Pathogenicity Evaluation of Eight Egyptian Isolates of Entomopathogenic Nematodes against Two Tick Species; Argas persicus and Boophilus annulatus
EL Roby, A., Rezk, M., Shamseldean, M. (2018). Pathogenicity Evaluation of Eight Egyptian Isolates of Entomopathogenic Nematodes against Two Tick Species; Argas persicus and Boophilus annulatus. EKB Journal Management System, 9(8), 453-458. doi: 10.21608/jppp.2018.43479
A. S. M. H. EL Roby; M. Z. A. Rezk; M. S. M. Shamseldean. "Pathogenicity Evaluation of Eight Egyptian Isolates of Entomopathogenic Nematodes against Two Tick Species; Argas persicus and Boophilus annulatus". EKB Journal Management System, 9, 8, 2018, 453-458. doi: 10.21608/jppp.2018.43479
EL Roby, A., Rezk, M., Shamseldean, M. (2018). 'Pathogenicity Evaluation of Eight Egyptian Isolates of Entomopathogenic Nematodes against Two Tick Species; Argas persicus and Boophilus annulatus', EKB Journal Management System, 9(8), pp. 453-458. doi: 10.21608/jppp.2018.43479
EL Roby, A., Rezk, M., Shamseldean, M. Pathogenicity Evaluation of Eight Egyptian Isolates of Entomopathogenic Nematodes against Two Tick Species; Argas persicus and Boophilus annulatus. EKB Journal Management System, 2018; 9(8): 453-458. doi: 10.21608/jppp.2018.43479

Pathogenicity Evaluation of Eight Egyptian Isolates of Entomopathogenic Nematodes against Two Tick Species; Argas persicus and Boophilus annulatus

Journal of Plant Protection and Pathology
Article 2, Volume 9, Issue 8, August 2018, Page 453-458  XML PDF (278.82 K)
Document Type: Original Article
DOI: 10.21608/jppp.2018.43479
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Authors
A. S. M. H. EL Roby email 1; M. Z. A. Rezk2; M. S. M. Shamseldean2
1Plant Protection Dept. Faculty of Agriculture, Minia University, Egypt
2Department of Zoology and Agricultural Nematology, Faculty of Agric. Cairo University, Egypt
Abstract
Eight Egyptian isolates of entomopathogenic nematodes (EPN), four belong to the genus Heterorhabditis and four belong to Steinernema were evaluated against adult females of the soft tick Argas persicus and engorged females of the hard tick, Boophilus  annulatus in the laboratory. Results indicated that two EPN isolates (A4 and 10k) of Heterorhabditis were rapidly fatal and have high pathogenicity (100% mortality after 72 hours) against A. persicus when treated with 1000 nematode Infective Juveniles (IJs/ml). Meanwhile, only one isolate (5B) of Steinernema gave accumulated mortality of 93.33% against A. persicus.Furthermore, Heterorhabditis isolates (10 K and A4) caused 93.33% and 86% mortality to B. annulatus. The most effective EPN isolates of Steinernema were 5B and AT4 against B. annulatus, they both gave ca 86.7% mortality. The LC50 values of Heterorhabditis spp. (A4 and 10K isolates) after 72 hrs post infection and LT50 were (27.03 and 257.03 IJs/ml) and (11.94 and 19.2 hrs.), respectively against A. persicus. While, the LC90 was 360.24 and 765.72 IJs/ml for A4 and 10K isolates, respectively. Meanwhile, A4 and 10K isolates exhibited relatively high values of LC50, LC90 andLT50   against B. annulatus, represented by (358.57±0.71 and 812.83 IJs/ ml ); (1258.9 and 2485.9 IJs/ml.) and (25.64 and 51.28 hrs.), respectively. The present study cleared that Entomopathogenic nematodes (EPN) isolates of the genus Heterorhabditis spp. (A4 and 10K) are potentially useful biological tools for tick control.
Keywords
biological control; Argas persicus; Boophilus annulatus; Entomopathogenic nematode; Heterorhabditis spp; Steinernema spp
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