title: In vitro efficacy of ByeMite and Mite-Stop on developmental stages of the red chicken mite Dermanyssus gallinae.
abstract: The present in vitro study shows the efficacy of two antimite products (ByeMite = phoxim, Mite-Stop = neem seed extract) against all developing stages of the important red chicken mite Dermanyssus gallinae (obtained at two farms in France and Germany). While permanent contact with the active compound led to an efficacy of 100% in the case of Mite-Stop on mites in both farms, there was only a 96.2% killing effect of ByeMite on the mites of the French farm. Even short contacts of only 4 s killed 100% of mites in the case of Mite-Stop at the French farm and only 84.5% in the German farm. ByeMite, on the other hand, killed only 27.8% (Germany) and 30% (France) when mites got the chance to escape from the treated grounds to untreated ones. When using only the half doses of both products, Mite-Stop(R) still reached, after permanent contact, 100% activity on the German farm and 98.2% in France, while ByeMite killed 93.8% (Germany) and 90.6% (France). Short contact to half doses of course reduced the activity of both products (Mite-Stop = 59.3% in France, 22.1% in Germany; ByeMite = 28.8% in France, 18.8% in Germany). With respect to the fumigant activity of the products, the strains of D. gallinae reacted differently. While Mite-Stop(R) showed a clear fumigant activity in the case of the German mites, this product did not affect the French mites by air distribution, neither did ByeMite in both cases. Therefore, mites have to come in contact with both products. Against Mite-Stop, there was apparently no resistance and low doses have high efficacy after even short contacts, which regularly occur in a treated stable, where mites have the chance to leave treated places to untreated hidden spots.
authors.affiliation: Zoology Department, Faculty of Science, Cairo University, Giza, Egypt.
authors.forename: Fathy
authors.initials: F
authors.lastname: Abdel-Ghaffar
authors.forename: Margit
authors.initials: M
authors.lastname: Semmler
authors.forename: Khaled
authors.initials: K
authors.lastname: Al-Rasheid
authors.forename: Heinz
authors.initials: H
authors.lastname: Mehlhorn
mesh_terms: D000053:Acari / Q000187:drug effects*; D000818:Animals; D002645:Chickens; D004305:Dose-Response Relationship, Drug; D005602:France; D005651:Fumigation; D005858:Germany; D007306:Insecticides / Q000494:pharmacology*; D008924:Mite Infestations / Q000469:parasitology*; D011201:Poultry Diseases / Q000469:parasitology*; D016019:Survival Analysis; D013997:Time Factors
chemical_list: D007306:Insecticides
references.citation: Poult Sci. 1995 Nov;74(11):1793-8
references.pmid: 8614688
references.citation: Vet Parasitol. 2007 Jul 20;147(3-4):289-96
references.pmid: 17543456
references.citation: Anal Chim Acta. 2007 Mar 14;586(1-2):330-5
references.pmid: 17386732
references.citation: Exp Appl Acarol. 2009 Jun;48(1-2):3-10
references.pmid: 19160060
references.citation: Ann N Y Acad Sci. 2008 Dec;1149:255-8
references.pmid: 19120224
references.citation: Vet Parasitol. 2007 May 31;146(3-4):329-36
references.pmid: 17382475
references.citation: Vet Parasitol. 1998 Nov 16;79(3):239-45
references.pmid: 9823064
references.citation: Parasitol Res. 2008 Aug;103(3):481-5
references.pmid: 18481087
references.citation: Parasitol Res. 2008 Dec;104(1):145-8
references.pmid: 18769941
references.citation: Folia Parasitol (Praha). 1982;29(4):371-4
references.pmid: 7160791
references.citation: Exp Appl Acarol. 2009 Jun;48(1-2):11-8
references.pmid: 19089591