass deposition of platynota idaeusalis (Lepidoptera: Tortricidae) within an apple orchard",
abstract = "Two field releases of rubidium (Rb)-labeled, laboratory-reared adult Platynota idaeusalis (Walker) were conducted to measure female adult dispersal and egg mass deposition patterns within a 33-ha (about 7,450 trees) apple orchard in Adams County, Pa. In both studies >3,200 virgin male and female adults (♂:♀ ratio = 1.1:1.0) were reared from rubidium-incorporated diet (3 g Rb/liter) and released on four center trees. Trees were randomly sampled for hatched and unhatched egg masses up to 500 m from the release sites. Atomic absorption spectrophotometry was used to detect rubidium in egg masses, and masses were considered marked if concentrations were > 10 ppb. Following the first release, 417 trees were sampled and 39{\%} of the 222 egg masses collected were marked. Following the second release, 260 trees were sampled and 67{\%} of the 346 egg masses collected were marked. The distribution of rubidium-labeled egg masses demonstrated that spatial patterns of egg mass deposition are primarily local and are affected by ambient air temperatures. For example, 90{\%} of all recovered rubidium-labeled egg masses were found within 65 and 45 m of the release sites, and the most distant labeled egg mass was found at 250 and 170 m, respectively, following adult releases during a warm period in July (daily minimum temperatures, > 16°C) and a cooler period in September (daily minimum temperatures, <12°C).",
author = "Knight, {Alan L.} and Hull, {Larry A.} and Rajotte, {Edwin G.}",
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Patterns of egg mass deposition of platynota idaeusalis (Lepidoptera : Tortricidae) within an apple orchard. / Knight, Alan L.; Hull, Larry A.; Rajotte, Edwin G.

In: Environmental Entomology, Vol. 19, No. 6, 01.12.1990, p. 648-655.

Research output: Contribution to journalArticle

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