1,720,977 research outputs found
(3(4):23-27)Investigations on Seed Treatment of Peanut for Control of Sclerotial Wilt
No full textThe peanut wilt caused by Sclerotium rolfsii Sacc was widely distributed over the peanut growing regions throughout this Island. Approximately 9-15% of the plant wilted in the field during July to September yearly. In order to improve the seedling emergance an effort was made, to find some dependable seed protectants which could be recommended for use with this crop. This paper presents the preliminary results on the effectiveness of severals seed protectants on the seedling emergance of peanut in compost, infested with S. rolfsii, in Taipei, Taiwan,
From the results of seed germination obtanied in greenhouse and field trials it was concluded that majority of fungicides used in this experiment were proved to be of some value and may be expected to improve the stands after treatment. Of the materials used, Spergon at 0.8 per cent and Agrosan GN at 0.8 per cent dosages by weight of seed showed the most promice while Arasan SF at 0.4 per cent the next.
The effect of Phygon. XL, Femide and Phygon at all dosages were not so significant in the greenhouse trial as compared with the field trial but in the condition of the former the percentage of seed germination tends to increase toward the higher dosage.
New Improved Ceresan retarded seed germination when its dosage is over 0.2 per cent but the percentage of seed germination tends to increase as its dosage decreased. Then in conclusion New Improved Ceresan would have its fungicidal value for this crop if lower dosage was recommended
(20(3):54-65)STUDIES ON THE BUBBLE DISEASE OF CULTIVATED MUSHROOM
No full text為明瞭洋菇褐痘病病菌之生理性質及本病之有效防治方法而學行本試驗。玆將本試驗所得之結果摘要如下：
洋菇褐痘病菌在培養基上的生長優劣，以燕麥培養基為最佳，酵母抽出液次之，其餘順序為堆肥抽出液Czapek Agar，馬鈴薯洋菜，麥芽抽出液等培養基。增殖培養源以小麥為最佳，其次是玉米，但堆肥則不能生長。在溫度適應方面，以24℃生長最佳，對高溫之抗力甚弱，在55℃下乾熱4分鐘，或濕熱1分鐘即死亡。對不同pH值之生長差異，到對酸性之適應力較強，即至pH 4.4生長尚頗為良好，而對鹼性之適應力較弱，在pH 8.4時菌絲生長即甚微弱。
藥劑防治以Dithane A-40及Dithane Z-78為有效藥劑，Dithane A-40 1,000倍稀釋液防洽效果最佳，每坪地每天施用1公升，連續兩次，藥害輕，且藥效持續力亦較長，Dithane Z-78 600倍每坪地施藥一公升，3天施藥一次，連續三次，效果與Dithan A-40 1,000倍相近，但藥害大，小菇菇體變黃。
Experiments were made to determine some of the causal fungus of bubble disease and find an effective control method. The results are summarized as follows:
The mycellial growth of the fungus was found best on oatmeal agar and in decreasing order on compost extract agar, Czapek agar, potato dextrose agar, and malt extract agar. As for the grain media, the pathogen grow satisfactorily on wheat, and less so no corn. 25℃ was the optimum temperatures for mycelial growth, the fungus did not tolerate high temperature and was killed at 55℃ after 4 minutes and 1 minute respectively where expored to dry heat and wet heat. The pathogen growth reacted differently in various pH ranges. In general, it had a wide pH range for growth a considerable growth could occur at pH 4.4 but only very restricted growth occurred at pH 8.4.
Dithane A-40 and Dithane Z-78 were found effective in controlling the fungus. Less phytotoxicity and longer effect resulted from spraying 1 liter of dilute Dithane A-40 diluted 1:1,000 per pin on two successive days. Than with 3 application of 1 liter of dilute Dithane Z-78, 600X, per pin at three day intervals. Phytotoxicity was exhibited in the latter case by producing yellow mushroom buttom
(1(4):1-10)The Effects of Granosan Treatment for the Control of Some Seed-borne Diseases of Rice
No full text1．榖仁樂生溶液浸種一小時，其濃度爲0.05%時，可消滅稻熱病病菌；0.07%時可使胡麻斑病及馬鹿菌病病原菌致死。田間試驗結果本藥液浸種消毒，防除馬鹿苗病有顯著之效果。
2．根據病斑消毒試驗結果，0.3%濃度之藥液可消滅病斑組織內之病原，又用以噴霧稻株亦得相同之結果。
3．浸種藥液之濃度，不論0.07%或0.1%，對種子發芽均有良好結果，對幼苗生長情形，則標準區與處理區間無顯著之差異。
4．穀化樂生溶液浸種消毒較本省過去所用之Uspulun或甲醛溶液爲簡便，因藥劑用量少，浸潰時間短是其長處。1. Granosan water solution was recommeded as seed disinfectant for the control of some seed-borne disesaes of rice. One hour of immersion at the concentration of 0.05 per cent was found effective for killing Piricularia Oryzae and of 0.07 per cent has also been productive of good result for controlling Helminthos porium oryzae and Gibberella Fujikuroi. While under field erperiment the latest ones produced the most significant benefit.
2. The internal mycelium of P. oryzae and H. oryzae were both killed as soon as the affected leaf lesions have been swiftly washed through the Granosan solution at the concentration of 0.3 per cent. Similar results were obtained by spraying on ”blast” affected plants.
3. Whatever the concentration of Granosan solution at 0.07 or 0.1 per cent all the treated seeds shown better germination without any toxical injuries
(10(1):35-40)SOYBEAN SPRAYING EXPERIMENT FOR RUST DISEASE CONTROL
No full text本省大豆栽培事業年來由於農藝學者之研院及有關當局之倡導故栽培面積日趨廣大，為配合此項工作著者等曾於四十八年從事大豆病害調查，經獲悉若干病害甚為普遍流行，其中影響產量最大者，首推銹病，復據調查終果，目前在本省各地推廣之品種均遭感染，故於四十八年開始分別在花蓮屏東等地進行藥劑防治試驗，本試驗目的在於檢討供試藥劑之防病效果，適當撒藥時期及防治處理與大豆產量之影響。本試驗承蒙農復會惠予資助，使此項工作得能順利完成。本文先就花蓮區試驗結果作分析討論，試驗期中荷蒙花蓮區農業改良場許兩順先生鼎力協助，於此謹詰 謝忱。
Soybean rust caused by Phakopsora Pachyrhizi SYDOW is one of the destructive disease found throughout the growing areas. A spraying experiment for the disease control was conducted at Hwa Lien Experiment Station from 1959 to 1960 including three crops of soybean i.e. fall, spring and summer.
The purpose of the experiment is to determine the possible control with fungicides and their effectiveness as well as the timing of spray.
The fungicides used for this experiment were Ditliane M-22, Dithane Z-78, Dithane
Z-78 plus Wettable sulfur, 0-3818-B and Bordeaux, mixture which were applied at 7 days interval. A total of 5 applications of each testing fungicides were taken during the growing period. The first application varied differently wih the number of days after plantihg; they werethe 28th, 35th, 42th, and 49th respectively . Evidences indi - cated that the disease was well checked by either one of the fungidide which has been tested. The profitable time of the first spraying to control rust disease depended upon different crop of soybean. For protection of the spring crop, the first spraying should be initiated at the 35th day, but it is advisable to initiate the spraying program at the 49th day for both summer and fall crops. Yields of the crop were prominently increased except the fall crop which was insigniflcant because the weather was the limitting factor upon yields.
Among the testing fungicides, Dithane M-22 showed best effect to control rust disease while Dithane Z-78, Dithane Z-78 plus Wettable sulfur, Bordeaux mixture came next in order. 0-3818-B a new fungicide produced by Rohm & Haas Co., at the rate of 200 grams per 100 liters has its advantage of rust control, but it produced chemical injuries to the leaves after application. The phytotoxicity tended more serious as the rate of the chemical increased. For the best control soybean rust, it is suggested to apply either Dithane M-22 or Dithane Z-78 at the rate of 300 grams per 100 liters of water
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
