Effects of high and fluctuating temperatures on Myzus persicae (Hemiptera: Aphididae)

Document Type

Article

Publication Date

12-1-2006

Abstract

Development of green peach aphid, Myzns persicae (Sulzer), was modeled under high and fluctuating temperatures to determine what effects an increase in mean summer temperatures of 2.5-3.5°C would have on green peach aphid populations in Minnesota and North Dakota. Green peach aphid developed faster and had greater fecundity under fluctuating conditions. The constant tem-perature model failed to predict observed development under fluctuating temperatures (R2 = 0.01). Optimal temperature for green peach aphid population growth was 26.7°C. The lower and upper developmental thresholds were 6.5 and 37.3°C, respectively. Under optimal conditions, intrinsic rate of increase was 0.356, and population doubling time was 1.95 d. At optimal fluctuating temperature conditions, one female aphid produced 12.2 progeny each week while under the most favorable constant temperature conditions; each female aphid produced only 5.9 progeny. Green peach aphid was able to survive 1 h each day above its calculated lethal death point of 38.5°C. It seems that, in midwestem North America, green peach aphid would benefit from an increase in mean summer temperature (20°C) of 2.5-3.5°C. © 2006 Entomological Society of America.

Publication Source (Journal or Book title)

Environmental Entomology

First Page

1461

Last Page

1468

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