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NASSAR, O., IBRAHIM, S., ISKANDER, N., ISKANDER, A. (1995). BIOLOGICAL AND TOXICOLOGICAL STUDIES OF CERTAIN PLANT EXTRACTS ON EUTETRANYCHUS ANNECKE! MEYER AND TETRANYCHUS URT! CAE KOCH.. Egyptian Journal of Agricultural Research, 73(3), 703-713. doi: 10.21608/ejar.1995.441941
OMR A. NASSAR; SOFY M. IBRAHIM; NABEL G. ISKANDER; AYDA K. F. ISKANDER. "BIOLOGICAL AND TOXICOLOGICAL STUDIES OF CERTAIN PLANT EXTRACTS ON EUTETRANYCHUS ANNECKE! MEYER AND TETRANYCHUS URT! CAE KOCH.". Egyptian Journal of Agricultural Research, 73, 3, 1995, 703-713. doi: 10.21608/ejar.1995.441941
NASSAR, O., IBRAHIM, S., ISKANDER, N., ISKANDER, A. (1995). 'BIOLOGICAL AND TOXICOLOGICAL STUDIES OF CERTAIN PLANT EXTRACTS ON EUTETRANYCHUS ANNECKE! MEYER AND TETRANYCHUS URT! CAE KOCH.', Egyptian Journal of Agricultural Research, 73(3), pp. 703-713. doi: 10.21608/ejar.1995.441941
NASSAR, O., IBRAHIM, S., ISKANDER, N., ISKANDER, A. BIOLOGICAL AND TOXICOLOGICAL STUDIES OF CERTAIN PLANT EXTRACTS ON EUTETRANYCHUS ANNECKE! MEYER AND TETRANYCHUS URT! CAE KOCH.. Egyptian Journal of Agricultural Research, 1995; 73(3): 703-713. doi: 10.21608/ejar.1995.441941

BIOLOGICAL AND TOXICOLOGICAL STUDIES OF CERTAIN PLANT EXTRACTS ON EUTETRANYCHUS ANNECKE! MEYER AND TETRANYCHUS URT! CAE KOCH.

Article 11, Volume 73, Issue 3, September 1995, Page 703-713  XML PDF (2.52 MB)
Document Type: Original Article
DOI: 10.21608/ejar.1995.441941
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Authors
OMR A. NASSAR1; SOFY M. IBRAHIM2; NABEL G. ISKANDER2; AYDA K. F. ISKANDER2
1Agricultural Zoology Department, Faculty of Agricultural, Mansoura University, Mansoura, Egypt
2Plant Protection Research institute, Agricultural Research Centre, Dokki, Giza, Egypt
Abstract
The efficiency of ethanol extracts from Duranta and Lantana plants as expressed in LC50 and LC90 values against adult females of Eutertanychus anneckei Meyer was studied. The LC50 and LC90 for Duranta were 250.95 and 406.44 ppm,respectively. The corresponding values for Lantana were 564.93 amd 699.31 ppm. The two plant extracts did not affect egg hatchability of E.anneckei,while the newly hatched larvae failed to reach the adult stage. The biological aspects of Tetranychus urticae Koch were more affected by Duranta and Lantana plant extracts. T. urtica could be reared on Lantana leaves, a matter that prolonged its life cycle as compared with the control .Thiis mite species however never fed on Duranta leaves. After treatment the adult females of T.urticae with 500 and 1000 ppm of Duranta and Lantana extracts,the averages of life cycle durations were 10.8,10.6,12.68,and 9.40 days, respectivey. The longevity periods of adult females of T . urticae were highly affected,as they averaged 5.46,3.54,10.67 and 6.06 days,when treated with the two concentrations of Duranta and Lantana plant extracts,respectively compared with that of the control which averaged 15.57 days. The total number of deposited eggs per female were highly affected with Duranta and Lantana extracts,as it ranged between 1.47 and 23.87 eggs compared with 68.53 eggs for the control .
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