Biology and morphology of Chelonus sp. nr. curvimaculatus (Hymenoptera: Braconidae) as a parasitoid of Pectinophora gossypiella (Lepidoptera Gelechiidae)

Matthew Hentz, Peter C Ellsworth, Steven Naranjo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A general description of the life stages of Chelonus sp. nr. curvimaculatus, an egg-larval parasitoid of pink bollworm, Pectinophora gossypiella (Saunders), is presented. Pink bollworms were reared in the laboratory on a wheat germ diet. At 29°C, parasitoid eggs (0.12-0.18 mm) begin to eclose ∼22 h after oviposition. Three instars occur in this species. The 1st instar is endoparasitic and ranged in length from 0.14 mm (neonate) to 1.25 mm (∼9 d old. end of the 1st stadium). The 2nd instar also is endoparasitic and is 1.89-3.04 mm long. This stadium lasts ∼2-3 d. The 3rd instar is an average of 3.82 mm long and is endoparasitic early in its development but becomes ectoparasitic toward the completion of its development. This stadium lasts ∼3 d. The pupal stage lasts ∼6-7 d. Adult parasitoids begin to emerge ∼21 d after oviposition. Parasitized and unparasitized pink bollworm larvae deceloped through 4 stadia. Larval head capsule widths. body lengths, and weights of parasitized pink bollworms are significantly smaller than those of unparasitized larvae during the 3rd and 4th stadia. Parasitized 4th-instar pink bollworms have a mean head width of 0.8687 mm, body length of 6.28 mm, and weight of 6.9 mg. Fourth-instar unparasitized pink bollworm measurements were 1.0743 mm, 9.31 mm, and 17.7 mg, respectively.

Original languageEnglish (US)
Pages (from-to)631-639
Number of pages9
JournalAnnals of the Entomological Society of America
Volume90
Issue number5
StatePublished - Sep 1997

Fingerprint

Chelonus
Pectinophora gossypiella
Gelechiidae
Braconidae
parasitoid
oviposition
Hymenoptera
Lepidoptera
larva
instars
egg parasitoid
Biological Sciences
neonate
wheat
diet
egg
body length
wheat germ
larvae
parasitoids

Keywords

  • Biological control
  • Chelonus sp. nr. curcimaculatus
  • Parasitoid
  • Pectinophora gossypiella

ASJC Scopus subject areas

  • Insect Science
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

@article{bbe120431bb04246bffe3c47ca1bc10d,
title = "Biology and morphology of Chelonus sp. nr. curvimaculatus (Hymenoptera: Braconidae) as a parasitoid of Pectinophora gossypiella (Lepidoptera Gelechiidae)",
abstract = "A general description of the life stages of Chelonus sp. nr. curvimaculatus, an egg-larval parasitoid of pink bollworm, Pectinophora gossypiella (Saunders), is presented. Pink bollworms were reared in the laboratory on a wheat germ diet. At 29°C, parasitoid eggs (0.12-0.18 mm) begin to eclose ∼22 h after oviposition. Three instars occur in this species. The 1st instar is endoparasitic and ranged in length from 0.14 mm (neonate) to 1.25 mm (∼9 d old. end of the 1st stadium). The 2nd instar also is endoparasitic and is 1.89-3.04 mm long. This stadium lasts ∼2-3 d. The 3rd instar is an average of 3.82 mm long and is endoparasitic early in its development but becomes ectoparasitic toward the completion of its development. This stadium lasts ∼3 d. The pupal stage lasts ∼6-7 d. Adult parasitoids begin to emerge ∼21 d after oviposition. Parasitized and unparasitized pink bollworm larvae deceloped through 4 stadia. Larval head capsule widths. body lengths, and weights of parasitized pink bollworms are significantly smaller than those of unparasitized larvae during the 3rd and 4th stadia. Parasitized 4th-instar pink bollworms have a mean head width of 0.8687 mm, body length of 6.28 mm, and weight of 6.9 mg. Fourth-instar unparasitized pink bollworm measurements were 1.0743 mm, 9.31 mm, and 17.7 mg, respectively.",
keywords = "Biological control, Chelonus sp. nr. curcimaculatus, Parasitoid, Pectinophora gossypiella",
author = "Matthew Hentz and Ellsworth, {Peter C} and Steven Naranjo",
year = "1997",
month = "9",
language = "English (US)",
volume = "90",
pages = "631--639",
journal = "Annals of the Entomological Society of America",
issn = "0013-8746",
publisher = "Entomological Society of America",
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T1 - Biology and morphology of Chelonus sp. nr. curvimaculatus (Hymenoptera

T2 - Braconidae) as a parasitoid of Pectinophora gossypiella (Lepidoptera Gelechiidae)

AU - Hentz, Matthew

AU - Ellsworth, Peter C

AU - Naranjo, Steven

PY - 1997/9

Y1 - 1997/9

N2 - A general description of the life stages of Chelonus sp. nr. curvimaculatus, an egg-larval parasitoid of pink bollworm, Pectinophora gossypiella (Saunders), is presented. Pink bollworms were reared in the laboratory on a wheat germ diet. At 29°C, parasitoid eggs (0.12-0.18 mm) begin to eclose ∼22 h after oviposition. Three instars occur in this species. The 1st instar is endoparasitic and ranged in length from 0.14 mm (neonate) to 1.25 mm (∼9 d old. end of the 1st stadium). The 2nd instar also is endoparasitic and is 1.89-3.04 mm long. This stadium lasts ∼2-3 d. The 3rd instar is an average of 3.82 mm long and is endoparasitic early in its development but becomes ectoparasitic toward the completion of its development. This stadium lasts ∼3 d. The pupal stage lasts ∼6-7 d. Adult parasitoids begin to emerge ∼21 d after oviposition. Parasitized and unparasitized pink bollworm larvae deceloped through 4 stadia. Larval head capsule widths. body lengths, and weights of parasitized pink bollworms are significantly smaller than those of unparasitized larvae during the 3rd and 4th stadia. Parasitized 4th-instar pink bollworms have a mean head width of 0.8687 mm, body length of 6.28 mm, and weight of 6.9 mg. Fourth-instar unparasitized pink bollworm measurements were 1.0743 mm, 9.31 mm, and 17.7 mg, respectively.

AB - A general description of the life stages of Chelonus sp. nr. curvimaculatus, an egg-larval parasitoid of pink bollworm, Pectinophora gossypiella (Saunders), is presented. Pink bollworms were reared in the laboratory on a wheat germ diet. At 29°C, parasitoid eggs (0.12-0.18 mm) begin to eclose ∼22 h after oviposition. Three instars occur in this species. The 1st instar is endoparasitic and ranged in length from 0.14 mm (neonate) to 1.25 mm (∼9 d old. end of the 1st stadium). The 2nd instar also is endoparasitic and is 1.89-3.04 mm long. This stadium lasts ∼2-3 d. The 3rd instar is an average of 3.82 mm long and is endoparasitic early in its development but becomes ectoparasitic toward the completion of its development. This stadium lasts ∼3 d. The pupal stage lasts ∼6-7 d. Adult parasitoids begin to emerge ∼21 d after oviposition. Parasitized and unparasitized pink bollworm larvae deceloped through 4 stadia. Larval head capsule widths. body lengths, and weights of parasitized pink bollworms are significantly smaller than those of unparasitized larvae during the 3rd and 4th stadia. Parasitized 4th-instar pink bollworms have a mean head width of 0.8687 mm, body length of 6.28 mm, and weight of 6.9 mg. Fourth-instar unparasitized pink bollworm measurements were 1.0743 mm, 9.31 mm, and 17.7 mg, respectively.

KW - Biological control

KW - Chelonus sp. nr. curcimaculatus

KW - Parasitoid

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JO - Annals of the Entomological Society of America

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