scholarly journals Influence of application term on effectiveness of some insecticides against brassica pod midge (Dasineura brassicae Winn.)

2008 ◽  
Vol 43 (No. 2) ◽  
pp. 57-62 ◽  
Author(s):  
R. Pavela ◽  
J. Kazda ◽  
G. Herda
Keyword(s):  
Czech Republic ◽  
Oilseed Rape ◽  
Winter Oilseed Rape ◽  
The Czech Republic ◽  
Lambda Cyhalothrin ◽  
Full Flowering ◽  
Dasineura Brassicae

In 2005 we determined the effectiveness of two preparations against gall pod midge in dependence on different terms of application, i.e. at full flowering (BBCH 65) and after flowering (BBCH 67) of winter oilseed rape. The tests were carried out at three localities in the Czech Republic, and the two preparations used were Calypso 480 SC (a.i. thiacloprid) and Karate Zeon 5CS (a.i. lambda-cyhalothrin). It was found that applying the preparations at BBCH 67 was significantly more effective than treatment at BBCH 65.

scholarly journals Influence of selected fungicides registered in the Czech Republic for winter oilseed rape on in vitro Sclerotinia sclerotiorum mycelial growth

2018 ◽  
Vol 54 (No. 2) ◽  
pp. 101-110 ◽  
Author(s):  
Poslušná Jana ◽  
Plachká Eva ◽  
Mazáková Jana
Keyword(s):  
Czech Republic ◽  
Oilseed Rape ◽  
Sclerotinia Sclerotiorum ◽  
Mycelial Growth ◽  
Winter Oilseed Rape ◽  
Baseline Sensitivity ◽  
The Czech Republic ◽  
Dose Rates ◽  
The Mean

The baseline sensitivity of 55 isolates of Sclerotinia sclerotiorum, collected from oilseed rape in 6 regions of the Czech Republic, to selected fungicides was determined during the period 2013–2015. One single-component fungicide – Horizon (tebuconazole), and four multicomponent fungicides – Pictor (boscalid, dimoxystrobin), Efilor (boscalid, metconazole), Prosaro 250 EC (prothioconazole, tebuconazole), and Propulse (fluopyram, prothioconazole), were chosen as these are commonly used locally. The effect of each fungicide on the in vitro pathogen radial mycelial growth and EC<sub>50 </sub>values for the respective fungicides were determined. The following MIC values were estimated; for the fungicides Horizon 250 EW, Efilor, and Propulse the mean MIC values ranged between 0.125 and 0.250 µl/ml, for Prosaro 250 EC ranged between 0.0625 and 0.125 µl/ml, and for Pictor ranged from 0.00781 to 0.01562 µl/ml. No strains of S. sclerotiorum resistant to the tested fungicides were detected and the growth of all isolates was fully inhibited at concentrations corresponding to their registered dose rates. The highest fungicidal efficacy on the collected S. sclerotiorum isolates was recorded for Pictor, followed by Prosaro 250 with an EC<sub>50</sub> value 0.05856 µl/ml and then the remaining fungicides Propulse, Efilor, and Horizon 250 EW (EC<sub>50</sub> values 0.07277, 0.07221, and 0.08519 µl/ml, respectively).

scholarly journals Detecting Pathogens of Verticillium Wilt in Winter Oilseed Rape Using ELISA and PCR – Comparison of the Two Methods and With Visual Stand Evaluation

2017 ◽  
Vol 65 (1) ◽  
pp. 205-210 ◽  
Author(s):  
Tomáš Spitzer ◽  
Pavel Matušinsky
Keyword(s):  
Czech Republic ◽  
Oilseed Rape ◽  
Verticillium Wilt ◽  
Evaluation Methods ◽  
Winter Oilseed Rape ◽  
Visual Evaluation ◽  
The Czech Republic ◽  
Verticillium Longisporum ◽  
Main Species ◽  
Match Rate

During 2013–2015, oilseed rape samples from various locations in the Czech Republic were analysed for the presence of Verticillium wilt. Samples were evaluated in the lab using ELISA and PCR as well as by visual evaluation during the samples collection. A comparison of detection match in individual methods also was made. ELISA and PCR matched in detecting Verticillium wilt in 60 % of cases. For practical use, a higher match rate would be necessary in cases where samples were to be analysed in various laboratories using only one of these techniques. The possibility was demonstrated to use kits as well as primers not targeted specifically to just Verticillium longisporum but recording both main species on oilseed rape (V. longisporum and V. dahliae). The match rates of lab analyses with visual evaluation of stand infection were surprisingly high at 62 % for ELISA and 77 % for PCR. All three stand evaluation methods matched in 56 % of cases.

scholarly journals Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic

Atmosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1444
Author(s):  
Lenka Hájková ◽  
Martin Možný ◽  
Veronika Oušková ◽  
Lenka Bartošová ◽  
Petra Dížková ◽  
...  
Keyword(s):  
Czech Republic ◽  
Brassica Napus ◽  
Oilseed Rape ◽  
Air Temperature ◽  
Meteorological Variables ◽  
Base Temperature ◽  
Winter Oilseed Rape ◽  
Climatic Zones ◽  
The Czech Republic ◽  
Beginning Of Flowering

Winter oilseed rape (Brassica napus) is one of the most cultivated oilseeds in the Czech Republic and belongs among major pollen allergens. Pollen allergies have an extensive clinical impact worldwide, and as well as in the Czech Republic. In this paper, meteorological variables such as mean air temperature, maximum and minimum air temperature, precipitation total and number of rainy days in the period 1991–2012 were studied using the PhenoClim phenological model to find the best predictor of the beginning of flowering of the Brassica napus in the Czech Republic. In addition, temporal and spatial evaluations of the beginning of flowering of the Brassica napus were examined at individual stations in different climatic zones within the same period. In total, three phenological stations at altitudes from 270 m asl to 533 m asl located in warm (W2), medium warm (MW7) or cold (C7) climatic zones were used for detailed evaluation. Based on the observation results at selected stations, the beginning of flowering of the Brassica napus advanced progressively in timing (nearly −15 days) in the 1991–2012 period. The base temperature and temperature sums were calculated for the beginning of flowering of the winter oilseed rape using the PhenoClim computer tool. As the most accurate predictor for the beginning of flowering of the Brassica napus, the mean air temperature was determined. The optimal start day for calculation was 30th January, the threshold (base temperature) was 6.0 °C and the temperature sum was 157.0 °C. The RMSE value was 4.77 and the MBE value was −3.00. The simulated data had a good correlation with the real observed data (the correlation coefficients were within the range from 0.56 to 0.76), and the PhenoClim model results indicate using them in the forecast modeling of the beginning of flowering of the Brassica napus in the Czech Republic.

scholarly journals Ovicidal effects of thiacloprid, acetamiprid, lambda-cyhalothrin and alpha-cypermethrin on Bruchus pisorum L. (Coleoptera: Chrysomelidae) eggs

2011 ◽  
Vol 47 (No. 3) ◽  
pp. 109-114 ◽  
Author(s):  
M. Seidenglanz ◽  
J. Rotrekl ◽  
J. Poslušná ◽  
P. Kolařík
Keyword(s):  
Czech Republic ◽  
Field Conditions ◽  
Egg Survival ◽  
The Czech Republic ◽  
Real Effects ◽  
First Instar ◽  
Lambda Cyhalothrin ◽  
Ovicidal Effects ◽  
Bruchus Pisorum

The effects of two pyrethroid (lambda-cyhalothrin, alpha-cypermethrin) and two neonicotinoid (acetamiprid, thiacloprid) insecticides on B. pisorum L. eggs were compared under field conditions in the Czech Republic in 2005&ndash;2007. The main objective of the study was to find out what real effects can be expected from the available insecticides registered in Europe when applied at the time of the first egg occurrence on lower pods. In general, the rates of Bruchus pisorum egg (+ first instar larvae) survival were significantly lower with all the insecticides compared in the study, in each of the three years (2005, 2006, 2007). The tested insecticides showed some ovicidal effects and also some larvicidal effects. The tested pyrethroids (lambda-cyhalothrin, alpha-cypermethrin) showed somewhat higher effectiveness in comparison with the neonicotinoids (acetamiprid, thiacloprid). Alpha-cypermethrin was the most effective in all three years. In 2006 and in 2007 this insecticide significantly reduced the rates of egg survival in comparison with acetamiprid. In contrast, acetamiprid was the least effective insecticide in each of the three years.

scholarly journals Utilisation of doubled haploids in winter oilseed rape (Brassica napus L.) breeding

2012 ◽  
Vol 38 (No. 1) ◽  
pp. 50-54 ◽  
Author(s):  
V. Kučera ◽  
M. Vyvadilová ◽  
M. Klíma
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Doubled Haploid ◽  
Microspore Culture ◽  
Doubled Haploids ◽  
Winter Oilseed Rape ◽  
Brassica Napus L ◽  
The Czech Republic ◽  
Yield Parameters ◽  
The World

A survey of development and prospects of the utilisation of doubled haploid techniques in rapeseed breeding in the world and in the Czech Republic is presented. The first utilisation of spontaneously occurred haploids from&nbsp;Brassica napus inbreeding programmes is described. The development of techniques of anther and later microspore culture is outlined. Special emphasis is given to the practical use of doubled haploids for the improvement of the effectiveness of breeding new productive cultivars. Some partial results of evaluation of yield parameters and resistance to important diseases in the obtained doubled haploid lines of winter oilseed rape are shown. The literary review and present results indicate, that the doubled haploid technique can be effectively used for the development of homozygous oilseed rape lines as an alternative to conventional methods.

scholarly journals Biology and harmfulness of Brassica pod midge (Dasineura brassicae Winn.) in winter oilseed rape

2015 ◽  
Vol 30 (2) ◽  
pp. 85-90
Author(s):  
Draga Graora ◽  
Ivan Sivcev ◽  
Lazar Sivcev ◽  
Wolfgang Bьchs ◽  
Vladimir Tomic ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
First Generation ◽  
Yield Reduction ◽  
Winter Oilseed Rape ◽  
Ceutorhynchus Assimilis ◽  
Cabbage Seed Weevil ◽  
Two Generations ◽  
Important Pest ◽  
Cabbage Seed ◽  
Dasineura Brassicae

The Brassica pod midge (Dasineura brassicae Winn.) is an important pest in oilseed rape (Brasica napus L.). It develops two generations per year and overwinters in the larval stage in cocoons in soil. Immigration of the first generation adults lasted from the beginning of April until the end of May. Larvae developed in pods from mid-April to mid-June, causing pod deformation and cracking, which resulted in premature falling out of seeds and yield reduction. Pod damage amounted to 11.6%. The emergence of the second generation adults was detected at the end of May and in the first ten days of June. D. brassicae was found to lay eggs in healthy pods and no correlation was found with the cabbage seed weevil, Ceutorhynchus assimilis Paykull.

scholarly journals Meligethes aeneus (Coleoptera: Nitidulidae) resistance to lambda-cyhalothrin in the Czech Republic in 2012 and 2013

2016 ◽  
Vol 51 (No. 2) ◽  
pp. 94-107 ◽  
Author(s):  
M. Seidenglanz ◽  
J. Poslušná ◽  
J. Rotrekl ◽  
P. Kolařík ◽  
E. Hrudová ◽  
...  
Keyword(s):  
Czech Republic ◽  
Meligethes Aeneus ◽  
The Czech Republic ◽  
Lambda Cyhalothrin
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