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NAWAR, M., ZAHER, M., EL-ENANY, M., IBRAHIM, A. (2001). EFFECT OF SOME BIOTIC AND ABIOTIC FACTORS ON THE BIOLOGY OF TYPHLODROMUS ATHIASAE (ACARI: PHYTOSEIIDAE). Egyptian Journal of Agricultural Research, 79(4), 1277-1290. doi: 10.21608/ejar.2001.320874
MOHAMED S. NAWAR; MOHAMED A. ZAHER; MOHAMED A. M. EL-ENANY; ABLA A. IBRAHIM. "EFFECT OF SOME BIOTIC AND ABIOTIC FACTORS ON THE BIOLOGY OF TYPHLODROMUS ATHIASAE (ACARI: PHYTOSEIIDAE)". Egyptian Journal of Agricultural Research, 79, 4, 2001, 1277-1290. doi: 10.21608/ejar.2001.320874
NAWAR, M., ZAHER, M., EL-ENANY, M., IBRAHIM, A. (2001). 'EFFECT OF SOME BIOTIC AND ABIOTIC FACTORS ON THE BIOLOGY OF TYPHLODROMUS ATHIASAE (ACARI: PHYTOSEIIDAE)', Egyptian Journal of Agricultural Research, 79(4), pp. 1277-1290. doi: 10.21608/ejar.2001.320874
NAWAR, M., ZAHER, M., EL-ENANY, M., IBRAHIM, A. EFFECT OF SOME BIOTIC AND ABIOTIC FACTORS ON THE BIOLOGY OF TYPHLODROMUS ATHIASAE (ACARI: PHYTOSEIIDAE). Egyptian Journal of Agricultural Research, 2001; 79(4): 1277-1290. doi: 10.21608/ejar.2001.320874

EFFECT OF SOME BIOTIC AND ABIOTIC FACTORS ON THE BIOLOGY OF TYPHLODROMUS ATHIASAE (ACARI: PHYTOSEIIDAE)

Article 2, Volume 79, Issue 4, October 2001, Page 1277-1290  XML PDF (3.95 MB)
Document Type: Original Article
DOI: 10.21608/ejar.2001.320874
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Authors
MOHAMED S. NAWAR1; MOHAMED A. ZAHER1; MOHAMED A. M. EL-ENANY2; ABLA A. IBRAHIM2
1Agricultural Zoology Department, Faculty of Agriculture, Cairo University, Giza, Egypt
2Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
Abstract
Some biotic and abiotic factors affecting the biology of the pred­atory mite, Typhlodromus athiasae P. & S. were studied using immatures of Tetranychus urticae Koch as prey. Relative humidity 70%-85% were the optimum as shortened life cycle (8.4 and 9.1 days) and increased fe­male fecundity (14.5 and 12.9 eggs/female/10 days) at 25°C. Single mated female gave the shortest longevity (40.5 days) and the smallest fecundity (12.8 eggs/female), while full companionship with male allover longevity (multiple mated) gave the longest longevity (48.6 days) and the greatest fecundity (46.3 eggs / female). T.urticae gave the greatest attractancy percentage (40%) (adults, 15%; immatures, 15%; eggs, 10%) in the shortest time (6.5, 8.5, 11.3 minutes, respectively) for fed predator female. Also, fed female was better than 24 hours starved and the latter better than 48 hours starved female. Low temperatures of 5 and 10°C increased egg incubation period as cold storage preceded. To­tal hatchability percentage decreased with increase of cold storage from one to four weeks with less percentage at 5°C (61% to 10%). Females proved to be better stored than eggs. Thin smooth reticulated plant leaves (Bauhinia) resulted in acceleration of development (7.8 days) and increase egg deposition (16.8 eggs/female/10 days) than coarse reticu­lated leaves (guava) (9.7 days and 10.7 eggs/female/10 days).
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