Search Result of "A.C.P. Chu"

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Thai Plant Extracts on the Oriental Fruit Fly II. Repellency Test.)

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

The repellent potency of plant extracts to the Oriental fruit fly, Dacus dorsalis, was determined on the basis of the rate of oviposition on cups containing 20% of citrus juice and coated outside with a mist spray of one gram equivalent of each plant extract per cup. One hundred and thirty extracts from 110 kinds of plants among which 97 were known species and 13 unknown were tested. Fifteen day old female flies which were known to lay high numbers of eggs were used in this experiment. Plant extracts which exhibited high repellency to the oviposition of the female flies were obtained from Azadirachta indica var. siamensis Veleton, Bixa orellana Linn., Citrus hystrix D.C., Cucumis melo Linn., Cymbopogon citrates Stapf., Hedychium coccineum var. angustifolium Roxb., Heliotropium indicum R. Br., Homalomena sp., Ocimum gratissimum Linn., Ricinus communis Linn., and Ternstroemia japonica Thunb. Among the unidentified species, they included En-Luang and Phra-Taba. Moderate levels of repellency were obtained from extracts of Allium sativum Linn., Melodorum fruticosum Lour, and Meha-Kamlang. Mild repellent to the oviposition of the flies was exhibited by plant part extracts of the following species: Acharas aspota Linn., Alpinia siamensis Schum., Andrographis paniculate Wall. Ex Nees, Anona squamosa Linn., Anthemis nobilis Linn, Bougainvillea spectabilis Willd., Cinnamomum siamense Craib., Cinnamomum zeylanicum Linn., Curcuma comosa Roxb., Curcuma longa Linn. ( = C. domestica Veleton), Curcuma zedoaria Roxae, Elholtzia blanda Benth., Eupatorium adenophorum Spreng., Jatropha curcas Linn., Jatropha gossypifolia Linn., Litsea cubeba Pers., Mentha cordifolia Opiz., Momordica charantia Linn., Myristica fragrans Linn., Piper sarmentosum R. ex H., Portulaca pilosa Linn., Quisqualis indica Linn., Stemona tuberose Lour., and Tinospora crispa Miers. Of the unidentified species, they included Gai-Khan, Kan-Tha-Mala, Lai-Ma, Ma-Haw, and Maurakot.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 1, Jan 88 - Mar 88, Page 56 - 61 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา สังคมศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Factors Affecting Lotus Rhizome Production in Nakhon Ratchasima Province and Roi Et Province)

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

This study focused on growers' knowledge and socio-economic situations affecting lotus rhizome production in Thailand. The objectives of the study were: 1) to examine the present state of lotus rhizome production; 2) to determine the production knowledge of lotus rhizome growers and the factors affecting lotus rhizome production; and 3) to determine the socio-economic factors that affect lotus rhizome production. Population of the study was 46 families of lotus rhizome growers in Nakhon Ratchasima and Roi Et provinces. Data were collected through the personal interview method using open-ended and close-ended questionnaires and analyzed by using statistical procedures including arithmetic mean, percentage and correlation. This study revealed that the socio-economic factors such as growing experience, group membership, and total family income derived from lotus rhizome production were affecting lotus rhizome production at the significant levels of .05, .01 and .05 respectively. The production knowledge was found very highly significant relationship with lotus rhizome production at .001 level.

Article Info
Kasetsart Journal of Social Sciences -- formerly Kasetsart Journal (Social Sciences), Volume 022, Issue 1, Jan 01 - Jun 01, Page 98 - 109 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา สังคมศาสตร์

หัวเรื่อง:จากวิทยาการพื้นบ้านสู่วิทยาการแผนใหม่ในการทำนาข้าว : บทสะท้อนการปรับตัวของชาวนาไทยในที่ราบลุ่มภาคกลาง

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

This research is a comparative case study on rice farming technology and dynamics of the recent rice farming transitions under the agro-ecological, technological and socio-economical conditions. The two ricefarming villages of this study were Ban Khoh in Ayutthaya province and Ban Khoh Rat in Nakhon Pathom province, representing the former and the more recent rice-producing reas, respectively. Qualitative research approach was employed, grounded on two conceptual frameworks: the Practical Technology Concept and the Agrarian Systems Concept. Highlights of the findings were as follows: 1) In Ban Khoh of Ayutthaya province, wet-season rice farming was still predominant, depending on single cropping of floating rice. Traces of indigenous rice farming technology could be minimally observed. Transitions to modern rice farming system had been gradual and limited, due to the constraints of the agro-ecology of the rice lands. Only a small number of full-time farmers existed. 2) On the contrary, Ban Khoh Rat of Nakhon Pathom province is an exemplary case of a rapid transition from traditional to a full-scale modern and commercial rice farming. Intensive all-year round rice farming system is predominant. Notably, full-time farmers comprised the majority of the village households. Factors contributing to this rapid transition phenomenon were: the government's continuous export-oriented rice policy, farmers' perceived benefits of intensive rice farming, advantage from the full-scale irrigation network, influx of the green revolution packages of technology, and the supporting culture and innovativeness of the farmers.

Article Info
Kasetsart Journal of Social Sciences -- formerly Kasetsart Journal (Social Sciences), Volume 022, Issue 1, Jan 01 - Jun 01, Page 1 - 13 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Growth Pattern of Stylosanthes hamata cv. Verano under Controlled Environmental Conditions)

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

The growth patterns and development of Stylosanthes hamata cv. Verano were studied in the Controlled environment at DSIR, Palmerston North from seedling emergence to full flowering at 131 days. The results showed that the growth and development of intact Varano were slow at the pre-flowering stage and increased rapidly after the onset of flowering. Maximum growth rate of 2.04 grams/plant/day was recorded between 70 and 80 days and maximum dry weight of 105 grams/plant based on the predicted growth model, was achieved approximately 108 days after seedling emergence. During this post-flowering stage, plant growth in terms of plant dry weight, branch development, leaf number and leaf area increased rapidly. Flowering commenced 35 days after seeding emergence and continued throughout the experimental period. Stem was the major plant component, followed by the inflorescence and leaf fractions.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 2, Apr 88 - Jun 88, Page 144 - 151 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Fruit Quality of ‘Khiew Waan’ Tangerine from Different Growing Locations)

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

Fruit quality of ‘Khiew Waan’ tangerine from five growing locations in Rungsit, Pathoomtani province was studied in relation to their chemical and physical characteristics. The results showed that there were significant differences in chemical (TSS, TA, TSS/TA ratio and ascorbic acid) and physical (peel thickness and seed number) characteristics of tangerine fruits among five growing locations. Tangerine fruits from growing location with thin peel had higher TSS/TA ratio than those with thick peel. Differences in chemical and physical characteristics of tangerine fruits from various growing locations were discussed in relation to orchard conditions and cultural practices of orchard owners.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 4, Oct 88 - Dec 88, Page 279 - 283 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Fishes on Coral Reef Areas of Khang Khao Island (Chonburi Province))

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

The coral reef fish studies were conducted at Khang Khao Island, one of the Sichang Islands, Chonburi Province. Fish specimens were caught by different methods such as trapping, gill-netting, hook and line fishing and rotenone poisoning. Fish traps were placed at four sites and fish specimens were collected about once a week. The average weight of fish caught was 2524.81 gms. Per trap. Forty nine species of 18 familise were found. Five economic important species were recognized, these were Kood-Salad Plectropoma maculatum (BI.), Karang-ta-kiew Epinephelus malabaricus (BI. & Schn.), Soi-nok-khao Plectorhynchus pictus (Thunb.), Pee-suor-pak-yao Chelmon rostratus (Linn.) and Salid-hin Siganus oramin (BI. & Schn.). Most of collected fishes were recognized as reef residents, only a few was visitors.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 1, Jan 88 - Mar 88, Page 16 - 23 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Thai Plant Extracts on the Oriental Fruit Fly1 III. Attractancy Test)

ผู้เขียน:ImgS. Tudsri, ImgB.R. Watkin, ImgA.C.P. Chu, ImgB.J. Forde

สื่อสิ่งพิมพ์:pdf

Abstract

Attractive potency tests were made on 487 extracts of 231 kinds of plants among which 205 were identified and 26 were unknown species. The rates of competitive attractiveness were determind from the number of the Oriental fruit fly, Dacus dorsalis Hendel, which entered at 1, 6, 12 and 24 hours in to traps in an olfactometer in which one gm equivalent of each plant extract was placed in each trap. Eight day old flies of both sexes were used in this experiment. Plants among which demonstrated highly attractive to the test flies were Crinum asiaticum Linn., Dieffenbachia requine Schott., Nerium indicum Mill., Ocimum sactum Linn., Thitonia diversifolia Gray, and Vallaris graba Ktze. Plants among which their extracts exhibited moderate attractive potency were Bixa orellana Linn., Curcuma comosa Roxb., Cymbopogon flexuosus Nee & Stend., Datura metel Linn., Elsholtzia blanda Benth., Holmoskioldia sanguine Retz., Homalomena sp., Lantana camara Linn., Melia azederach Linn., Momorica charantia Linn., Monstera deliciosa Liebm., Murraya paniculate Jack, Musa sapientum Linn., Nerium indicum Mill., Ocimum gratissimum Linn., Poinciana pulcherima Sw., Quisquallis indica Linn., Ruellia tuberose Linn., Terminalia catappa Linn., Thysanolaena maxima Kty., and Vallaris glaba Ktze. Among unidentified plants, Chang-Kan, En-Luang, and Kha-pa were included in this case.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 022, Issue 2, Apr 88 - Jun 88, Page 160 - 164 |  PDF |  Page