Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen)最新文献_第10页

The pycnidium ontogeny of Stagonospora nodorum, the glume blotch agent of wheat. 小麦颖片斑病致病菌结节Stagonospora nodorum的寄主作用。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

M N Douaiher, P Halama

引用次数: 0

Multiple alignment of sequences and structures. 序列和结构的多重比对。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

Ivo Van Walle, Lode Wyns

引用次数: 0

Impact of close habitat on the entomological diversity and abundance in carrot open fields. 封闭生境对胡萝卜露地昆虫多样性和丰度的影响。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

P Colignon, C Gaspar, E Haubruge, F Francis

引用次数: 0

Biological control of soybean damping-off by antagonistic rhizobacteria. 拮抗根瘤菌对大豆受潮的生物防治。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

A Sharifi Tehrani, A Zebarjad, Gh A Hedjaroud, M Mohammadi

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Soil persistence and metabolism of iodosulfuron in winter wheat crops. 冬小麦土壤对碘磺隆的持久性和代谢。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

J Rouchaud, O Neus, H Eelen, R Bulcke

{"title":"Soil persistence and metabolism of iodosulfuron in winter wheat crops.","authors":"J Rouchaud, O Neus, H Eelen, R Bulcke","doi":"","DOIUrl":"","url":null,"abstract":"The sulfonylurea herbicide iodosulfuron 1 has been applied post-emergence at the dose of 10 g a.i. ha-1 on winter wheat crops grown on sandy-loam (Melle) or on clay soils (Leke, Gistel and Zevekote). The dissipation of iodosulfuron in soil followed a first order kinetics. After the application of iodosulfuron at Melle at the beginning of April 2000, the soil half-life of iodosulfuron in the 0-10 cm surface soil layer was 60 days. At the end of September 2000, i.e. one month after the winter wheat harvest, only 8% of the applied dose of iodosulfuron remained in soil as iodosulfuron itself. At the mid of November, iodosulfuron 1 was no more detected in the 0-10 cm surface soil layer. From the beginning of May till the end of July 2000, low concentrations of iodosulfonamide 2 and of iodosaccharin 3 were observed in the 0-10 cm surface soil layer, their maximum concentrations being 0.7 and 1.5 micrograms of equivalents of iodosulfuron 1 kg-1 dry soil, respectively. At the end of September, the metabolites 2 and 3 were no more detected in soil. At Leke, Gistel and Zevekote, iodosulfuron was applied at the beginning of May 2001, and its half-life in the 0-10 cm surface soil layer was 44, 30 and 35 days, respectively. The later application of iodosulfuron and the higher soil pH (about 8) at Leke, Gistel and Zevekote should explain the soil half-lives lower than at Melle (soil pH 6.2). In all the trials and since the treatment till the mid of November, iodosulfuron 1 and its metabolites 2 and 3 were not detected in the 10-15 and 15-20 cm surface soil layers.","PeriodicalId":85134,"journal":{"name":"Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen)","volume":"67 3","pages":"393-9"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22341647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of pummelo (Citrus grandis (L.) Osbeck) cultivars using isozyme electrophoresis. 柚(Citrus grandis (L.))的鉴定利用同工酶电泳。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

Thi Thanh Thuy Phan, Phuoc Dang Nguyen, Thi Mai Anh Nguyen

引用次数: 0

Relationship between intra- and extracellular dextran dextrinase from Gluconobacter oxydans ATCC 11894. 氧化葡萄糖杆菌ATCC 11894胞内和胞外葡聚糖糊化酶的关系。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

M Naessens, R Vercauteren, E J Vandamme

引用次数: 0

Barley leaf stripe disease. 大麦叶条病。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

J Zad, M Aghakhani, R Etebarian, M Okhovat

{"title":"Barley leaf stripe disease.","authors":"J Zad, M Aghakhani, R Etebarian, M Okhovat","doi":"","DOIUrl":"","url":null,"abstract":"Leaf stripe is one of the most important diseases of barley in Iran especially in Gorgan, Mazandran and near Tehran (Varamin). Most obvious symptoms of the disease are described. Long pale or yellow stripes become darker as the fungus sporulates on the leaf surface. Infected plants usually are stunted and produce sterile spikes, rarely a few seeds are produced. Infected spikes and late-forming tillers may produce fertile spikes. The fungus is seed brone and survives in the outer layers of infected seed. To study the seed-borne disease, we have used the different methods (ISTA). Coleoptiles of seedlings are infected by the fungus under cool, moist conditions, a soil temperature below 15 degrees C is necessary for seed infection. The fungus penetrates through coleoptiles and grows systemically within the plant, produces toxin and kills cells and discolors leaf tissue between veins, thus causing striped lesions. When conditions are wet or humid, spores are produced on the surface of leaves at above the time spikes of healthy plant. Morphological characteristics of the vegetative and reproductive structures of the fungus show that it is Drechslera graminea (Rabenh) Shoemaker.","PeriodicalId":85134,"journal":{"name":"Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen)","volume":"67 2","pages":"279-81"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22345658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection of resistance to fungicides, mating types and fitness of Phytophthora infestans in Hebei, China. 河北省病原菌对杀菌剂的抗性、配种类型及适合度检测。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

Wen-Qiao Wang, Zhi-Qiang Ma, Xiu-Ying Han, Xiao-Feng Zhang, Shu-Long Chen

{"title":"Detection of resistance to fungicides, mating types and fitness of Phytophthora infestans in Hebei, China.","authors":"Wen-Qiao Wang, Zhi-Qiang Ma, Xiu-Ying Han, Xiao-Feng Zhang, Shu-Long Chen","doi":"","DOIUrl":"","url":null,"abstract":"In vitro, isolates resistant to metalaxyl (M) and oxadixyl (O) of Phytophthora infestans were 11.2% of 62 isolates from potato and tomato in Hebei Province, mean resistance factor was 15,022 fold and 24,733 fold, respectively, no isolates resistant either to cymoxanil (C) or to dimethomorph (D) were detected. On the other hand, in vivo, isolates resistant to M and O were 29.0% and 32.7%, respectively, among 217 isolates from potato plants in Weichang and Chongli, Hebei, only one isolate resistant to M and O was found among 88 isolates from tomato plants in Xushui, Hebei. Among 73 isolates from potato in Weichang and Chongli, 6 isolates with A2 mating type were 8.2%, 3 A2 isolates resistant to metalaxyl and oxadixyl. 3 A2 isolates were 6.8% of 44 isolates from tomato in Xushui. Cross resistance in Phytophthora infestans was confirmed between M and O, but no cross resistance between C or D and M or O. The field isolates resistant to M and O were outstandingly fitter than sensitive or intermediate ones, mainly due to stronger sporulation capacity of the field isolates.","PeriodicalId":85134,"journal":{"name":"Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen)","volume":"67 2","pages":"307-14"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22345662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lessons from the year 2001 Mycosphaerella graminicola epidemic on winter wheat in Belgium. 2001年比利时冬小麦谷杆菌流行的教训。

Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) Pub Date : 2002-01-01

F Calay, L Coquillart, C Lucas, D Lemaire, B Bodson, J M Moreau, H Maraite

{"title":"Lessons from the year 2001 Mycosphaerella graminicola epidemic on winter wheat in Belgium.","authors":"F Calay, L Coquillart, C Lucas, D Lemaire, B Bodson, J M Moreau, H Maraite","doi":"","DOIUrl":"","url":null,"abstract":"Infection by Mycosphaerella graminicola (anamorph Septoria tritici) was monitored between April and July 2001 on F6 to flag leaf in 11 farmers' fields or fungicide trials. Data were analysed by mean of the decision support system \"Proculture\" which links an automatic weather station of the PAMESEB network to a particular field, simulates plant development with adjustment by one phenological observation during the stem elongation and analyses superposition of emerged leaves and infection events (http://www.fymy.ucl.ac.be/proculture). Several climatic events favourable for the infection and dissemination of M. graminicola occurred between October 2000 and March 2001 and allowed build up of a large amount of inoculum on the lower leaves at the end of the winter. The start of stem elongation was associated with frequent rainy periods during April, causing early infection of F5, F4 and up to F3 in some precocious fields. Dry weather with only a few local showers during most of May and June slowed down spread of infection to the upper leaves, leading to absence of M. graminicola infection of the flag leaf in 9 out of the 11 fields. Yield increase by a single fungicide spray ranged from 800 to 2200 kg/ha. A second treatment was cost effective in none of the fields. The interest and limitation of the decision support system for understanding M. graminicola epidemic and for guiding decision on spray timing are discussed.","PeriodicalId":85134,"journal":{"name":"Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen)","volume":"67 2","pages":"197-204"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22345692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0