אסיף מאגר המחקר החקלאי

Factors affecting the virulence of entomopathogenic nematodes to engorged female Boophilus annulatus ticks

Year:

2001

Source of publication :

Authors :

Volume :

87

Co-Authors:

Glazer, I., Department of Nematology, ARO, Volcani Center, Bet-Dagan 50250, Israel
Alekseev, E., Kimron Veterinary Institute
Samish, M., Kimron Veterinary Institute

Facilitators :

Link :

Abstract:

The laboratory trials rank the virulence of entomopathogenic nematode strains (3 heterorhabditids and 6 steinernematids) to engorged female Boophilus annulatus ticks according to 3 parameters of the infection process: the effect of exposure time on tick mortality, the quantity of nematodes that penetrate ticks, and the rate of tick mortality after the injection of 1, 2, or 3 nematodes. Exposure of the ticks to heterorhabditid strains for 6 hr resulted in >80% mortality, but only 20 or 65% mortality after exposure to most steinernematids. The quantity of nematodes recovered per tick exposed to nematodes for 6 days averaged from 16 to 141. For steinernematids, a negative correlation was obtained between tick mortality and the average quantity of nematodes recovered. Injecting 1 infective juvenile from 1 of 2 heterorhabditid strains into each tick resulted in close to 100% mortality. Increasing the quantity of nematodes injected into each tick had little or no additive effect on tick mortality.

Note:

Related Files :

תוכן קשור

More details

You may also be interested in