Host range specificity of scymnus camptodromus (coleoptera

Coccinellidae), a predator of hemlock woolly adelgid (Hemiptera: Adelgidae)

Samita Limbu, Katie Cassidy, Melody Keena, Patrick Tobin, Kelli Hoover

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Scymnus (Neopullus) camptodromus Yu and Liu (Coleoptera: Coccinellidae) was brought to the United States from China as a potential biological control agent for hemlock woolly adelgid (Adelges tsugae Annand) (Hemiptera: Adelgidae). Scymnus camptodromus phenology is closely synchronized with that of A. Tsugae and has several characteristics of a promising biological control agent. As a prerequisite to field release, S. camptodromus was evaluated for potential nontarget impacts. In host range studies, the predator was given the choice of sympatric adelgid and nonadelgid prey items. Nontarget testing showed that S. camptodromus will feed to some degree on other adelgid species, but highly prefers A. Tsugae. We also evaluated larval development of S. camptodromus on pine bark adelgid (Pineus strobi (Hartig)) (Hemiptera: Adelgidae) and larch adelgid (Adelges laricis Vallot) (Hemiptera: Adelgidae); a small proportion of predator larvae was able to develop to adulthood on P. Strobi or A. Laricis alone. Scymnus camptodromus showed no interest in feeding on woolly alder aphid (Paraprociphilus tessellatus Fitch) (Hemiptera: Aphididae) or woolly apple aphid (Eriosoma lanigerum (Hausmann)) (Hemiptera: Aphididae), and minimal interest in cotton aphid (Aphis gossypii Glover) (Hemiptera: Aphididae) in choice and no-choice experiments. Scymnus camptodromus females did not oviposit on any host material other than A. Tsugae-infested hemlock. Under the circumstances of the study, S. camptodromus appears to be a specific predator of A. Tsugae, with minimal risk to nontarget species. Although the predator can develop on P. Strobi, the likelihood that S. camptodromus would oviposit on pine hosts of this adelgid is small.

Original languageEnglish (US)
Pages (from-to)94-100
Number of pages7
JournalEnvironmental Entomology
Volume45
Issue number1
DOIs
StatePublished - Feb 1 2016

Fingerprint

Adelgidae
Scymnus
host range
Coccinellidae
Hemiptera
aphid
predator
Coleoptera
predators
biological control
Tsuga
Paraprociphilus tessellatus
Adelges laricis
larval development
Aphididae
Eriosoma lanigerum
Adelges tsugae
phenology
bark
cotton

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Host range specificity of scymnus camptodromus (coleoptera: Coccinellidae), a predator of hemlock woolly adelgid (Hemiptera: Adelgidae)",
abstract = "Scymnus (Neopullus) camptodromus Yu and Liu (Coleoptera: Coccinellidae) was brought to the United States from China as a potential biological control agent for hemlock woolly adelgid (Adelges tsugae Annand) (Hemiptera: Adelgidae). Scymnus camptodromus phenology is closely synchronized with that of A. Tsugae and has several characteristics of a promising biological control agent. As a prerequisite to field release, S. camptodromus was evaluated for potential nontarget impacts. In host range studies, the predator was given the choice of sympatric adelgid and nonadelgid prey items. Nontarget testing showed that S. camptodromus will feed to some degree on other adelgid species, but highly prefers A. Tsugae. We also evaluated larval development of S. camptodromus on pine bark adelgid (Pineus strobi (Hartig)) (Hemiptera: Adelgidae) and larch adelgid (Adelges laricis Vallot) (Hemiptera: Adelgidae); a small proportion of predator larvae was able to develop to adulthood on P. Strobi or A. Laricis alone. Scymnus camptodromus showed no interest in feeding on woolly alder aphid (Paraprociphilus tessellatus Fitch) (Hemiptera: Aphididae) or woolly apple aphid (Eriosoma lanigerum (Hausmann)) (Hemiptera: Aphididae), and minimal interest in cotton aphid (Aphis gossypii Glover) (Hemiptera: Aphididae) in choice and no-choice experiments. Scymnus camptodromus females did not oviposit on any host material other than A. Tsugae-infested hemlock. Under the circumstances of the study, S. camptodromus appears to be a specific predator of A. Tsugae, with minimal risk to nontarget species. Although the predator can develop on P. Strobi, the likelihood that S. camptodromus would oviposit on pine hosts of this adelgid is small.",
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Host range specificity of scymnus camptodromus (coleoptera : Coccinellidae), a predator of hemlock woolly adelgid (Hemiptera: Adelgidae). / Limbu, Samita; Cassidy, Katie; Keena, Melody; Tobin, Patrick; Hoover, Kelli.

In: Environmental Entomology, Vol. 45, No. 1, 01.02.2016, p. 94-100.

Research output: Contribution to journalArticle

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AB - Scymnus (Neopullus) camptodromus Yu and Liu (Coleoptera: Coccinellidae) was brought to the United States from China as a potential biological control agent for hemlock woolly adelgid (Adelges tsugae Annand) (Hemiptera: Adelgidae). Scymnus camptodromus phenology is closely synchronized with that of A. Tsugae and has several characteristics of a promising biological control agent. As a prerequisite to field release, S. camptodromus was evaluated for potential nontarget impacts. In host range studies, the predator was given the choice of sympatric adelgid and nonadelgid prey items. Nontarget testing showed that S. camptodromus will feed to some degree on other adelgid species, but highly prefers A. Tsugae. We also evaluated larval development of S. camptodromus on pine bark adelgid (Pineus strobi (Hartig)) (Hemiptera: Adelgidae) and larch adelgid (Adelges laricis Vallot) (Hemiptera: Adelgidae); a small proportion of predator larvae was able to develop to adulthood on P. Strobi or A. Laricis alone. Scymnus camptodromus showed no interest in feeding on woolly alder aphid (Paraprociphilus tessellatus Fitch) (Hemiptera: Aphididae) or woolly apple aphid (Eriosoma lanigerum (Hausmann)) (Hemiptera: Aphididae), and minimal interest in cotton aphid (Aphis gossypii Glover) (Hemiptera: Aphididae) in choice and no-choice experiments. Scymnus camptodromus females did not oviposit on any host material other than A. Tsugae-infested hemlock. Under the circumstances of the study, S. camptodromus appears to be a specific predator of A. Tsugae, with minimal risk to nontarget species. Although the predator can develop on P. Strobi, the likelihood that S. camptodromus would oviposit on pine hosts of this adelgid is small.

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