EFFICACY OF SOME BIOPESITICIDES AGAINST TETRANYCHUS URTICAE INFESTING COWPEA PLANTS AND THEIR SIDE-EFFECTS ON CERTAIN PREDATORS
OMAR, B., EL-KHATEEB, H. (2002). EFFICACY OF SOME BIOPESITICIDES AGAINST TETRANYCHUS URTICAE INFESTING COWPEA PLANTS AND THEIR SIDE-EFFECTS ON CERTAIN PREDATORS. EKB Journal Management System, 80(3), 1157-1172. doi: 10.21608/ejar.2002.312023
BHAA EL-DIN A. OMAR; HANAA M. A. EL-KHATEEB. "EFFICACY OF SOME BIOPESITICIDES AGAINST TETRANYCHUS URTICAE INFESTING COWPEA PLANTS AND THEIR SIDE-EFFECTS ON CERTAIN PREDATORS". EKB Journal Management System, 80, 3, 2002, 1157-1172. doi: 10.21608/ejar.2002.312023
OMAR, B., EL-KHATEEB, H. (2002). 'EFFICACY OF SOME BIOPESITICIDES AGAINST TETRANYCHUS URTICAE INFESTING COWPEA PLANTS AND THEIR SIDE-EFFECTS ON CERTAIN PREDATORS', EKB Journal Management System, 80(3), pp. 1157-1172. doi: 10.21608/ejar.2002.312023
OMAR, B., EL-KHATEEB, H. EFFICACY OF SOME BIOPESITICIDES AGAINST TETRANYCHUS URTICAE INFESTING COWPEA PLANTS AND THEIR SIDE-EFFECTS ON CERTAIN PREDATORS. EKB Journal Management System, 2002; 80(3): 1157-1172. doi: 10.21608/ejar.2002.312023

EFFICACY OF SOME BIOPESITICIDES AGAINST TETRANYCHUS URTICAE INFESTING COWPEA PLANTS AND THEIR SIDE-EFFECTS ON CERTAIN PREDATORS

Egyptian Journal of Agricultural Research
Article 16, Volume 80, Issue 3, September 2002, Page 1157-1172  XML PDF (3.88 MB)
Document Type: Original Article
DOI: 10.21608/ejar.2002.312023
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Authors
BHAA EL-DIN A. OMAR1; HANAA M. A. EL-KHATEEB2
1Central Agricultural Pesticides Laboratory, Agricultural Research Centre, Dokki, Giza, Egypt.
2Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt.
Abstract
The effects of abamectin, a natural product produced by the soil microorganisms Streptomyees avermitilis, azadirachtin, a natural product from neemplants, Beauwaris &fastens an entomopathogenic fungus, thi‌ocyclam hydrogen oxalate, a product from the marine annelid worm Lunt‌brinereis spp. and lenazaquin, a conventional acaricide were evaluated against Tetrenychus unless infesting cowpea, Wpna sinensis, during 2000 and 2001 seasons. The side — effects of these materials on T. unit en associated predators. Euseius seutars (a predatory mite) and Cho& soporla etyma (a predatory insect) were also evaluated. The obtained data revealed that azadirachtin was the most po‌tent compound introducing the population size of T. unites after two seasons. The general mean reduction percentage was 80.71%. followed by B. bassiana and abamectin (77.59 and 76.35% respectively). Howev‌er, thiocyctam and fenazaquin demonstrated low reduction percentages (55.96 and 52.26% respectively). Fenazaquin and thiocyclam demonstrated unacceptable toxic ef‌fect on E. scutalis. The general mean reduction percentages were 72.11 and 63.14%. respectively. However, azadirachtin exhibited the lowest toxic effect (12.35%). The most harmful compound on the associated predator C. alma was fenazaquin followed by thiocyclam, they reduced the predator populations by 54.84 and 44.59% respectively. The most secure compound was azadirachtin followed by B. bassiana and abamec‌fin, reduction percentages were 18.95, 23.44 and 27.31%, respectivley. In conclusion, azadrachtin, a bassiana and abamectin can be ap-plied effectively against T. unless with minimal impact on the non-target organisms, i.e. the phytoseiid mite E. scutalis and the thysanoptorous In-sect C. came& They may be classified as IPM-compatible acaricides In the integrated pest management programms against. T. unless infesting snap bean. 
Keywords
Biopesticides; predatory mite; predatory insect
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