Search Result of "Chainarong Ratanakreetakul"

About 2 results
Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Acaricidal Activity of the Combination of Plant Crude-extracts to Tropical Cattle Ticks)

ผู้เขียน:Imgดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์, ImgChainarong Ratanakreetakul, Imgนายวีระพล จันทร์สวรรค์, รองศาสตราจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

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 (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.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 028, Issue 4, Oct 94 - Dec 94, Page 649 - 660 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Side effects of some herbicides to Fusarium moniliforme and its antagonistic microorganisms)

ผู้เขียน:ImgChainarong Ratanakreetakul, Imgนายวิชัย ก่อประดิษฐ์สกุล, รองศาสตราจารย์, ImgChiradej Chamsawarng

สื่อสิ่งพิมพ์:pdf

Abstract

Forty six isolates of fungi and forty isolate of bacteria were isolated from sugarcane field soil, Kasetsart University, Kamphaengsaen Campus in 1986-88 by spreading soil suspension on selected media, Marin’s medium and Nutrient agar. The dominant isolate of soil microorganisms were Aspergillus spp. And gram negative bacteria. Eight isolates of those fungi showed the antagonistic effect to Fusarrium moniliforme namely A. niger, A. flavus isolate 1 and 2 , A. fumigatus, A. tamarii, Curvalaria sp. Isolate 1 and 2, and Trichoderma sp., where two isolates of gram negative and two isolates of gram positive bacteria were included. The inhibitory effect of herbicides, atrazine, ametryn and paraquat, to F. moniliforme and its antagonists was tested by poisoned food tcchnique on PDA and Co2 production of herbicide treated soil in anaerobic condition. Ametryn showed the best inhibitory effect to F. moniliforme. All antagonistic fungi were inhibited by atrazine whereas slightly effect was founded in paraquat and ametryn treatment. Highly inhibitory effect to herbicide to all isolates of antagonistic bacteria was observed in paraquat treatment.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 024, Issue 5, Jan 90 - Dec 90, Page 41 - 48 |  PDF |  Page