INCIDENCE OF BLACK VINE THRIPS, Retithrips syriacus MAYET AND RED EUROPEAN MITE, Panonychus ulmi (KOCH) INFESTING GRAPEVINES IN ASSIUT GOVERNORATE IN RELATION TO YIELD
Z. Embarak, M., A. M. M. Omran, Y., H. Mannaa, S. (2008). INCIDENCE OF BLACK VINE THRIPS, Retithrips syriacus MAYET AND RED EUROPEAN MITE, Panonychus ulmi (KOCH) INFESTING GRAPEVINES IN ASSIUT GOVERNORATE IN RELATION TO YIELD. EKB Journal Management System, 39(4), 160-171. doi: 10.21608/ajas.2008.270092
M. Z. Embarak; Y. A. M. M. Omran; S. H. Mannaa. "INCIDENCE OF BLACK VINE THRIPS, Retithrips syriacus MAYET AND RED EUROPEAN MITE, Panonychus ulmi (KOCH) INFESTING GRAPEVINES IN ASSIUT GOVERNORATE IN RELATION TO YIELD". EKB Journal Management System, 39, 4, 2008, 160-171. doi: 10.21608/ajas.2008.270092
Z. Embarak, M., A. M. M. Omran, Y., H. Mannaa, S. (2008). 'INCIDENCE OF BLACK VINE THRIPS, Retithrips syriacus MAYET AND RED EUROPEAN MITE, Panonychus ulmi (KOCH) INFESTING GRAPEVINES IN ASSIUT GOVERNORATE IN RELATION TO YIELD', EKB Journal Management System, 39(4), pp. 160-171. doi: 10.21608/ajas.2008.270092
Z. Embarak, M., A. M. M. Omran, Y., H. Mannaa, S. INCIDENCE OF BLACK VINE THRIPS, Retithrips syriacus MAYET AND RED EUROPEAN MITE, Panonychus ulmi (KOCH) INFESTING GRAPEVINES IN ASSIUT GOVERNORATE IN RELATION TO YIELD. EKB Journal Management System, 2008; 39(4): 160-171. doi: 10.21608/ajas.2008.270092

INCIDENCE OF BLACK VINE THRIPS, Retithrips syriacus MAYET AND RED EUROPEAN MITE, Panonychus ulmi (KOCH) INFESTING GRAPEVINES IN ASSIUT GOVERNORATE IN RELATION TO YIELD

Assiut Journal of Agricultural Sciences
Article 11, Volume 39, Issue 4, December 2008, Page 160-171  XML PDF (394.89 K)
Document Type: Original Article
DOI: 10.21608/ajas.2008.270092
View on SCiNiTO View on SCiNiTO
Authors
M. Z. Embarak1; Y. A. M. M. Omran2; S. H. Mannaa3
1Plant Protection Res. Institute, Agricultural Research Center, Giza, Egypt
2Horticulture Res. Institute, Agricultural Research Center, Giza, Egypt.
3Plant Protection Dept. Faculty of Agricultural, Assiut University, Assiut, Egypt
Abstract
The present study was carried out to evaluate the incidence of infestation with black vine thrips, Retithrips syriacus Mayet [Thysanoptera; Thripidae] and red European mite, Panonychus ulmi (koch) [Acari: Tetranychidae] on three grapevine varieties in Assiut Gover-norate, during two successive seasons (2005-2007). Generally, the population of R. syriacus was greater than that of P. ulmi in both investigated seasons. The highest population numbers of R. syriacus were recorded during June and July in the first season (2005 / 2006) and during September in the second one (2006 / 2007), on the grapevine varieties (Flame, Thompson and King Rubby). However, the peak of P. ulmi population generally occurred during May and June, in both investigated seasons. Meanwhile, the lowest numbers were recorded during December and January of the first season and during March and April of the second one. With regard to the yield, King Rubby variety exhibited the highest yield, while the lowest yield was that of Thompson variety. In view of the plant content of N, P and K, it was quite obvious that nitrogen and phosphorus positively affected infestation by both pests, while potassium affected negatively
Keywords
Retithrips syriacus; Panonychus ulmi and yield
Statistics
Article View: 117
PDF Download: 246