Original Research
Flystrike prevention on Merino lambs with the insect growth regulator dicyclanil
Journal of the South African Veterinary Association | Vol 71, No 1 | a673 |
DOI: https://doi.org/10.4102/jsava.v71i1.673
| © 2000 H.R. Schmid, W.B. Hyman, C. De Bruin, A.P. Van Zyl, P. Junquera
| This work is licensed under CC Attribution 4.0
Submitted: 10 July 2000 | Published: 10 July 2000
Submitted: 10 July 2000 | Published: 10 July 2000
About the author(s)
H.R. Schmid,W.B. Hyman,
C. De Bruin,
A.P. Van Zyl,
P. Junquera,
Full Text:
PDF (75KB)Abstract
The efficacy of a ready-to-use 5 %dicyclanil pour-on formulation as a preventative of natural flystrike on Merino lambs was investigated in a field trial involving 5 sites in the southern Cape Province. A total of 1804 lambs treated with dicyclanil were compared with 882 untreated control lambs for up to 25 weeks after treatment. Efficacy was assessed by calculating the weekly cumulative strike rate at each site and aggregated for all sites, as well as by calculating the percentage reduction achieved in treated lambs. Cumulative strike rates for the untreated controls aggregated for all sites at Weeks 9, 14 and 19 after treatment reached 6.2, 12.8 and 17.8 %, respectively, compared with 0.4, 1.7 and 3.6 %for the dicyclanil treated lambs. Percentage control aggregated for all sites at Weeks 9, 14 and 19 after treatment was 93, 87 and 80 %, respectively. Heavy rains during the 1st half of the trial did not substantially reduce the efficacy of the product.
Keywords
Blowfly Strike; Dicyclanil; IGR; Insect Growth Regulator; Merino Lambs
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