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Article

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

1
College of Agriculture and Food Science, Zhejiang A&F University, Hangzhou 311300, China
2
College of Plant Protection, Northwest A&F University, Yangling 712100, China
3
College of Economic and Management, Zhejiang A&F University, Hangzhou 311300, China
4
Fengdong New City Administration for Market Regulation, Xi’an 710086, China
5
College of Plant Protection, Shanxi Agricultural University, Taigu 030801, China
*
Author to whom correspondence should be addressed.
Insects 2020, 11(8), 475; https://doi.org/10.3390/insects11080475
Received: 3 July 2020 / Revised: 20 July 2020 / Accepted: 23 July 2020 / Published: 27 July 2020
(This article belongs to the Special Issue Improving IPM of Specialty Crop Pests and Global Food Security)
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. View Full-Text
Keywords: biological control; green peach aphid; chili pepper; leaf disc; life table biological control; green peach aphid; chili pepper; leaf disc; life table
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MDPI and ACS Style

Wang, S.Y.; Wang, B.L.; Yan, G.L.; Liu, Y.H.; Zhang, D.Y.; Liu, T.X. 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. Insects 2020, 11, 475. https://doi.org/10.3390/insects11080475

AMA Style

Wang SY, Wang BL, Yan GL, Liu YH, Zhang DY, Liu TX. 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. Insects. 2020; 11(8):475. https://doi.org/10.3390/insects11080475

Chicago/Turabian Style

Wang, Sheng Y., Bo L. Wang, Gai L. Yan, Yan H. Liu, Da Y. Zhang, and Tong X. Liu 2020. "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" Insects 11, no. 8: 475. https://doi.org/10.3390/insects11080475

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