The Effect of Temperatures on the Biological Characteristics of Two Aphid Parasitoids Aphelinus asychis (Walker) and Aphelinus varipes (Förster) (Hymenoptera: Aphelinidae) on Two Aphid Hosts

Kang, Eun Jin; Byeon, Young-Woong; Kim, Jeong‐Hwan; Choi, Man-Young; Choi, Yong Suk

doi:10.5656/ksae.2012.09.0.010

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…For instance, the highest portion of females on Diaeretiella rapae was 70% at 7.2 • C, and the lowest was 50% at 29.4 • C [59]. Kang et al reported that the percentages of female adults were 71.7%, 65.0%, and 78.8% at 20, 25, and 30 • C, respectively [56]. This was similar to our results.…”

Section: Discussionsupporting

confidence: 91%

“…Additionally, the developmental times of the A. asychis female and male from the egg to the adult stage and parasitization of A. gossypii at 25 • C were 13.9 and 13.2 d, respectively [55]. When it parasitized A. gossypii at 20, 25, and 30 • C, the developmental times were 20.6, 14.2, and 13.0 d respectively [56]. Differences among these parameters may be attributed to the temperature, host species, and host stage.…”

Section: Discussionmentioning

confidence: 98%

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Temperature-Dependent Demographic Characteristics and Control Potential of Aphelinus asychis Reared from Sitobion avenae as a Biological Control Agent for Myzus persicae on Chili Peppers

Wang

Yan³

et al. 2020

Insects

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Aphelinus asychis, a polyphagous parasitoid, has been widely used as an efficient biological control agent against the aphid Myzus persicae. Aiming to evaluate the influence of temperature on the biological characteristics and control potential of A. asychis for M. persicae, we compared the life table parameters and control potential of A. asychis, which included the developmental time, longevity, fecundity, intrinsic rate of increase (r), and finite killing rate (θ). The results showed that increasing the temperature significantly decreased the developmental time and longevity of A. asychis. The r at 24 (0.2360 d−1) and 28 °C (0.2441 d−1) were significantly greater than those at 20 (0.1848 d−1) and 32 °C (0.1676 d−1). The θ at 24 (0.4495), 28 (0.5414), and 32 °C (0.4312) were also significantly greater than that at 20 °C (0.3140). The relationship between population fitness (r and θ) and temperature followed a unary quadratic function (R2 > 0.95). The temperatures for the expected maximum intrinsic rate of increase (rmax) and the maximum finite killing rate (θmax) were 25.7 and 27.4 °C, respectively. In conclusion, A. asychis could develop and produce progenies within the temperature range of 20–32 °C, and its control efficiency for M. persicae at 24, 28, and 32 °C was greater than that at 20 °C. The most suitable temperature range for controlling M. persicae with A. asychis in the field might be between 25.7 and 27.4 °C.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 98%

Temperature-Dependent Demographic Characteristics and Control Potential of Aphelinus asychis Reared from Sitobion avenae as a Biological Control Agent for Myzus persicae on Chili Peppers

Wang

Yan³

et al. 2020

Insects

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“…A preference for parasitizing some species over others has also been found in the genus Aphelinus (Kang et al 2012). For example, Prinsloo (2000) found that Aphelinus sp.…”

Section: Host Species Suitabilitymentioning

confidence: 86%

Host species suitability and instar preference of Aphidius ervi and Aphelinus abdominalis

Velasco-Hernández¹,

Desneux²,

Ramírez‐Martínez³

et al. 2017

entomologia

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Parasitism rates and parasitoid development can be influenced by the species and developmental stage of the host, both of these factors can influence parasitoid performance and fitness. In this study, parasitism rates and developmental parameters were assessed for two widely distributed and commercially available species of aphid parasitoid: Aphidius ervi (Hymenoptera: Braconidae) and Aphelinus abdominalis (Hymenoptera: Aphelinidae). In a first bioassay, parasitism rates and parasitoid development were investigated in different host species. The wasp A. ervi was tested on Macrosiphum euphorbiae, Rhopalosiphum padi, and Myzus persicae (Hemiptera: Aphididae) and A. abdominalis was tested on M. persicae, R. padi, and Rhopalosiphum maidis (Hemiptera: Aphididae). The results indicated that A. ervi had a greater percentage of emergence, higher percentage of parasitized aphids, longer developmental time, and higher proportion of females in M. persicae than in the other hosts. A. abdominalis had a greater percentage of emergence, larger progeny, and shorter developmental time in R. padi than in the other hosts. A second bioassay evaluated the preference of the parasitoids for different instars of their respective optimum host aphids in terms of parasitism and development, as determined in the first bioassay. The results showed that A. ervi produced a greater number of mummies in the fourth instar and in adults of M. persicae. In contrast, A. abdominalis preferred the first instar of R. padi. In conclusion, our results indicate that both parasitoid species exhibit different parasitism parameters depending upon the host species and the host stage. This suggests that these parasitoid species could be potentially complementary on multiple or combined releases of biological control programs. 348 M.C. Velasco-Hernández et al.

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“…The developmental time of A. asychis was significantly longer in the backcross treatment than that in the control, which suggested that the backcross might extend the developmental time of parasitoids. Some previous studies indicated that temperature, host species, and host age and size affect host suitability of A. asychis, especially developmental time [1,[41][42][43]. Besides the host, the parasitoid strain can also affect the developmental time [44,45].…”

Section: Discussionmentioning

confidence: 99%

Multiple Mating of Aphelinus asychis Enhance the Number of Female Progeny but Shorten the Longevity

Wang

Liu

et al. 2021

Insects

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The Aphelinus asychis female adult is an important arrhenotocous parthenogenesis parasitoid of Myzus persicae, and its reproductive mode is beneficial for the population continuation of A. asychis by way of multiple mating and backcross. To explore the effect of mating on the population fitness and control efficiency of A. asychis, its mating frequency and backcross were observed under laboratory conditions. The results showed that most matings in A. asychis involved four distinct stages: courtship, pre-copulatory, copulation, and post-copulatory behaviours. Only the duration of courtship increased significantly with an increase in copulation frequency for females, and the courtship duration of A. asychis females mated with different males were significantly shorter than those mated with the same male at the same mating times, which suggested that A. asychis females might prefer to mate with different males to enrich the genotype of their offspring. The total number of mummified aphids and the female and male longevity decreased significantly with an increase in mating frequency. On the contrary, female progenies increased significantly with an increase of mating frequency, suggesting that sperm limitation might occur in females when they only mated once. These results imply that females might prefer to receive more sperm by mating multiple times in their life span. In addition, we found that the intrinsic rate of increase (r) of A. asychis of the control group (0.2858 d−1) was significantly greater than that in the backcross treatment (0.2687 d−1). The finite killing rate (θ) of A. asychis of the control group was similar to that in the backcross treatment, which showed that this treatment had a negligible negative effect on the control efficiency of A. asychis. In conclusion, the results showed that multiple mating increased the number and proportion of A. asychis female progenies but shortened the longevity of female and male adults, while the negative effect of backcross on the control efficiency of A. asychis was negligible.

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The Effect of Temperatures on the Biological Characteristics of Two Aphid Parasitoids Aphelinus asychis (Walker) and Aphelinus varipes (Förster) (Hymenoptera: Aphelinidae) on Two Aphid Hosts

Cited by 6 publications

References 23 publications

Temperature-Dependent Demographic Characteristics and Control Potential of Aphelinus asychis Reared from Sitobion avenae as a Biological Control Agent for Myzus persicae on Chili Peppers

Temperature-Dependent Demographic Characteristics and Control Potential of Aphelinus asychis Reared from Sitobion avenae as a Biological Control Agent for Myzus persicae on Chili Peppers

Host species suitability and instar preference of Aphidius ervi and Aphelinus abdominalis

Multiple Mating of Aphelinus asychis Enhance the Number of Female Progeny but Shorten the Longevity

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