The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Biological activity of6 fungicides in the inhibition of Phytophthora ramorum sporulation and development ofblight on rhododendron leaves and stems were evaluated. All tested compounds at dose 8 µg ofa.i./cm3 already inhibited zoosporangia formation at least in 73%. On leafpetioles and leafdisks, taken from rhododendron one week after treatment with fungicides, formation of chlamydospores was especially...
The investigations conducted in 1994 and 1996 concerned aphids infesting fields and neighbouring semi-natural habitats – midfield thickets with trees and the vegetation growing on the ditch margins. Aphids were caught into Moericke traps placed at the plant level. The material collected was studied to determine aphid number, dominance of individual species, similarity of dominance structure of aphid...
Saprol 190 EC (triforine) and Rubigan 12 EC (fenarimol) diluted in 6 types of water were applied against rose rust Phragmidium mucronatum Cooke. No adjuvants were added to the emulsion except when the spray mix was made using water from Poznań prepared in 2 variants: with an addition of Citowett AL and without it. Independently on the plant protection product type, efficacy of fungicides diluted in...
The results of experiments showed an effect of magnetized water on the effectiveness of some selected zoocides. The control of red spider mite (Tetranychus urticae Koch) by Ortus 05 SC showed the highest effectiveness with strongly magnetized water, with use of one magnetizer and two semi-rings. On the other hand, the application of Magus 200 SC in combination with magnetized water showed a decreased...
On the basis of the presented studies, it was established that seed dressing by coating protects effectively onion crops against onion fly (Hylemyia antiqua Meig.). In all seed dressing treatments, a significant decrease of number of damaged plants was found in comparison to the control. The highest efficacy in protection of onion against onion fly was shown in the case of insecticide Super Homai...
Phytophthora citricola was isolated fromdiseased seedlings of European beech and Silver fir taken fromthe most of surveyed nurseries. Fusarium species, Pythium ultimum and Rhizoctonia solani were also found in diseased plant tissues. Isolates of P. citricola fromboth plants and additionally fromheather and rhododendron colonised leaf blades, needles and stemparts of beech and fir. In greenhouse trials...
Monoculture of modern cereal crops are popular due to the technical and organizationalreasons. They are easier in crop husbandry, quality and product use. However, in monoculture chemical protection of crops is a norm, due to the fact that they are more susceptible to diseases, pests and sometimes weed infestation. In order to keep high and stable grain yields and quality in monoculture one has to...
Investigation of leaf rust disease on spring crops of triticale (×Triticosecale Wittm.), itsdistribution dynamics, aswell asthe efficacy of two fungicides, different application doses and timing was carried out at the Lithuanian Institute of Agriculture during 2000–2002. Differences in the disease development were determined by the meteorological conditions, especially the amount of rainfall, and...
Apple cultivars investigated as new hosts for two-spotted spider mite, Tetranychus urticae Koch appeared to provide good environment for its development and reproduction. The best conditions for two-spotted spider mite development were on leaves of cultivars Novamac and Freedom with a net reproduction (Ro) 22.6 and 20.3 respectively, while the worst on cultivars Pioner and Primula with Ro 8.9 and...
Apple cultivars investigated as new hosts for two-spotted spider mite, Tetranychus urticae Koch appeared to provide good environment for its development and reproduction. The best conditions for two-spotted spider mite development were on leaves of cultivars Novamac and Freedom with a net reproduction (Ro) 22.6 and 20.3 respectively, while the worst on cultivars Pioner and Primula with Ro 8.9 and...
The experiments were carried out in red beet crop (cv. Czerwona Kula) from 1995 to 2000. The aim of investigations was to determine the influence of mechanical weeding frequency on the species composition of aphidophagous Syrphidae in colonies of Aphis fabae Scop. in four treatments differing in ground coverage by weeds. No direct influence of weeds in red beet cultivation on species composition of...
The studies on biological control of damson-hop aphid (Phorodon humuli Schrank) on Marynka cultivar, using Aphidius colemani and Aphidoletes aphidimyza, were carried out in the hop-garden localised within Hop Experimental Station at Jastków over the years 1998–2000. The efficacy of Aphidius colemani ranged from 5% to 65% and was found sufficient to control damson-hop aphid in the period before flowering...
In the years 2000–2002, studies were carried out on susceptibility of 12 field bean (Vicia faba L. var. minor Harz.) cultivars to evaluate seed damage caused by bean weevil (Bruchus rufimanus Boh.). Seed analysis showed that determinate cultivars (Tim, Martin, Rajan and Optimal) were more susceptible to damage caused by bean weevils than other cultivars. In the course ofthe studies damage caused by...
Bacterial wilt caused by Clavibacter michiganensis subsp. insidiosus (Cmi) is an integral part of chronic vascular wilt of alfalfa. The aim of the presented study was to determine the virulence of Cmi strains and later on to evaluate the level of resistance of alfalfa varieties registered in the Czech Republic and of some standard check varieties. Three methods of inoculation were compared at greenhouse...
A 3-year field experiment was conducted to study the effect of seed treatment (Raxil 060 FS and Raxil 060 FS + Latitude 125 FS) and plowing down stubble crop (white mustard) on wheat infestation by root and stem base diseases. Wheat was growninthe same field for two consecutive years with two tillage systems: conventional and no-tillage. The occurrence of root and stem base diseases was significantly...
The effectiveness of 12 chemicalcompounds (azoxystrobin, carbendazim, chlorothalonil, fenarimol, folpet, mancozeb, myclobutanil + mancozeb, prochloraz + carbendazim, tebuconazole + triadimefon, tetraconazole + chlorothalonil, tiophanate-methyl, tridemorph + epoxiconazole) in the control of Puccinia horiana was tested on chrysanthemum cv. Fiji Yellow. Additionally, their influence on plant growth,...
For producers of winter wheat the main purpose is to obtain high yield ensuring profitability. However, as the grain yield is concerned, profitability depends to a considerable degree upon its high quality giving a chance to obtain a higher selling price. The high grain quality is influenced by numerous factors. In the performed research work the influence of climatic conditions and intensity of the...
A method for the fast identification of trace levels of pesticide residues in agricultural crops was developed using low pressure gas chromatography/mass spectrometry (LP-GC/MS). The finalchromatographic determination took 12 minutes per sample while conventional GC/MS required at least 30 minutes. Also, improved peak shapes for dichlorvos, dimethoate, chlorothalonil, pirymethanil, pirimicarb, carbaryl,...
Compatibility between rhizobial inoculants and fungicides used for seeds treatment remains controversial. The aim of this study was to investigate the effect of the fungicide Funaben T (thiram – 45%, carbendazim – 20%) on the nodulation of soybean (Glycine max cv. Nawiko) inoculated with two Bradyrhizobium japonicum strains (USDA 110 and USDA 123). Reduced nodulation of soybean was observed in the...
The results of studies showed that residues of 2,4-D bound in the soil are available for wheat plants. It was found that most of radioactive residues detected in the soil were accumulated in fulvic acids fraction soluble in the water. Therefore, this part of residues can be available not only for progressive plants, but also for soil and aquatic organisms. The binding of 2,4-D residues with the soil...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.