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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Acaricidal Activity of the Combination of Plant Crude-extracts to Tropical Cattle Ticks) ผู้เขียน: ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์ ,  Chainarong Ratanakreetakul, นายวีระพล จันทร์สวรรค์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThirty 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 (Boophilus microplus). The concentration of crude-extract was 2.5% in mixed solution of 9 parts of 1% Tween 80? and 1 part of 100% ethanol. The acaaricidal 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 wxhibited in the combined crude-extracts of A. polymorphum with Calotropis gigantean 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. gigantean 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. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Acaricidal Activity of Peel Oil of Citrus spp. On Boophilus microplus) ผู้เขียน:Narong Chungsamarnyary, นายวีระพล จันทร์สวรรค์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractPeel oil from three varieties of Citrus maxima Merr. (pomelo): Khaao-phuaing (immature fruit), Thong-dee (immature and mature fruits) and Khaao-nam-phueng (mature fruits); Citrus reticulata Blanco., Citrus suncris Linn., Citrus sinensis Linn. And Citrus hystrix DC. were collected by mechanical pressing. These peel oil and the d-limonene substance were diluted with 95% ethanol into 1:5, 1:10 and 1:5 (V/V) and tested the acaricidal activity on the engorged female cattle tick (Boophilus microplus) by dipping method. The acaricidal activity on the tick larvae was tested with these oil and d-limonene dilution of 1:10 and 1:15 (V/V). The peel oil of C.reticulata and C.maxima variety thong-dee (immature and mature fruits) showed high acaricidal activity at the concentration of 1:10 (V/V) on engorged female ticks. These peel oil activity were 2 times thigher than that of d-limonene. The peel oil concentration 1:10 of C.sinensis and C.maxima (mature) exhibited high larvicidal activity, while the oil of C.hystrix, C.reticulata, C.suncris and C.maxima (immature fruits) showed relatively high larvicidal activity. Their larvicidal activity were 1.5 times stronger than d-limonene. The peel oil of the other citrus spp. Exhibited weaker acaricidal activity. This indicated that the peel oil from the citrus fruits could be directly applied to control the cattle tick. The waste of the over fruiting immature pomelo, would be of potential usage as a biocontrol substance. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Acaricidal Activity of Volatile oil from Lemon and Citronella Grasses on Tropical Cattle Ticks) ผู้เขียน:ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์, ดร.สุรัตน์วดี จิวะจินดา สื่อสิ่งพิมพ์:pdf AbstractVolatile oil was obtained from lemon grass (Cymbopogon citratus stapf.) and citronella grass (Cymbopogon nardus Rendle.) leaves by steam distillation. The yields were 0.39% and 0.68% from the fresh leaves of lemon and citronella grasses respectively. Oil yield from dried leaves of lemon and citronella grasses were 0.52% and 1.20%, respectively. The stems and roots gave very less amount of oil. The oil was diluted with 95% ethanol and tested for acaricidal activity on larvae and engorge female cattle ticks (Boophilus microplus) by dipping method. The oil from fresh lemon grass showed high larvicidal activity (1-2 h after dipping) at the concentration of 1:8, 1:12 and 1:16 (oil/ethanol; V/V), while the oil from fresh citronella grass exhibited high activity at concentration of 1:8 and 1:12 (V/V). On the engorge female ticks, the lemon grass oil concentration of 1:2, 1:3 and 1:4 (oil/ethanol; V/V) exhibited high acaricidal activity on 5 days after dipping, but the citronella oil showed high activity at concentration of 1:2 and 1:3. The oil from dried leaves of both grasses showed weaker acaricidal activity on both larvae and adult ticks. In vivo acaricidal bioassay, the ethanol dilution 1:3 (V/V) of both oils were tested by spraying to the tick on cattle. The pre-engorge stage ticks collapsed and died on cattle’s skin while the collected engorge female ticks could not laid and died at 5 days after spraying. This indicates that volatile oil from lemon and citronella grasses can be practically used for controlling cattle ticks. |
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 Researcherดร. ณรงค์ จึงสมานญาติ, รองศาสตราจารย์ที่ทำงาน:สำนักงานเลขานุการ คณะสัตวแพทยศาสตร์ สาขาที่สนใจ:มหกายวิภาคศาสตร์และจุลกายวิภาคศาสตร์ของสัตว์เลี้ยง, การวิภาคศาสตร์ประยุกต์ทางสัตวแพทย์ของม้า สัตว์เคี้ยวเอื้อง สุกร สุนัข แมวและไก่, การทดสอบฤทธิ์ฆ่าเห็บโค สุนัข Resume |
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