ORIGINAL ARTICLE
Effects of biological and environmental factors on sex ratio in Ascogaster quadridentata Wesmael (Hymenoptera: Braconidae), a parasitoid of Cydia pomonella L. (Torticidae)
 
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1
Department of Agriculture, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria
2
Faculty of Agriculture, Tishreen University, Lattakia, Syria
CORRESPONDING AUTHOR
Fater Mohamad
Department of Agriculture, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria
Submission date: 2014-01-09
Acceptance date: 2015-04-07
 
Journal of Plant Protection Research 2015;55(2):151–155
KEYWORDS
TOPICS
ABSTRACT
The sex ratio in the natural population of most Hymenopteran parasitoids is 1 : 1. Females of these parasitoids, however, can regulate the sex of their offspring in response to environmental and biological factors. Under certain circumstances, this may lead to an overproduction of males, which can result in a very negative impact on any control program using these parasitoids. For these reasons, understanding the effect of these factors is very important. In this study, five biological and environmental factors known to affect sex ratio in parasitic Hymenoptera were investigated for Ascogaster quadridentata Wesmael, a parasitoid of Cydia pomonella L. Results showed that food, ambient temperature, and parasitoid age had significant effects on the sex ratio of the offspring of Hymenopteran parasitoids. The percentage of females decreased with lack of food, parasitoid age (when it became 10-days-old or older), and at low (15°C) and high (35°C) temperatures. The effect of host age and density, however, was not significant.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
REFERENCES (26)
1.
Biswas S., Singh R. 1998. Interrelationship between host density, temperature, offspring, sex ratio and intrinsic rate of natural increase of the aphid parasitoid Lysiphlebia mirzai(Hym: Braconidae) reared on resistant and susceptible food plant cultivars. Entomologia Generalis 22 (3–4): 239–249.
 
2.
Bogdanovic A.I., Ivanovic A., Tomanovic Z., Zikic V., Stary P., Kavallieratos G. 2009. Sexual dimorphism in Ephedrus persicae(Hymenoptera: Braconidae: Aphidiinae): intraspecific variation in size and hape. The Canadian Entomologist 141 (6): 550–560.
 
3.
Brunner J.F. 1993. Ascogaster quadridentataWesmael (Hymenoptera:Braconidae). Orchard Pest Management Online. http://jenny.tfrec.wsu.edu/opm.... [Accessed: December 20, 2014].
 
4.
Charmillot P.J., Pasquier D., Dorsal L., Keimer C., Herminjard P., Olivier R., Zuber M. 1997. Mating disruption of codling moth, Cydia pomonella L. with Isomate-C plus distributors in Switzerland in 1996. Revue Suisse de Viticulture, d’Arboriculture et d’Horticulture 29 (2): 91–96.
 
5.
Charnov E.L., Hartogh L., Jones R.L., Assem V. 1981. Sex ratioevolution in variable environment. Nature 289 (5793): 27–33.
 
6.
Damiens D., Bressac C., Chevrier C. 2003. The effect of age on sperm stock and egg laying inthe parasitoid wasp, Dinarmus basalis. Journal of Insect Science 3 (1): 22.
 
7.
Fuester R.W., Dunning K.S., Taylor P., Ramaseshiah G. 2003. Malebiased sex ratio in Glyptapanteles flavicoxis(Hymenoptera: Braconidae), aparasitoid of gypsy moth (Lepidoptera: Ly-mantriidae). Annals of Entomological Society of America 96 (4): 553–559.
 
8.
Garcia-Medel D., Sivinski J., Diaz-Fleischfr F., Ramirez-Romero R.M., Aluja M. 2007. Foraging behavior by six fruit fly parasitoids (Hymenoptera:Braconidae) released as single or multiple-species cohorts in field cages: Influence of fruit location and host density. Biological Control 43 (1): 12–22.
 
9.
Godfray H.C.J. 1994. Parasitoids Behavioral and Evolutionary Ecological.Princeton University Press, Princeton, USA, 473 pp.
 
10.
Gunduz E.A., Gulel A. 2005. Investigation of fecundity and sex ratio in the parasitoid Bracon hebetorSay (Hymenoptera: Braconidae) in relation to parasitoid age. Turkish Journal of Zoology 29 (4): 291–294.
 
11.
Hagley E.A.C., Barber D.R. 1992. Effect of food sources on the longevity, fecundity and sex ratio of Pholetesor ornigisWeed (Hymenoptera:Pteromalidae). The Canadian Entomologist 124 (4): 341–346.
 
12.
Harl D.L., Brown S.W. 1970. The origin of male haploid genetic systems and their expected sex ratio. Theoretical Population of Biology 1 (2): 165–190.
 
13.
Howell J.F. 1981. Codling moth: The effect of adult diet on longev-ity, fertility and mating. Journal of Economic Entomology 74 (1): 13–18.
 
14.
Jalali S.K., Singh S.P., Ballal C.R., Kumar P. 1990. Response of Cotesia marginiventris Cresson (Hymenoptera: Braconidae) to low temperature in relation to its biotic potential. Entomology 15 (3–4): 217–220.
 
15.
Jarosik V., Holy I., Lapchin L., Haveika J. 2003. Sex ratio in the aphid parasitoid Aphidius colemani(Hymenoptera: Braconidae) in relation to host size. Bulletin of Entomological Research 39 (3): 255–258.
 
16.
Kfir R., Luck R.F. 1979. Effect of constant and variable temperature extremes on sex ratio and progeny production by Aphytis melinus and A. lingnanensis(Hymenoptera: Aphelinidae). Ecological Entomology 4 (4): 335–344.
 
17.
King B.H. 1993. Sex ratio manipulation by parasitoid wasps. p. 418–441. In: “Evolution and Diversity of Sex Ratio in Insects and Mites” (D.L. Wrensch, M.A. Ebbert, eds.). Chapman & Hall, New York, USA, 634 pp.
 
18.
Mansour M., Mohamad F. 2004. Effects of gamma radiation on codling moth, Cydia pomonella(L.), eggs. Radiation Physics and Chemistry 71 (6): 125–128.
 
19.
Medeiros R.S., Ramalho F.S., Lemos W.P., Zanuncio J.C. 2006. Age-dependent fecundity and life-fertility tables for Podisus nigrispinus(Dallas) (Het., Pentatomidae). Annals of Entomological Society of America 99 (2): 401–407.
 
20.
Owen R.E. 1983. Sex ratio adjustment in Asobara persimilis (Hymenoptera: Braconidae), a parasitoid of Drosophila. Oecologia 59 (2–3): 402–404.
 
21.
Proverbs M.D., Logan D.M. 1970. A rotating oviposition cage for the codling moth Carpocapsa pomonella. The Canadian Entomologist 102 (1): 42–49.
 
22.
Shuker D.M., Pen I., West S.A. 2006. Sex ratio under asymmetrical local mate competition in the parasitoid wasp Nasonia vitripennis. Behavior Ecology 17 (3): 345–325.
 
23.
Uckan F., Gulel A. 2002. Age-related fecundity and sex ratio variation in Apanteles galleriae(Hymenoptera: Braconidae) and host effect on fecundity and sex ratio of its hyperparasitoid Dibrachys boarmiae(Hymenoptera: Pteromalidae). Journal of Applied Entomology 126 (10): 534–537.
 
24.
Werren J.H. 1980. Sex ratio adaptation to local mate competition in aparasitic wasp. Science 208 (4448): 1157–1159.
 
25.
Werren J.H. 1987. Labile sex ratio in wasps and bees. Bioscience 37 (7): 498–506.
 
26.
Yu S.H., Ryoo M.I., Na J.H., Choi W.I. 2003. Effect of host density on egg dispersion and the sex ratio of progeny of Bracon hebetor(Hymenoptera: Braconidae). Journal of Stored Products Research 39 (4): 385–393.
 
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