scholarly journals Changes of dipteran pests in agricultural, horticultural and ornamental plants during the 20th century

Author(s):  
Hana Šefrová

Results of an analysis of dipteran pests composition and changes of their importance in agricultural, horticultural and ornamental plants during the 20th century are given. Even 89 Diptera species have been registered as pests of these plants (1.1 % of all species known in the Czech Republic). Of these ca 14 (16%) species caused regular and important and other 23 (26%) species occasional damages. The remaining 52 (58%) species are unimportant, local and sporadic pests. Only small changes (10% maximally) in the species composition of more important dipteran pests have been registered during the century.

Author(s):  
Hana Šefrová

Results of an analysis of coleopteran pests in agricultural, horticultural and ornamental plants during the 20th century are given. About 115 Coleoptera taxa were registered as pests of these plants (1.9% of all species known in the Czech Republic). Of these ca 20-25 species caused regular and important and other 40 species occasional and local damages. The remaining (ca 50-55) species appeared to be economically nearly or quite irrelevant. Only small changes in the composition of important coleopteran pests were registered during the century.


2017 ◽  
Vol 48 (2) ◽  
pp. 70-75
Author(s):  
I.A. Kyriánová ◽  
J. Vadlejch ◽  
I. Langrová

Abstract This epidemiological study monitored the occurrence of the coccidia genus Eimeria and their species composition over a oneyear period at an organic sheep farm in the Czech Republic. Individual faecal samples were collected from thirty lambs and thirty ewes once a month throughout the whole survey. As a result, 348 and 333 samples from ewes and lambs respectively were evaluated using the faecal flotation technique. The overall prevalence of eimeriosis was 75.7% and 54.0% for lambs and ewes respectively. Four Eimeria species (E. ovinoidalis, E. crandallis/weybridgensis, E. parva, and E. intricata) were identified in both, lambs and ewes, during this survey. The most prevalent species was E. ovinoidalis, with an overall prevalence of 84% in ewes and 85% in lambs, followed by E. parva and E. crandallis/weybridgensis. The oocysts faecal output was seasonal. The highest oocysts per gram levels were detected in February (139 000) and May (250 000) in ewes and in February (1 949 900), March (326 000), and May (187 700) in lambs. The intensity of Eimeria infection differed significantly (P < 0.0001) between ewes and lambs during the monitored period.


Biologia ◽  
2008 ◽  
Vol 63 (6) ◽  
Author(s):  
Jan Šťastný

AbstractThe distribution and ecology of desmids in wetland habitats in the Czech Republic were studied during 2003–2007. Samples were taken also from various aerophytic habitats and temporary pools thet had not been sufficiently studied before. Altogether 110 desmids taxa were found in 31 samples which were ordinated on the basis of their desmid species composition using a multivariate statistic method. The discussion focuses on the most interesting findings and on the factors that influence the distribution of desmids in different types of aerophytic habitats.


2013 ◽  
Vol 49 (No. 4) ◽  
pp. 155-164 ◽  
Author(s):  
M. Mrázková ◽  
K. Černý ◽  
M. Tomšovský ◽  
V. Strnadová ◽  
B. Gregorová ◽  
...  

Beginning in 2006, a survey of two related Phytophthora species, P. multivora and P. plurivora, was performed in the Czech Republic. Both pathogens were distributed throughout a broad range of environments including forest and riparian stands and probably became naturalised in the country. The two species differed in their frequency and elevational distribution. P. multivora was less frequent, but commonly occurred in the lowest regions such as Central Bohemia and South Moravia, i.e. areas which generally exhibit a high level of invasion. This species was isolated primarily from Quercus robur and found to be involved in oak decline. Moreover it poses a high risk to other forest trees. P. plurivora was distributed in a broad range of elevations over the entire area. A substrate specificity was detected in P. plurivora &ndash; the isolates from forest trees were more aggressive to such trees than the isolates from ericaceous ornamental plants. &nbsp;


2012 ◽  
Vol 57 (12) ◽  
pp. 2550-2567 ◽  
Author(s):  
JINDŘIŠKA BOJKOVÁ ◽  
KLÁRA KOMPRDOVÁ ◽  
TOMÁŠ SOLDÁN ◽  
SVĚTLANA ZAHRÁDKOVÁ

Author(s):  
J. Cajthaml ◽  
P. Tobiáš

The ”Czech Historical Atlas” project is a part of the NAKI II programme of the Czech Ministry of Culture and aims to create the following two main outputs: a printed atlas of the Czech history in the 20th century and an electronic map portal on the Czech history. This paper is focused on the latter mentioned output and specifically on the design of 3D scenes which should supplement the 2D map content. Currently existing literature is briefly reviewed and the procedural modelling is found to be suitable for the needs of urban landscape reconstruction. Furthermore, available data sources in the Czech republic are discussed and important aspects of modelling are presented.


2017 ◽  
pp. 367-399
Author(s):  
Rudolf Krajíc ◽  
Zdeněk Měřínský ◽  
Pavel Vařeka

2021 ◽  
pp. 51-61
Author(s):  
Anikó Radvánszky

The experience of “transfrontality”, in the concrete and figurative sense of the word, is always strongly dominant in a region where ethnic and national borders have always been separated, in an area where, throughout its history, but especially in the 20th century, in re- and re-emerging units, individual, community, or national identities had to be conceived according to new and new points of reference. The meaning of the concept of Central Europe is very variable, its use is diverse; there are several interpretations of the region based on geographical, political and cultural aspects. It is an indisputable fact that Central Europe today is a literary concept rather than an economic, political and spiritual reality, a concept that is kept alive by writers such as Milosz from Poland, Kundera from the Czech Republic, Miklós Mészöly from Hungary. In my study I compare two literary works, Danubio (Danube) by Claudio Magris and Hahn-Hahn grófnö pillantása (The Glance of Countess Hahn-Hahn) by Péter Esterházy that create and approach the imaginary construction called Central Europe in their own way. Both travel novels capture the trip on the Danube and the experience of transfrontality


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