- Effect of temperature and photoperiod on development, fecundity, progeny sex ratio and life-table of an aphid parasitoid Binodoxys indicus
- 作者: Singh, R.; Pandey, S. and Singh, A
- literature id: 42651
- catalog nub: TPL_SINGHn2000EOTAP79009300
- 文献库: Taxapad收录文献
- type: article
- publication name: Malaysian Applied Biology
- publish date: 2000-12-01
- pages: 79-93
- volume: 29
- issue: 1-2
- 创建时间: 2021-03-02 15:00:32
- create by: zxmlmq (admin)
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comment:
Exposure to different temperatures (7, 12, 17, 22, 27, 32, or 37[degree]C) during the entire life-span of female Binodoxys indicus (Subba Rao and Sharma) (Hym.: Braconidae) variously affected its pupal and adult survival, developmental rate, fecundity rates, progeny sex ratio and parameters of age-specific life-table. The parasitoid develops much faster at 32[degree]C than 12[degree]C. Lower threshold temperature for the development (tL) was 2.84[degree]C and predicted time-to-adult 330.2 D[degree] days. The female did not produce any progeny at 7[degree]C. Maximum pupal mortality (67.9%) occurred at 37[degree]C. The adult survival decreased with increase of temperature from 20.1 days at 12[degree]C to 1.4 days at 37[degree]C. The female produced 234.4[plus/minus]18.7 SD progeny at 22[degree]C of which 161.2[plus/minus]17.6 SD were females and these numbers decreased both below and above this temperature. All life-table parameters were temperature dependent; intrinsic rates of natural increase (rm) were 0.3139, 0.3265 and 0.2936 at 22, 27 and 32[degree]C, respectively. The progeny sex ratio was female-biased below 27[degree]C while no female birth was yielded at 37[degree]C. Experiments related with cold storage of mummies demonstrated that the parasitoid inside it can be stored at least for 4 weeks with about 60% adult eclosion and female-biased sex ratio. Variations in photoperiod only significantly influence the progeny sex ratio; shorter photoperiod (less than 12 h) increases the production of male progenies. Since little variation on most of the required attributes of B. indicus was noticed within the range of 17[degree]C-27[degree]C, it appears that the parasitoid is adapted to a wide range of temperatures. Based on developmental periods, lower temperature threshold, pupal survival, adult longevity, fecundity rates, progeny sex ratio and parameters of age-specific life-table, we suggest that the parasitoid be reared in laboratory at 22[degree]C and be released in fields in the cooler months (from mid December to mid March) in north India. none
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