Formosan Entomologist (2003) 23, 209-224

Yu-Chang Liu, Tang-Yun Chiang and Mei-Hwa Kuo (2003)
[Effect of starvation on population development and population parameters of Periphyllus koelreuteriae (Takahashi) (Homoptera: Chaitophoridae)]
Formosan Entomologist 23 (3), 209-224
Abstract: Experiments were conducted to investigate the effects of brief spells of starvation or consecutive daily brief spells of starvation on the longevity and fecundity of adults, and the survival rate as well as the proportion of alate progeny of the goldenrain tree aphid, Periphyllus koelreuteriae (Takahashi). The longevity of adults, which ranged from 8.5 to 12 days, was not significantly affected by starvation treatments. Yet, fecundity was reduced by starvation for over 36 hours, with the highest fecundity of 33.0 offspring/female with 24-hour starvation and the lowest of 15.7 offspring/ female with 72-hour starvation. The survival rate of progeny was also reduced by starvation, and 72-hour starvation resulted in the lowest survival of 41.8%, in contrast to the 93.7% survival of control aphids. Alate progeny were recorded only with 24- and 48-hour starvation treatments, and the peak appearance of alate progenies was observed for 3-day-old adult aphids. The longevity and fecundity of adults and the survival rate of progeny were reduced by on increasing duration of the daily starvation period and reached the lowest with respective values of 4.9 days, 11.2 offspring/female, and 66.5% with 20-hour daily starvation. Adults starved for 4, 12, 16, and 20 hours daily produced alate progeny, with 2-day-old adults having the highest percentage. Starvation treatments resulted in an early decline in the age-specific survivorship (l_x) of adults, an early appearance of 50% natural mortality time and top fecundity (m_x), as well as a reduction in population parameters, e.g., r, R₀, t, and lambda. The population could still grow even when adults were continuously starved daily for 20 or 72 hours.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Mei Hwa Kuo

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Periphyllus koelreuteriae		Taiwan