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 ที่มา:มหาวิทยาลัยเกษตรศาสตร์หัวเรื่อง:ประสิทธิภาพของสารธรรมชาติกำจัดเห็บ หมัด เหา ของสุนัข |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Acaricidal Effect of Practical Crude-extracts of Plants against Tropical Cattle Ticks ) ผู้เขียน: ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์ ,  Weerapol Jansawant สื่อสิ่งพิมพ์:pdf Abstract The acaricidal activity of the plant crude-extracts to tropical cattle ticks were studied in the following plants; Calotropis gigantica R.Br., Calotropis procera R.Br., Cr-ytostegia grandiflora R.Br., Homalonlena aromatica Linn., Kalanchoepinnata Lamk., Pachyrrhizus erosus Lion., Polyscias balfouriana Baill, Rauwolfia serpentina B.K.,Rhinacanthus nasutus Linn., Spilanthes acmella Murr., Streblus aspen Lour., and 7hunbergia erecta T. Anders. The crude-extracts of these plants were extracted with 10% ethanol, water, boiling water and boiled water added with the ethanol to 10%. These crude-extracts were tested for the acaricidal activity to the engorged female tropical cattle ticks (Boophilus microplus). Only the crude-extracts of P. erosus with boiling water showed delayed acaricidal activity (anti-laying activity). The crude-extracts obtaining by different times of extraction with boiling water and hot water were stored in refrigerator and tested on both larvae and engorged female ticks with different dilution. The boiling-water and the hot-water crude-extracts for 20 and 40 min. showed high delayed acaricidal activity at 1:6 and 1:5 dilution, respectively. Both of them were stored in refrigerator for 7 days after extraction. The water boiling for 5-40 min. crude-extracts were stored in the refrigerator for 20 days, exhibited relatively high larvicidal activity at 1: 220 dilution. While the hot water extractfor5-40 min. showed high larvicidal activity at 1: 220 dilution after storing in the refrigerator for 12 days. This indicates that acaricidal substances ofP. erosus (yarn bean) seeds can be easily extracted, and the practical application of this crude-extracts to controlling the tropical cattle tick is expectable. |
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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. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Tamarindus indicus L. Against the Boophilus microplus) ผู้เขียน:ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์, นายวีระพล จันทร์สวรรค์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe crude-extract of Tamarindus indicus L. with water and 10% ethanol in water were tested the acaricidal activity on the engorged female cattle tick (Boophilus microplus) by dipping method. The mature tamarind fruits taking off the seeds were extracted by water or 10% ethanol in the ratio of 1:2 and 1:5 W/V for 7 days. The corrected mortality of the ticks were observed after dipping at 24 h, 48 h and 7 days. The mean of corrected mortality of ticks of these 4 crude-extracts of tamarind fruits were 56-70 %, 70-89% and 77-99% by no statistically significant different after dipping at 24 h, 48 h and 7 days, respectively. The organic acids in tamarind fruits (oxalic, malic, succinic, citric and tartaric acids) were also bioassayed the acaricidal activity by dipping method. The oxalic acid of 0.5% and 1% concentration exhibited the highest acute acaricidal activity (56% and 62% mortality of ticks at 24 h after dipping, respectively). The tartaric acid 1% concentration showed the highest delayed acaricidal activity (73% mortality of ticks at 7 days after dipping). The mixture of 0.5% of oxalic acid with 0.5% of malic, succinic, citric and tartaric acids by concentration of 1:1 V/V were tested the acaricidal activity. The acaricidal activity of these acid mixtures were not more stronger than those of each individual acid. Both of crude-extract of tamarind fruits and their organic acids caused the patchy hemorrhagic swelling on the skin of ticks after dipping at 15 min. This indicates that the crude-extract of tamarind fruits by water or 10% ethanol is possibly use in practical for controlling the tropical cattle tick. The active substances are their organic acids, especially oxalic and tartaric acids. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Acaricidal Effect of Plant Crude-extracts on Tropical Cattle Ticks (Boophilus microplus)) ผู้เขียน:ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์, ดร.สุรัตน์วดี จิวะจินดา, นายวีระพล จันทร์สวรรค์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe 171 ethanol crude-extracts from 151 plant species were in vitro tested for acaricidal activity on adult tropical cattle ticks by the dipping method. The 10% solution of crude-extract of Calotropis gigantea R. Br. And Streblus asper Lour. Exhibited high acaricidal activity (92% and 100% corrected mortality of ticks 48 h after dipping). Relatively high acaricidal activity (71-85% mortality) was found in the crude-extracts of Aganorcrion polymorphum P.S., Datura metel L. and Rhinacanthus nasutus Kurz. Acaticidal activity of some crude-extracts was observed 5 days after dipping, Which might indicate delayed toxicity. The high delayed acaricidal activity ( 86-100% non laying ) was occurred in Alpinia officinarum Hance, Annona muricata Llk Calotropis procera R.Br., Michelia champaca L;, Pachyrrhisus erosus L., Plumbago zeylandica L, Polyscias balfouriana B., Premna latifolia Roxb., Thunbergia erecta T. Anders., and Thunbergia laurifolia Lindl.. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Isolation of Acaricidal Substances against Tropical Cattle Ticks from Sugar Apple Seeds) ผู้เขียน:ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์, Sugunya Mahatheeranont, Chainarong Rattankkreetakul, ดร.สุรัตน์วดี จิวะจินดา, นายวีระพล จันทร์สวรรค์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractIsolation of acaricidal active substances from sugar apple seeds (Annona squamosa L.) against tropical cattle ticks (Boophilus microplus) was performed. Two active compounds were found in ethyl acetate part of ethanol extracted crude. The compound I (R 0.59) was isolated from twice chromatographed fractions of 60-100% ethyl acetate/toluene (F4-6) and 10, 20% ethanol/ethyl acetate (F7-8), and of 10% ethanol/ethyl acetate (FF 7) by preparative TLC (developed with hexane:acetone; 3:2) and preparative HPLC (reverse phase C subscript 18 column, 85% MeOH in water, 210 nm UV detecter). The compound II (R 0.31) was isolated from triple chromatographed of 80% ethyl acetate/toluene (F5), 45-60% acetone/hexane (F A), and of 40-50% ethyl acetate/toluene (FF B) respectively by preparative TLC (developed with hexane:acetone, 3:2). The compound I and II displayed a highest mass in EI mass spectrum at 623 and 432 mass unit, respectively. The fragmentation pattern of compound I are similar to those known substance; squamocin and acetogenin. The protron NMR spectrum of both compounds displayed the similarly pattern of triterpenoid. |