Ecological Entomology (2020) 45, 269-277

Xiong Peng, Qi Zhao, Xin Guo, Sha Su, Lang Liu, Yuting Li, Chunman Song and Maohua Chen (2020)
Effects of variable maternal temperature on offspring development and reproduction of Rhopalosiphum padi, a serious global pest of wheat
Ecological Entomology 45 (2), 269-277
Abstract: - Global warming is occurring at an unprecedented rate. Information about how variable temperature affects insect life-history traits is still scarce.
- The current study first evaluated the effects of two variable-temperature treatments [high-temperature-variation (HT) treatments and mild-temperature-variation (MT) treatments] on the life-history traits of a maternal generation (F₀) of Rhopalosiphum padi, a serious global pest, using a constant normal-temperature (NT) treatment as a control. Following this, the life-history traits of the offspring generation (F₁) under the NT, MT and HT scenarios were analysed.
- The total developmental duration of the aphid F₀ generation was significantly shortened by MT treatments, while it was significantly increased by HT treatments. Adult longevity and the fecundity of F₀ were significantly decreased by HT treatments compared with those in the MT and NT treatments, whereas no significant difference was found between the latter two treatments. The HT treatments applied to the F₀ generation significantly prolonged the total developmental duration of the F₁ generation. The offspring adult longevity was not affected by the mothers' temperature experience. The offspring fecundity was significantly increased when the F₀ generation experienced MT treatments. The intrinsic rate of increase (r_m) was significantly decreased when the F₀ generation experienced an HT scenario. However, the MT scenario experienced by the F₀ generation did not significantly affect the r_m of their offspring.
- The results will provide new insights into the effects of variable maternal temperature on the individual development and population dynamics of offspring under a global warming scenario.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mao-Hua Chen

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhopalosiphum padi	Wheat (Triticum)