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Web URL(s): | http://www.bioone.org/doi/abs/10.1603/0046-225X-32.3.618 Last checked: 03/15/2010 Access conditions: Item is within a limited access website Notes: Abstract http://www.bioone.org/doi/pdf/10.1603/0046-225X-32.3.618 Last checked: 03/15/2010 Requires: PDF Reader Access conditions: Item is within a limited access website |
Publication Type:
| Refereed |
Author(s): | Rogers, M. E.;
Cole, T. J.;
Ramaswamy, S. B.;
Potter, D. A. |
Author Affiliation: | Rogers and Potter: Department of Entomology, University of Kentucky, Lexington, Kentucky; Cole and Ramaswamy, Department of Entomology, Kansas State University, Manhattan, Kansas |
Title: | Behavioral changes in Japanese beetle and masked chafer grubs (Coleoptera: Scarabaeidae) after parasitism by tiphiid wasps (Hymenoptera: Tiphiidae) |
Section: | Behavior Other records with the "Behavior" Section
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Source: | Environmental Entomology. Vol. 32, No. 3, June 2003, p. 618-625. |
Publishing Information: | College Park, MD: Entomological Society of America |
# of Pages: | 8 |
Keywords: | TIC Keywords: Tiphia pygidialis; Tiphia vernalis; Popillia japonica; Cyclocephala; Scarabaeidae; Parasitism; Behavior; Grubs; Case studies
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Abstract/Contents: | "We studied effects of parasitism by two Tiphia species (Hymenoptera: Tiphiidae) on burrowing behavior of their respective scarabaeid hosts and tested the hypothesis that parasitoid alteration of host hormones accounts for the observed behavioral change. In turf field-plots, third-instar masked chafer grubs, Cyclocephala sp., parasitized by native Tiphia pygidialis Allen burrowed to depths of 12-16 cm within 21 d, whereas nonparasitized grubs remained in the upper 4 cm of soil. Grubs bearing an egg or early-instar Tiphia larva were found relatively close to the surface, whereas those with a fourth- or fifth-instar parasitoid were deeper. Experiments in soil-filled, vertical observation chambers confirmed downward movement by parasitized Cyclocephala, and similar response in third-instar Japanese beetle, Popillia japonica Newman, parasitized by Tiphia vernalis Rohwer. Removal of the Tiphia egg from masked chafers was followed by initial downward movement of grubs and then a gradual ascent, suggesting that host behavior is affected both by the venomous sting and feeding by the wasp larva. Significant but inconsistent differences were found in juvenile hormone-III (JH III) titers in hemolymph taken from nonparasitized grubs or grubs parasitized for 1 or 14 d. Topical application of JH III and methoprene acid resulted in grubs moving deeper into the soil, whereas injection of 20-hydroxyecdysone did not affect grub behavior. Failure to dig deeply enough in soil when sampling for parasitized scarab grubs or Tiphia cocoons likely will result in underestimation of parasitism rates." |
Language: | English |
References: | 39 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Rogers, M. E., T. J. Cole, S. B. Ramaswamy, and D. A. Potter. 2003. Behavioral changes in Japanese beetle and masked chafer grubs (Coleoptera: Scarabaeidae) after parasitism by tiphiid wasps (Hymenoptera: Tiphiidae). Environ. Entomol. 32(3):p. 618-625. |
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| Web URL(s): http://www.bioone.org/doi/abs/10.1603/0046-225X-32.3.618 Last checked: 03/15/2010 Access conditions: Item is within a limited access website Notes: Abstract http://www.bioone.org/doi/pdf/10.1603/0046-225X-32.3.618 Last checked: 03/15/2010 Requires: PDF Reader Access conditions: Item is within a limited access website |
| MSU catalog number: SB 599 .E44 |
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