FIELD EVALUATION OF CERTAIN INSECTICIDES ON PEGOMYA MIXTA VILL. AND RELATED PREDATORS INHABITING SUGAR BEET FIELDS | ||||
Egyptian Journal of Agricultural Research | ||||
Article 7, Volume 80, Issue 3, September 2002, Page 1055-1064 PDF (2.48 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/ejar.2002.311893 | ||||
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Authors | ||||
BAHAA EL-DIN A. OMAR1; MOHAMED I. EL-KHOULY2; TOHAMY H. TOHAMY2 | ||||
1Central Agricultural Pesticides Laboratory, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
2Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
Abstract | ||||
The role of insecticides, profenofos, diazinon and thiamethoxam, was evaluated against Pegomya mixta infesting sugar beet plants at Kafr El-Sheikh Governorate during two successive seasons 1999/2000 and 2000/2001. The undesirable effect of these insecticides was estimated on certain associated predators, Coccinella undecimpunctata, Chrysoperla camas and Paedetus allierii. Diazinon demonstrates the highest toxic effect expressed as mor-tality percentage averages for the immature stages of P. mixta, after 15 days from treatment. The average of reduction percent was 80.9 % for the 1st and 81.3 % for the 2nd season, followed by profenofos (80.4 and 78 5 %). Thiamethoxam, however demonstrates the least averages (69.2 and 70.5 %). On the other hand, diazinon and profenofos demonstrate the highest toxic figures to the related predators, where the reduction aver-ages were 56.9 & 62.5 %, 64.9 & 63.9 % and 35.0 & 59.5 % for C. un-decimpunctata, Ch. camea and P. allied! for the 1st and 2nd seasons, re-spectively. Thiamethoxam ranks next in this respect. The average reduction percentages were 27.7, 31.0 and 25.6 % for C. undecimpunctate, Ch. camea and P. allied!, respectively. | ||||
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