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Abd El-Aal, A., El-Khawas, K., Asfoor, M., Solyman, S. (2009). COMPARISON BETWEEN THE EFFICACY OF Trichogramma evanesces RELEAS AND THE INSECTICIDES TREATMENTS ON BOLLWORMS AND WHITEFLY IN RELATION TO THEIR PREDATORS IN COTTON FIELDS. Journal of Plant Protection and Pathology, 34(1), 483-488. doi: 10.21608/jppp.2009.119596
A. A. Abd El-Aal; Kh. M. H. El-Khawas; M. A. Asfoor; S. M. Solyman. "COMPARISON BETWEEN THE EFFICACY OF Trichogramma evanesces RELEAS AND THE INSECTICIDES TREATMENTS ON BOLLWORMS AND WHITEFLY IN RELATION TO THEIR PREDATORS IN COTTON FIELDS". Journal of Plant Protection and Pathology, 34, 1, 2009, 483-488. doi: 10.21608/jppp.2009.119596
Abd El-Aal, A., El-Khawas, K., Asfoor, M., Solyman, S. (2009). 'COMPARISON BETWEEN THE EFFICACY OF Trichogramma evanesces RELEAS AND THE INSECTICIDES TREATMENTS ON BOLLWORMS AND WHITEFLY IN RELATION TO THEIR PREDATORS IN COTTON FIELDS', Journal of Plant Protection and Pathology, 34(1), pp. 483-488. doi: 10.21608/jppp.2009.119596
Abd El-Aal, A., El-Khawas, K., Asfoor, M., Solyman, S. COMPARISON BETWEEN THE EFFICACY OF Trichogramma evanesces RELEAS AND THE INSECTICIDES TREATMENTS ON BOLLWORMS AND WHITEFLY IN RELATION TO THEIR PREDATORS IN COTTON FIELDS. Journal of Plant Protection and Pathology, 2009; 34(1): 483-488. doi: 10.21608/jppp.2009.119596

COMPARISON BETWEEN THE EFFICACY OF Trichogramma evanesces RELEAS AND THE INSECTICIDES TREATMENTS ON BOLLWORMS AND WHITEFLY IN RELATION TO THEIR PREDATORS IN COTTON FIELDS

Article 6, Volume 34, Issue 1, January 2009, Page 483-488  XML PDF (436.7 K)
Document Type: Original Article
DOI: 10.21608/jppp.2009.119596
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Authors
A. A. Abd El-Aal1; Kh. M. H. El-Khawas1; M. A. Asfoor2; S. M. Solyman1
1Plant Protection Research Inst., Agric. Research Center, Giza, Egypt.
2Faculty of Agriculture, Al- Azhar Univ. Cairo, Egypt
Abstract
Field trials were conducted at Margha district, Sohag Governorate to evaluate the egg parasitoid, Trichogamma evanescens. (West) release for control both pink bollworm, Pectinophora gossypiella (Sound.) and Spiny bollworm, E. insulana in the cotton fields during the two successive seasons of 2006 and 2007. Generally, the egg releases showed higher reduction in the infestations caused by pink bollworm, than the spiny bollworm either in flowers or green boll stages. On the other hand, the numbers of pink bollworm moths as well as the infestation rates caused by both pink and spiny bollworm larvae were higher in the insecticidal plots than the egg parasitoid release plots during the flowering stage infestation rates caused by Earias insulana  (Boisd) larvae were higher in the Trichogramma plots   than the insecticides plots during bolls stage. Plots received seven Trichogramma release  exhibited lower numbers of insecticidal application as compared with the insecticidal plots. Moreover, higher numbers of predators were noticed in the Trichagramma plots in comparable with the plots treated with insecticidal treatments. Also, the numbers of whit fly nymphs were very highin the plots treated with insecticides as compared with those in insecticide treatments.
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