Southwestern Entomologist (2018) 43, 295-301

J.A. Goolsby, N.K. Singh, D.I. Shapiro-Ilan, R.J. Miller, P.J. Moran and A.A. Perez de Leon (2018)
Treatment of cattle with Steinernema riobrave and Heterorhabditis floridensis for control of the southern cattle fever tick, Rhipicephalus (=Boophilus) microplus
Southwestern Entomologist 43 (2), 295-301
Abstract: Entomopathogenic nematodes are a promising alternative for tick control, especially to protect wildlife. Two entomopathogenic nematode species Steinernema riobrave Cabanillas, Poinar, and Raulston and Heterorhabditis floridensis Nguyen, Gozel, Koppenhöfer, and Adams were tested for in-vivo efficacy against southern cattle fever tick, Rhipicephalus (=Boophilus) microplus Canestrini. Twelve heifer calves were experimentally infested three times at 1-week intervals with 125 mg of larvae of southern cattle fever ticks on days 0, 7, and 14. On Day 21, the animals were randomly divided into three treatment groups and sprayed with water only (check) or 5,000 infective juvenile S. riobrave or H. floridensis nematodes per milliliter. Number of ticks dropped, reproductive index, percentage of inhibition of oviposition, and hatching rate were calculated. S. riobrave and H. floridensis affected all life stages of the tick, and caused 14.5 and 25.4% reduction in production of adult engorged female ticks during the first 21 days post treatment. The nematodes significantly affected the reproductive parameters of treated ticks, but not egg hatchability. To our knowledge this is the first study to show a negative impact on ticks by entomopathogenic nematodes applied directly to the mammalian host of the tick. But, additional research is needed to enhance tick control using entomopathogenic nematodes. Novel formulations that enhance penetration or survival by nematodes should be investigated.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): David I. Shapiro-Ilan, John A. Goolsby

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
application technology

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhipicephalus microplus
Steinernema riobrave/Xenorhabdus cabanillasii (entomopathogen)	Rhipicephalus microplus
Heterorhabditis floridensis (entomopathogen)	Rhipicephalus microplus