A laboratory and field condition comparison of life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae)

Abstract

Life table studies are essential tools for understanding population dynamics. The life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae) feeding on the host plant, Hibiscus syriacus L. were studied under laboratory (25±1°C and relative humidity of 65±5% and a photoperiod of 16L : 8D h) and field conditions (23-43°C, and relative humidity of 27-95%). The data were analysed using the age-stage, two-sex life table theory. The life table studies were started with 50 and 40 nymphs in laboratory and field conditions, respectively. Under laboratory conditions, A. gossypii reared on H. syriacus had a higher survival rate, fecundity, and longevity than those reared under field conditions. When reared under field conditions, A. gossypii had a longer nymphal developmental time, shorter adult longevity, and lower fecundity than those reared under laboratory conditions. The intrinsic rate of increase (r), net reproductive rate (R 0 ), and the finite rate of increase (λ) under laboratory conditions, were higher than those obtained under field conditions. Nevertheless, there were no significant differences in the mean generation time T (days) between field and laboratory conditions. In the present study, the results clearly showed that life table parameters of A. gossypii were significantly different under field and laboratory conditions. These results could help us to understand the A. gossypii population dynamics under field conditions. The results could also help us make better management decisions for economically important crops.

Identification and life history of aphids associated with chili pepper crops in southwestern Colombia

“…Population parameters needed to create life tables for aphids are highly influenced by the host plant [34,14] and by the environmental temperature [31]. In fact, the Capsicum r m values found in our study are in the range reported by other authors.…”

“…One way to measure the potential population growth of an aphid species is via life tables. These constitute crucial tools to comprehend population dynamics, estimate the insects' potential and reproductive growth parameters [14], which, in turn, influence how aphid-borne viruses spread [15].…”

Effect of sublethal doses of abamectin on demographic traits of tomato leafminer Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae)

“…To identify this, more research in field and laboratory is needed. Hosseini--Tabesh et al (2015) showed that life table parameters of A. gossypii were significantly different under field and laboratory conditions. In summary, the present results suggest that abamectin has an effective role on larval stages of the T. absoluta.…”

Resistance and tolerance of ten carrot cultivars to the hawthorn-carrot aphid, Dysaphis crataegi Kalt., in Poland

“…These parameters define the potential for the population growth of an insect pest in the current and following generation. Life table parameters, particularly the intrinsic rate of increase, are the most important parameters that can be used to assess a plant’s level of resistance (antibiosis) to insects [ 16 , 81 , 82 ]. In our experiments, the fecundity, reproductive period, intrinsic rate of population growth and net reproductive rate were significantly lower for the resistant cultivars, Nipomo F 1 and Afro F 1 in comparison to the highly susceptible cultivar, White Satin F 1 .…”