Experimental and Applied Acarology (2003) 31, 79-91

Ismail Kasap (2003)
Life history of hawthorn spider mite Amphitetranychus viennensis (Acarina: Tetranychidae) on various apple cultivars and at different temperatures
Experimental and Applied Acarology 31 (1-2), 79-91
Abstract: Development duration and reproduction rate of hawthorn spider mite Amphitetranychus viennensis (Zacher) were carried out on five different apple cultivars (Amasya (local cultivar), Golden Delicious, Granny Smith, Starking Delicious and Starkrimson Delicious) at 25 °C, 65 ± 10 % RH and 16:8 L:D. In addition, the same parameters were determined on Golden Delicious leaves at three constant temperatures (20, 30 and 35 °C, 65 ± 10% RH and 16:8 L:D) in the laboratory. A. viennensis showed a better performance on Golden Delicious than on the other apple cultivars. This was mainly due to a short development time (10.7 days), high daily egg production (5.2 eggs/[female]/day) and early reproduction peak. The highest intrinsic rate of natural increase (rm) was determined on the variety Golden Delicious (rm = 0.247/day), while the lowest one was observed on the variety Starking Delicious (rm = 0.215/day). The developmental periods of A. viennensis varied from 7.4 to 18.8 days at 35 and 20 °C for females, while it varied from 7.9 to 17.2 days at 30 and 20 °C for males. The development threshold of the eggs and pre-adult stages were 9.72 and 9.07 °C, total effective temperature was 72.99 and 185.18 degree-days, respectively. The mean generation time (To) of the population ranged from 16.13 days at 30 °C to 29.15 days at 20 °C. The net reproductive rate (R0) increased from 54.33 [female]/[female] at 20 °C to 78.34 [female]/[female] at 25 °C, and decreased to 75.71 [female]/[female] at 30 °C. The highest intrinsic rate of increase (rm) was reached at 30 °C (rm = 0.268/day), the lowest one at 20 °C (rm = 0.136/day).
(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): Ismail Kasap

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Amphitetranychus viennensis	Apple (Malus)	Turkey