BIOLOGICAL CHARACTERS OF PREDACEOUS MITE, Typhlodromus pyri SCHOUTEN (ACARI:PHYTOSEIIDAE) AT DIFFERENT TEMPERATURES | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 7, Volume 95, Issue 3, September 2017, Page 1107-1113 PDF (491.5 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2017.149593 | ||||
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| Author | ||||
| MOHAMED EL. MOHAMED | ||||
| Plant Protection Research Institute, ARC, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| iological characters and life table parameters of Typhlodromus pyri was determined at three different temperatures degree. Developmental time of T. pyri differed according to temperature degree. Life cycle was 7.31 days at 30ºC while, it elongated to 11.36 days at 20ºC. Female survival immature% affected with different temperature these values were 79.72, 88.46 and 91.58% at 20, 25 and 30ºC, respectively. Our results indicated that the predator consumed significantly more prey at 30ºC than other degree of temperature. The highest fecundity (36.82 eggs / ♀) at 30ºC while, it decreased to (19.28 eggs / ♀) at 20ºC. The effect of temperature on life table parameters was determined. The mean generation time (T) was decreased when the temperature increased, the net reproductive rate (Ro) value were 9.48, 14.12 and 24.36 times for 20, 25 and 30ºC. The intrinsic rate of increase (rm) was 0.10, 0.17 and 0.21 individual/♀/day for the above same order. | ||||
| Keywords | ||||
| Biological aspects; Typhlodromus pyri; temperatures | ||||
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