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Registros recuperados: 234
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2-Amino-4-Chloro-6-Methyl Pyrimidine 抑制氮肥硝化作用之研究(第二報) Taiwan Agricultural Research Institute
徐水泉; 溫西濱; S.C. Hsu; C.P. Wen.
[[abstract]]1.本試驗係根據第一報(農業研究第16卷第1期)之試驗結果繼續檢討AM對中壢粘土,香山砂土,屏東壤土等不同性質土壤中,硝酸化作用抑制效果及對水稻產量之影響。 2.據土壤實驗結果得知AM對氮素之硝酸化作用抑制效果受土壤性質之影響並不大而對砂土的效果較優。 3.盆栽試驗結果AM對容易發生脫氮作用環境下對水稻直播栽培稻谷產量之增收均有效果。 1. Following the preliminary report, the effect of A.M. was further studied on certain soils of varied properties. 2. The effect of A.M. was larger in sandy soil than in loamy or clayey soil. 3. A.M. may be advantageous for the cultivation methods under which denitrification is inevitable. (e. g., direct, sowing of rice under upland condition.)
Palavras-chave: [[classification]]10.
Ano: 1969
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BIOASSAY OF CERTAIN FUNGICIDES FOR THE RICE BLAST FUNGUS, PIRICULARIA ORYZAE Taiwan Agricultural Research Institute
S.C. Jong; C.C. Chine; C.L. Chu; 鐘順昌; 簡錦忠; 朱啟魯.
[[abstract]]1. In the present paper, certain resultant data of the laboratory experiments on evaluation of the fungicidal action of the certain commercial fungicides recently recommended for controlling the rice diseases in Japan against rice blast fungus are reported. 2. Fungitoxicity of the fungicides hitheto tested under the experimental condi-tion for controlling the rice blast fungus, is considered possibly due to the different-ces of durability and vapor action of them on the foliage. 3. It was proved in vitro that the organomercurials were distinctly efficacious than nonorganomercurials. 4. So far as the experimeits in vitro and in vivo were concerned, Mergon and Mei-ko-nung seemed could be determined as the practical fungicides. The efficacy of...
Palavras-chave: [[classification]]10.
Ano: 1963
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Chromatographic and Electrophorotic Separation of Lectin Preparation from Resistant and Susceptible Plants of Tomato to Pseudomonas solanacearum Taiwan Agricultural Research Institute
Chien-Yih Lin.
[[abstract]]Lectin preparations from wilt resistant and susceptible tomato plants to Pseudomonas solanacearum they have similar movement in Sephadex G-200 columns and SDS-polyacrylamide gels. Column fractions with highest protein content have the highest agglutination titers. Protein content, agglutination titers of column fractions, and the staining intensity of gels after electrophoresis are related to the susceptibility or resistance of the plants used for lectin extraction, inoculation of these plants, and the virulence of the Pseudomonas solanacearum isolate used for inoculation.
Palavras-chave: Pseudomonas solanacearum; Lectin; Chromatographic separation; Electrophoretic separation; [[classification]]10.
Ano: 1995
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Curvularia lunata菌之生理性質及其對水稻病原性之研究 Taiwan Agricultural Research Institute
朱啟魯; 簡錦忠; C.L. Chu; C.C. Chien.
[[abstract]]1.Curvularia lunata菌對水稻病原性,在葉片上形成褐色之紡錘形病斑,其分生胞子呈黑色,末端細胞較中間者為淡,具有三個隔膜,第二個細胞較其他細胞大而黑,且彎曲,以測微計測定100個胞子之結果,其平均值為24.3×10.8μ。 2.溫度試驗結果顯示適宜於本菌之發育溫度在30℃左右,溫度高達40℃或在5℃之低溫時,病菌則停止發育。當溫度由10℃~30℃時,C. lunata菌之發育隨溫度之增高而增長,但當溫度高於30℃以上時則本菌之發育隨溫度之增高而降低。本菌係一耐高溫菌,其致死溫度高達62℃。 3.C. lunata菌對pH值之適應範圍甚廣,由pH5.0~12.0均可生長。惟在12.0時則發育不良,至pH12.3時則本菌停止生長。對本菌最適宜之pH值為7.0~8.0。 4.最易為C. lunata菌利用之碳素源為Glucose, Fructose, Dextrin, Sucrose及Maltose,其次為Galactose, Lactose, Xylose及Raffinose,不易利用之碳素源有Inulin, Mannitol, Sorbose及Cellulose。 5.供試之氮素源中,Peptone, Asparagine, Asparticacid,及Glutamine對C. lunata菌之生長係良好之氮素源,其次為Urea及Leucine。最差之氮素源為NaNO3,Methionine及(NH4)2 SO4。 6.C. lunata菌由傷痍感染時發病率甚高,若以健全葉片接種時則感染率較低。故本菌對水稻之主要感染途徑可能係經由傷痍感染。 1. The fungus, Curvularia lunata, was pathogenic to rice plant....
Palavras-chave: [[classification]]10.
Ano: 1973
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Dodder Transmission and Microscopic Observations of Red-bird Cactus Witches’ Broom Disease Taiwan Agricultural Research Institute
I.L. Yang; 楊一郎.
[[abstract]]The red-bird cactus witches’ broom (RbWB) was transmitted from infected red-bird cactus to periwinkle by the dodder Cuscuta chinensis Lam. Free hand sections of RbWB infected periwinkle and red-bird cactus showed specific blue staining of Phloem cells with Dienes’ stain under a light microscope, and specific bright fluorescence of phloem tissues under a reflecting fluorescence microscope. Similar sections from healthy plants gave no reaction, which indicated the presence or infections of mycoplasma-like organisms in the phloem tissues of infected plants. On periwinkle, red-bird cactus witches’ broom induced a mild degree of bushy growth. 青龍簇葉病(Red-bird cactus witches’broom)可經菟絲(Cuscuta chinensis Lam.)媒介傳染而使長春草(Vinca rosea...
Palavras-chave: [[classification]]10.
Ano: 1989
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EFFECT OF CLOSTRIDIUM IN THE CONTROL OF FLAX FUSARIUM-WILT Taiwan Agricultural Research Institute
M. Chen; C.C. Tu; L.H. Jwo; 陳敏; 杜金池; 卓洛華.
[[abstract]]Bacteria were examined in two soils similar except that one was conducive while the other one suppressive to flax Fusarium-wilt. Bacterial flora differed markedly between these two soils. The former had a higher count of cocci and actinomycetes whereas the latter had a higher count of anaerobic bacteria and gram—negative rods. Several Clostridium spp. isolated from the suppressive soil were inhibitory to various formae of F. oxysporum including lini, pisi, niveum, lycopersici, and cubense race 1 and race T. In the pot test Fusarium-wilt was controlled by inoculating Clostridium sp. into moist soil kept at a neutral pH condition. 本研究之目的為比較亞麻立枯病(萎凋病)抑病土壤和導病土壤內細菌之分佈情形,並報導利用分離自抑病土壤之嫌氣性芽抱桿菌防治亞麻立枯病之盆栽試驗結果。導病土壤內以球菌和放射菌數量較多,而抑病土壤內則以革蘭陰性桿菌及嫌氣性芽抱桿菌居多。...
Palavras-chave: [[classification]]10.
Ano: 1976
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EFFECT OF HOT-AIR TREATMENT ON LIKUBIN. TRISTEZA VIRUS AND EXOCORTIS VIROID DISEASES OF CITRUS Taiwan Agricultural Research Institute
Chiou-hsiung Huang; 黃秋雄.
[[abstract]]Buds from likubin diseased citrus trees were grafted to rangpur lime seedlings. They were exposed to alternate temperatures of daytime ca. 40℃ for 16 hr and nighttime 30℃ for 8 hr for a period of 4 weeks or longer, such treated plants produced no likubin symptoms in new growth after two-year period of observation. All treated plants indexed in mexican lime seedlings showed tristeza virus symptoms. These results indicated that the main component of likubin pathogen was inactivated, hut the tristeza virus was not completely inactivated. Young shoots from tristeza-infected mexican lime seedlings which had been placed at 40/30℃ for 15 weeks or 39-45/29-33℃ for 10 weeks could he free from tristeza virus. Temperatures at 38/28℃ was not sufficient for...
Palavras-chave: [[classification]]10.
Ano: 1978
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Effects of inoculum concentrations on the resistance of peanuts to Puccinia arachidis Speg. Taiwan Agricultural Research Institute
Y.S. Lin; 林益昇.
[[abstract]]Four hundred and sixty-one accesions of peanuts were screened for resistance to peanut rust. Three accessions, P. I. 314817, P. I. 259747 and P. I. 315608, showed slow rusting under natural environments in Taiwan. When these accessions were screened in a rust nursery with an inoculum density higher than that in the natural field, the P. I. 314817 and P. I. 259747 became susceptible while P. I. 315608 remained resistant. Heavy infection occurred on all three accessions when they were inoculated with a spore suspension (200 mg of uredospores /plant) plus a wetting agent (Tween 80) in growth chamber. In another inoculation tests, each of the three accessions at 90 days old was inoculated with inoculum densities ranged from 2 to 200 mg of...
Palavras-chave: [[classification]]10.
Ano: 1981
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Etiological Studies on the Banana Bunchy Top Taiwan Agricultural Research Institute
I-lang Yang; Ting-chin Deng; Shu-ya Wu; 楊一郎; 鄧汀欽; 吳淑雅.
[[abstract]]Hand-section of tissues of bunchy top diseased banana plants were examined under a reflecting fluorescence microscope. A distinctly specific bright fluorescence was observed in these phloem tissues of lamina veins, midribs, sheaths, corms and roots. Symptomless suckers taken from infected stool also gave a weak fluorescent reaction. These specific reactions were phloem-limited, and were not observed in the healthy banana plants. Leaf sections prepared from both diseased and healthy plants of banana were also examined under light microscope after treatment with Dienes’ stain. No specific blue staining was noticed in these phloem tissues. These results indicated that the banana bunchy top disease is probably not of a mycoplasmal etiology and that...
Palavras-chave: [[classification]]10.
Ano: 1986
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FIELD TESTS WITH THIMET ON COTTON INSECT CONTROL IN TAIWAN Taiwan Agricultural Research Institute
Y.P. Tsai; C.H. You; 蔡雲鵬; 游江海.
[[abstract]]These experiments were carried out during 1960 in Tainan Fiber Crops Experiment Station, Taiwan Agricultural Research Institute, Taiwan, Republic of China. Ten per cent Thimet granules was applied by in-furrow at the rate of 1 (A treatment) and 2 (B treatment) of toxicant per acre and side dressing at the rate of 2 (C treatment) and 4 pounds (D treatment) of toxicant per acre after 42 days planting. Side dressing treatment was added at the rate of 4 pounds of toxicant per acre after 73 days planting on the plot of A treatment. Thimet furrow treatment controled leafhopper significanlly during 53 days and aphid during 72 days. Thiment side dressing treatment gave good leafhopper and aphid control during 49 days and it elongated about 80 days...
Palavras-chave: [[classification]]10.
Ano: 1961
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HEAT INDUCED GERMINATION OF BASIDIOSPORES OF AGARICUS BISPORUS (LGE.) SING Taiwan Agricultural Research Institute
N. Lin; K.J. Hu; H.T. Hsu; 林蘭; 胡開仁; 徐惠廸.
[[abstract]]Induced spore germination of A. bisporus as affected by heat treatment was studied. The optimum temperature for the stimulation of basidiospore germina-tion was 45°C. The time required for the treatment to obtain better germination was also studied. For spore germination 10 to 50 minutes of heat treatment was considered effective. The optimum temperature for incubation of the heat-treated basidiospores was 28°C. The highest percentage of spore germination thus obtained was 25 per cent. 1. 本試驗應用溫度處理洋菇孢子,探求處理孢子發芽最適合之溫度與時間,俾能提高洋菇孢子之發芽率,進而應用於單孢分離,選種培養與育種工作。 2. 洋菇孢子發芽之溫度自40℃到55℃不等,而以45℃ 為最適溫度。 3. 洋菇孢子在45℃之溫度下處理5分鐘到90分鐘不等,均可刺激其發芽,其中以10分鐘到50分鐘為最佳,而且具有同樣效果。 4. 最適洋菇孢子發芽之培養溫度為28℃,最低極限為18℃,最高極限為34℃。 5. 洋菇孢子經45℃處理30分鐘後培養於28℃下,可將其發芽率提高達百分之二十五。
Palavras-chave: [[classification]]10.
Ano: 1967
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Host Responses of Peanut Witches’ Broom Disease Taiwan Agricultural Research Institute
I-lang Yang; 楊一郎.
[[abstract]]The results confirmed that the peanut witches’ broom disease (Pn WB) could be transmitted to peanut, tomato, potato, alyce clover, purple bean, globe amaranth, periwinkle, I pomoea obscura and I pomoea triloba by insect vector Orosius orientalis, but no infection was found in sweet potato, loofah, cucumber, strawberry, water spinach, balsam pear, paulownia, creeping wood-sorral, chinese morning-glory, I pomoea pescaprae, Chenopodium amaranticolor and C. quinoa. The PnWB affected plants developed typical witches’ broom symptoms, and the symptoms of PnWB on tomato plants resembled those of tomato big bud or witches’ broom disease. The sieve elements of PnWB infected plants were stained blue with Dienes’ stain in sections of phloem tissues by...
Palavras-chave: [[classification]]10.
Ano: 1985
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Leersia hexandra-A HOST PLANT OF BACTERIAL LEAF BLIGHT Taiwan Agricultural Research Institute
Chi-lu Chu; Chin-chung Chien; 朱啟魯; 簡錦忠.
[[abstract]]In attempt to find alternative host plants of Xanthomonas oryzae, five paddy weeds, Leersia hexancira, Cynodon dactylon, Brachiaria mutica, B. subqudripara and Echinochloa crusgalli were tested. Among them Leersia hexandra was found to be the weed hosto f this bacteria. The symptom on leaf blade of L. hexandra usually begin at the main leaf veins after inoculation with clipping method. As the disease advances, the lesion turns clove brown in color and the region near the healthy part shows water soaking. 為尋求稻白葉枯病菌(Xanthomonas oryzae)中間寄主,曾以Leersia hexancira (李氏禾),Cynodon dactylon (狗牙根),Brachiaria mutica(巴拉草),B. subqudripara (四生臂形草)及Echinochloa crusgalli等五種雜草測定其對稻白葉枯病之反應。結果發現李氏禾有罹病之現象,有餘四種雜草未見顯現病徵。 於李氏禾植株上經剪葉法(Clipping...
Palavras-chave: [[classification]]10.
Ano: 1975
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Mycophasma-like Organisms Assoeiated With Witches’ Broom of Wild Balsam Pear in Taiwan Taiwan Agricultural Research Institute
I-Lang Yang; Moh-Jih Chen; Shuang-Ming Wang; 楊一郎; 陳脉紀; 王雙明.
[[abstract]]The witches’ broom disease on wild balsam pear was newly found in an isolated areas near Shui-li, Nan-tou county in the central Taiwan in 1984. The diseased plants showed typical witches’ broom symptoms comprising bushy little leaves, green flowers and abnormal conical shoots. Numerous pleomorphic bodies, characteristic of mycoplasma-like organisms (MLO), were observed in veinal sieve elements of the diseased leaves under electron microscopy. They were spherical, ovoid or ellipsoidal about 110 to 740 nm in diameter. No such MLO bodies were found in the healthy plant. The stem and leaf sections were observed directly under a reflecting fluorescence microscope and also examined under light microscope after treatment with Dienes’ stain. The...
Palavras-chave: [[classification]]10.
Ano: 1987
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Mycoplasma-like Organism Associated with Eggplant Phyllody in Taiwan Taiwan Agricultural Research Institute
I-Lang Yang; Moh-Jih Chen; 楊一郎; 陳脉紀.
[[abstract]]The phyllody of eggplant (Solanum melongena) was a newly recorded disease found in the Penhu Islands in Taiwan in 1986. The diseased plants showed the yellows symptoms comprising green flower and malformation of leaves. The disease agent was transmitted by grafting. Numerous pleomorphic bodies characteristic of a mycoplasma-like organism (MLO) were observed in veinal sieve elements of the diseased leaves under electron microscopy. They were spherical, ovoid, or ellipsoidal, and about 110 to 800nm in diameter. No such MLO bodies were found in the healthy plant. The stem and leaf sections were also examined under the light and fluorescent microscope with Dienes’ staining, DAPI technique and direct fluorescent detection method, respectively. The...
Palavras-chave: [[classification]]10.
Ano: 1988
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NITROGEN NUTRITION OF AGARICUS BISPORUS-I. FORM OF INORGANIC NITROGEN UTILIZED BY AGARICUS BISPORUS Taiwan Agricultural Research Institute
H.T. Hsu; K.J. Hu; 徐惠廸; 胡開仁.
[[abstract]]The effect of three inorganic forms of nitrogen, namely nitrates, nitrites and ammonium salts, upon the growth of Agaricus bisorus was studied. No growth was observed when nitrates or nitrites were supplied as the sole source of nitro-gen in a synthetic solution. The fungus utilized ammonium nitrogen within a limited concentration. Dry weight of mycelial mats of Agaricus bisporus decreased when the concentration of ammonium nitrogen increased beyond 1000 mg/l. 1. 本文詳述三種無機態氮素對洋菇生長之情形。 2. 硝酸態及亞硝酸態的氮不能供洋菇生長。 3. 銨鹽類的氮為洋菇之良好氮素源。 4. 銨鹽類的氮在800 mg/l之濃度時最適合洋菇之生長。 5. 銨鹽類的氮超過1000 mg/l時能減低洋菇之生長。
Palavras-chave: [[classification]]10.
Ano: 1967
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NITROGEN NUTRITION OF AGARICUS BISPORUS-II. UREA AS THE NITROGEN SOURCE OF AGARICUS BISPORUS Taiwan Agricultural Research Institute
H.T. Hsu; K.J. Hu; 徐惠廸; 胡開仁.
[[abstract]]A comparism of the utilization of nitrogen sources from ammonium sulfate and urea by Agaricus bisporus was investigated. Better response in yield of the fungus from urea nitrogen was observed. The pH of the culture solution was also noted. An increase of pH of the culture solution was obtained when the urea served as nitrogen source. In case ammonium sulfate was used, the pH of the culture solution decreased. 1.本文詳述尿素及硫酸銨對洋菇生長之比較。 2.尿素係供洋菇生長之良好氮素源。 3.尿素對洋菇之生長比硫酸銨更佳。 4.洋菇生長於含尿素之合成培養基時,培養液逐漸呈微鹼性或中性。 5.洋菇生長於含硫酸銨之合成培養基時,培養液逐漸呈酸性。
Palavras-chave: [[classification]]10.
Ano: 1967
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Oospore germination of Peronophythora litchii Taiwan Agricultural Research Institute
Pao Jen Ann; Ko, W. H..
[[abstract]]This germination in the fungus, causing fruit rot of Litchi chinensis, was 30-35% in distilled water but most of the oospores produced short germ tubes which did not develop further. C. 2% produced 1 or 2 sporangia on each germ tube. Sometimes germ tubes penetrated the oogonium wall but more frequently they emerged through the oogonium stalk and antheridium. Occasionally up to 10 germ tubes emerged from a single oospore, but in most cases only 1 produced sporangia, some of which released differentiated zoospores after chilling. Attempts to establish colonies from the germinating oospores were not successful. These results supported previous reports [RPP 58, 99] that the fungus is a transitional sp. between Phytophthora and Peronospora.
Palavras-chave: [[classification]]10.
Ano: 1980
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Physiologic Races of Helminthosporium turcicum in Taiwan Taiwan Agricultural Research Institute
C.C.Yeh; A.H. Tsai; 葉忠川; 蔡阿輝.
[[abstract]]Experiments were conducted to identify the races of Helminthosporium turcicum, the northern corn leaf blight fungus, and their distribution in Taiwan, and to explore their reaction in the currently grown maize cultivars. Leaf samples of northern leaf blight were collected from various growing areas and vane-ties/lines in 1987. Inoculum of a single lesion origin was considered an isolate. Several isolates were obtained from each collection site and/or variety/line. According to the reactions of each isolate on the differential varieties, three races of H. turcicum, namely race 1, 2, and 3, the same as in the U. S., were reported for the first time in Taiwan. Race 1 existed in Hualien and Taitung Counties (eastern Taiwan), race 2 in County...
Palavras-chave: [[classification]]10.
Ano: 1988
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PHYSIOLOGIC RACES OF PELLICULARIA SASAKII IN TAIWAN Taiwan Agricultural Research Institute
C.C. Chien; S.C. Jong; 簡錦忠;鐘順昌.
[[abstract]]Sheath blight disease incited by Pellicularia sasakii on rice plants is of the second importance to blast in distribution, as well as damage for the rice culture in Taiwan (Hashioka 1951). Under the present situation in Taiwan, the japnica type of rice is more susceptible. Yield loss from this disease is around 14-17% (Lo 1961). According to Lo (Personal communication), the loss due to the blast disease might have been exceeded by the scierotial sheath blight which has become increasingly prevalent in recent years (Chiu 1962). Sawada (1912) stated that the fungus might be able to infect a diverse number of plants, 47 species belonging to 4 families in Taiwan; 60 species belonging to 16 families in Japan. Matsumoto (1934) reported that there...
Palavras-chave: [[classification]]10.
Ano: 1963
Registros recuperados: 234
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