Acaricidal activity of the combination of plant crude-extracts to tropical cattle ticks
1994
Narong Chungsamarnyart | Chainarong Rattanakreetakul | Weerapol Jansawan (Kasetsart Univ., Bangkok (Thailand). Faculty of Veterinary Medicine. Dept. of Veterinary Anatomy)
Thirty four ethanol crude-extracts of plant species were studied the acaricidal activity of the two combined crude-extracts to the engorged female tropical cattle tick (Boonphilus microplus). The concentration of crude-extract was 2.5 percent in mixed solution of 9 parts of 1 percent Tween 80 and 1 part of 100 percent ethanol. The acaricidal activity of the combined crude-extracts were tested by dipping method and observed the corrected mortality of the ticks after dipping 24 h, 48 h and 7 days. The acute acaricidal activity were highly found in the combined crude-extracts as follows; Aganonerion polymorphum Pierre ex Spire (Som-lom) with Calotropis procera R.Br. (Rak-dok-khaao), A. polymorphum with Anethum graveolens L. (Phak-chee-laao); C. procera with Pentapetes phoenicia L..(Po-seng). The delayed acaricidal activity were highly exhibited in the combined crude-extracts of A. polymorphum with Calotropis gigantea R.Br. (Rak-dok-muang), A. polymorphum with Cryptostegia grandiflora R.Br.(Baan-buree-muang), A. polymorphum with lxora nigricans Wight & Arn. (Lum-Phuk), C. gigantea with C. grandiflora C. gigantea with P. phoenicia, I. nigricans with A. graveolens, and Annona muricata L. (Thu-rian-thet) with piper nigrum L. (Phrik-thai-dam). This results indicated that the practical application of the combination of two crude-extracts of these common plants to control the tropical cattle tick is possible.
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