Abstract
Are Neoseiulus californicus (McGregor) and Neoseiulus fallacis (Garman) both specialized predators of spider mites? As part of a series of studies made to answer this question, responses by larvae were assessed in treatments either with or without prey (Tetranychus urticae Koch) and with either moderate or high relative humidities (a factor that may distinguish between these two morphologically similar species). Neoseiulus fallacis larvae had more feeding, ambulatory activity and jerking (intra– or interspecific communication) in all treatments than N. californicus. The percent egg hatch was less and development took longer for N. fallacis larvae than for N. californicus larvae without prey at moderate humidity levels. The nymphs of both mites showed similar drives to feed 1–2>h after being held 12–48 h without food and then given eggs of T. urticae. Neoseiulus californicus nymphs fed more on the eggs of either phytoseiid and thereafter became adults than did N. fallacis nymphs. These data indicate that N. californicus may be a less specialized predator of spider mites than is N. fallacis.
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REFERENCES
Castagnoli, M. and Simoni, S. 1994. The effect of different constant humidities on eggs and larvae of Amblyseius californicus (McGregor) (Acari: Phytoseiidae). Redia 77: 349–359.
Coop, L. B. and Croft, B. A. 1995. Neoseiulus fallacis: dispersal and biological control of Tetranychus urticae following minimal inoculations into a strawberry field. Exp. Appl. Acarol. 19: 31–43.
Croft, B. A. and Croft, M. B. 1993. Larval survival and feeding by immature Metaseiulus occidentalis, Neoseiulus fallacis, Amblysieus andersoni and Typhlodromus pyri (Acari: Phytoseiidae) on life stages of Tetranychus urticae Koch and phytoseiid larvae. Exp. Appl. Acarol. 17: 685–693.
Croft, B. A. and Croft, M. B. 1996. Intra-and interspecific prediation among adult female Metaseiulus occidentalis, Typhlodromus pyri, Neoseiulus fallacis and Amblyseius andersoni. Environ. Entomol. 25: 853–858.
Croft, B. A. and Zhang, Z. Q. 1994. Walking, feeding and interaction of larvae of Metaseiulus occidentalis, Typhlodromus pyri, Neoseiulus fallacis and Amblyseius andersoni held with and without eggs of Tetranychus urticae. Exp. Appl. Acarol. 18: 567–580.
Croft, B. A. and Zhang, Z. Q. 1997. Assessing roles of individual species in a phytoseiid complex using adult female and immature traits: relevance to biological control. Proc. Int. Cong. Acarol. in press.
Croft, B. A., Dunley, J. E., Messing, R. H. and Strong W.B. 1993. Humidity effects on eggs and immatures of Neoseiulus fallacis, Amblyseius andersoni, Metaseiulus occidentalis and Typhlodromus pyri: implications for biological control of apple caneberry, strawberry and hop. Exp. Appl. Acarol. 17: 451–459.
Croft, B. A., Kim, S. S., and Kim, D. I. 1996. Intra-and interspecific predation on four life stage groups by adult females of Metaseiulus occidentalis, Typhlodromus pyri, Neoseiulus fallacis and Amblyseius andersoni. Exp. Appl. Acarol. 20: 435–444.
Hadam, J. J., AliNiazee, M. T. and Croft, B. A. 1986. Phytoseiid mites of major crops in the Willamette Valley, OR and pesticide resistance in Typhlodromus pyri Scheulten. Environ. Entomol. 15: 1255–1262.
McMurtry, J. A. and Croft, B. A. 1997. Life styles of phytoseiid mites and their roles as biological control agents. Ann. Rev. Entomol. 42: 291–321.
Monetti, L. and Croft, B. A. 1997. Mating, cross-mating and related behaviors of Neoseiulus californicus and N. fallacis (Acari: Phytoseiidae). Exp. Appl. Acarol. 21: 67–71.
Morris, M. A., Croft, B. A. and Berry, R. E. 1996. Over-wintering and effects of autumn habitat manipulations and carbofuran on Neoseiulus fallacis and Tetranychus urticae in peppermint. Exp. Appl. Acarol. 20: 249–257.
Petersen, R. G. 1985. Design and Analysis of Experiments. Marcel Dekker Inc., New York.
Pratt, P. 1997. Intra-and interplant dispersal by Neoseiulus californicus and N. fallacis when feeding on Tetranychus urticae in bean plant-controlled environment systems. MS thesis, Oregon State University, 19 pp.
Strong, W. B. and Croft, B. A. 1995. Inoculative release of phytoseiid mites into the rapidly expanding canopy of hop for control of Tetranychus urticae Koch. Environ. Entomol. 24: 446–453.
Strong, W. B. and Croft, B. A. 1996. Release strategies and cultural modifications for biological control of Tetranychus urticae by Neoseiulus fallacis (Acari: Phytsoeiidae, Tetranychidae) on hops. Environ. Entomol. 25: 529–535.
Zhang, Z.-Q. and Croft, B. A. 1994. A comparative life history study of immature Amblyseius fallacis, Amblyseius andersoni, Metaseiulus occidentalis, and Typhlodromus pyri (Acari: Phytoseiidae) with a review of larval feeding patterns in the family. Exp. Appl. Acarol. 18: 635–657.
Zhang, Z.-Q. and Croft, B. A. 1995a. Intraspecific competition in immature Amblyseius fallacis, Amblyseius andersoni, Typhlodromus occidentalis and Typhlodromus pyri (Acari: Phytoseiidae). Exp. Appl. Acarol. 19: 65–77.
Zhang, Z.-Q. and Croft, B. A. 1995b. Interspecific competition and predation between immature Amblyseius fallacis, Amblyseius andersoni, Typhlodromus occidentalis and Typhlodromus pyri (Acari: Phytoseiidae). Exp. Appl. Acarol. 19: 247–257.
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Monetti, L.N., Croft, B.A. Neoseiulus californicus (McGregor) and Neoseiulus fallacis (Garman): larval responsesto prey and humidity, nymphal feeding drive and nymphal predation on phytoseiid eggs. Exp Appl Acarol 21, 225–234 (1997). https://doi.org/10.1023/A:1018442820736
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DOI: https://doi.org/10.1023/A:1018442820736