Multiple Effects of Host Density on Egg Density and the Sex Ratio of Progeny of Bracon hebetor (Say.) (Hymenoptera: Braconidae)

被引:0
作者
Jamil, Anam [1 ]
ul Abdin, Zain [1 ]
Arshad, Muhammad [1 ]
Falabella, Patrizia [3 ]
Abbas, Saqi Kosar [1 ]
Tahir, Muhammad [1 ]
Jamil, Amer [2 ]
Manzoor, Atif [1 ]
Shaina, Hoor [1 ]
机构
[1] Univ Agr Faisalabad, Dept Entomol, Faisalabad 38040, Pakistan
[2] Univ Agr Faisalabad, Dept Biochem, Faisalabad 38040, Pakistan
[3] Univ Basilicata, Dept Sci, I-85100 Potenza, Italy
关键词
Egg density; sex ratio; adult emergence; egg hatching; host density;
D O I
暂无
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Insect parasitoid optimises their reproductive potential by exploiting host immune system, varying clutch size and progeny sex ratio with reference to the host density. Egg density and the progeny sex ratio of Bracon hebetor Say (Hymenoptera: Braconidae) was studied in relation to the larval density of its host Galleria mellonella (Lepidoptera: Pyralidae). Our findings revealed that parasitoid's egg density increased with the increase in host density. A comparison was made between egg laying and egg hatching on different host densities and maximum number of egg laying was observed (134.7 eggs) at the highest host densities (16 larvae) while a minimum number of egg laying (15.6 eggs) was registered at lowest. host density (one larvae). The egg hatching was decreased due to crowding of eggs laid on host's larvae and the percentage of adult emergence was also decreased with the increase in crowding of eggs on host's larvae. It was observed that progeny sex ratio (male/total) increased with the increase in host density. Further dispersion pattern of parasitoid eggs on different host densities were estimated by the Green index. This study has generated novel information on egg laying, egg dispersion and sex ratio of B. hebetor which may lead to the development of sustainable biocontrol programs for lepidopteron insect pests.
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页码:455 / 460
页数:6
相关论文
共 31 条
  • [1] Atif Manzoor Atif Manzoor, 2011, Pakistan Entomologist, V33, P125
  • [2] CHARNOV E L, 1982
  • [3] Desai V. S., 2007, Journal of Plantation Crops, V35, P188
  • [4] Host castration by Aphidius ervi venom proteins
    Digilio, MC
    Isidoro, N
    Tremblay, E
    Pennacchio, F
    [J]. JOURNAL OF INSECT PHYSIOLOGY, 2000, 46 (06) : 1041 - 1050
  • [5] THE BIOLOGY OF PARASITIC HYMENOPTERA
    DOUTT, RL
    [J]. ANNUAL REVIEW OF ENTOMOLOGY, 1959, 4 : 161 - 182
  • [6] ELIPOULUS P. A., 2008, J ECON ENTOMOL, V101, P982
  • [7] Fagundes G. G., 2005, Revista de Agricultura (Piracicaba), V80, P12
  • [8] Frank S. A., 2002, EVOLUTION, V56, P2561
  • [9] Godfray H.C.J., 1994, pi
  • [10] PRECISE SEX-RATIOS IN HIGHLY INBRED PARASITIC WASPS
    GREEN, RF
    GORDH, G
    HAWKINS, BA
    [J]. AMERICAN NATURALIST, 1982, 120 (05) : 653 - 665