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NEGM, S., SALEH, A., ABD ELHADY, A., BEKHEAT, H., ABDELWAHAB, R. (2009). DEMOGRAPHIC-TOXICOLOGICAL STUDIES RELATED WITH RESISTANCE OF DIFFERENT PESTICIDES ON TETRANYCHUS URTICAE KOCH(ACARI : TETRANYCHIDAE). Egyptian Journal of Agricultural Research, 87(4), 955-971. doi: 10.21608/ejar.2009.198432
SALWA E. NEGM; ADEL A. SALEH; ALY A. ABD ELHADY; HAMAM A. BEKHEAT; RANIA A. ABDELWAHAB. "DEMOGRAPHIC-TOXICOLOGICAL STUDIES RELATED WITH RESISTANCE OF DIFFERENT PESTICIDES ON TETRANYCHUS URTICAE KOCH(ACARI : TETRANYCHIDAE)". Egyptian Journal of Agricultural Research, 87, 4, 2009, 955-971. doi: 10.21608/ejar.2009.198432
NEGM, S., SALEH, A., ABD ELHADY, A., BEKHEAT, H., ABDELWAHAB, R. (2009). 'DEMOGRAPHIC-TOXICOLOGICAL STUDIES RELATED WITH RESISTANCE OF DIFFERENT PESTICIDES ON TETRANYCHUS URTICAE KOCH(ACARI : TETRANYCHIDAE)', Egyptian Journal of Agricultural Research, 87(4), pp. 955-971. doi: 10.21608/ejar.2009.198432
NEGM, S., SALEH, A., ABD ELHADY, A., BEKHEAT, H., ABDELWAHAB, R. DEMOGRAPHIC-TOXICOLOGICAL STUDIES RELATED WITH RESISTANCE OF DIFFERENT PESTICIDES ON TETRANYCHUS URTICAE KOCH(ACARI : TETRANYCHIDAE). Egyptian Journal of Agricultural Research, 2009; 87(4): 955-971. doi: 10.21608/ejar.2009.198432

DEMOGRAPHIC-TOXICOLOGICAL STUDIES RELATED WITH RESISTANCE OF DIFFERENT PESTICIDES ON TETRANYCHUS URTICAE KOCH(ACARI : TETRANYCHIDAE)

Article 8, Volume 87, Issue 4, December 2009, Page 955-971  XML PDF (240.36 K)
Document Type: Original Article
DOI: 10.21608/ejar.2009.198432
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Authors
SALWA E. NEGM1; ADEL A. SALEH1; ALY A. ABD ELHADY1; HAMAM A. BEKHEAT2; RANIA A. ABDELWAHAB2
1Pesticide Department, Faculty of Agriculture, Mansoura University, Egypt
2Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt
Abstract
Demographic bioassays were carried out in the laboratory to assess the demographic responses with gained resistance of Tetranychus urticae Koch to Vertimec, Cypermethrin, Methomyl and Malathion at two sublethal concentrations(LC50 and LC25) through 40 generations. Life table data were used in each sublethal treatment of parents , F2, F6 ,F10 , F20 , F30 and F40. Life cycle durations ranged from 30.73 to 16.05 days at LC50 and from 23.84 to 11.87 days at LC25 of tested pesticides,resp. Life span durations ranged from 21.71 % to -28.12 % at LC50 and from 17.84% to -30.96 % at LC25 of tested pesticides,comparing with the check. Intrinsic rate of increase (Rm) and two population growth rates(fecundity λ and vitality λ)for T.urticae (hereafter given in units λ /day)were estimated and discussed
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