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The paper present results from the studies carried out in the years 1999-2000 on the effectiveness of seed dressing of spring barley with the insecticide Gaucho 350 FS (a.i. imidachloprid) to control frit flies, gout flies, aphids and thrips in piedmont conditions.
Two experimental methods were used in the study. The aim of the first one was focused on a detection of Arabis mosaic nepovirus (ArMV) particles and tubules with viruses in extracts obtained from crushed leaves of bean. Second one consisted on investigation of ultrastructural changes occuring in the bean leaf tissues with symptoms caused by ArMV. Characteristic membranous inclusions in the cytoplasm...
Investigations on the occurrence of Barley stripe mosaic virus (BSMV, Hordeivirus) in Poland were performer by testing seeds of 22 barley cultivars. BSMV was detected in seeds of winter barley cv. Tiffany and of spring barley cvs. Scarlett and Stratus. The virus presence was revealed by ELISA test and then confirmed by electron microscopy. Preliminary data on the rate of seed transmission of BSMV...
Biological methods of weed control are alternative to chemical treatments. Biological techniques are used where no possibility for chemical spraying occurs. Rumex confertus Willd. is an example of a plant-eater which is potentially more important than chemical compounds. The objective of the study was to evaluate population dynamics and the development of Hypera rumicis L. (Coleoptera, Cucurlionidae)...
The objective of this work was to estimate the disappearance of pyrimethanil the active ingredient of Mythos 300 SC. At present, Mythos 300 SC is commonly used for the protection of greenhouse vegetables against diseases of fungal origin. The behaviour of pyrimethanil deposits was studied on tomato plants grown in commercial greenhouses sprayed with homogenous 0.15% aqueous solution of this plant...
The paper presents results of studies on the occurrence and economic importance of maize pests: European corn borer (Ostrinia nubilalis Hbn.) and frit tly (Oscinella frit L.) (conducted in 1977-2000) as well as aphids (Aphididae) and thrips (Thysanoptera) (in 1982- 1983, 1985 and 1988-2000).
The quality of wheat spraying obtained white applying drift guard Turbo TeeJet 110 02 VP nozzles was tested. A standard boom and a boom equipped with an air sleeve were applied. Krukowiak-Bravo sprayer was used to test the influence of the air flux. The coverage was estimated on water sensitive papers. The spray coverage of wheat with TT 110 02 VP nozzles was satisfactory, both in case of conventional...
The artificially made kernels from ground wheat grain, commercial wheat starch and wheat proteinaceous α-amylase inhibitors in different proportions were used as feed for adults of the granary weevil (Sitophilus granarius L.). In the case of larvae of the confused flour beetle (Tribolium confusum Duv.) and the Mediterranean flour moth (Anagasta kuehniella Zell.) the friable feed mixture were used...
W 2000 roku stwierdzono nowe stanowisko występowania ślimaka Arion lusitanicus Mabille. Było ono zlokalizowane w Poznachowicach Górnych (UTM DA 43) w siedlisku upraw rolniczych. Ślimak bardzo dobrze zaadoptował się w nowym siedlisku i jest groźnym szkodnikiem roślin uprawnych.
The objective of the study was to determine feeding preferences of the khapra beetle (Trogoderma granarium Everts) towards some plant products. The material for the investigations was composed of grain of four barley varieties: Brenda, Krona, Maresi, Rasbet; barley malt, and nutlets of three varieties of buckwheat: Hruszowska, Emka and Kora. The reference material comprised wheat grain of the commercial...
The purpose of the studies conducted in the years 1996-1998 was to determine the quantitative composition of bacteria and fungi populations in the rhizosphere of spring wheat, winter wheat, potato and soybean, and in non-rhizosphere soil. Besides, the effect of root exudates of these plants on the formation of antagonistic microorganisms is presented. A microbiological analysis found out that 1 g...
Studies on the daily activity of A. lusitanicus were conducted under field and laboratory conditions. Two main phases - the activity phase and the phase of resting- have been distinguished in the daily cycle of the slug. The observed activity was of different types, such as crawling, feeding and the state of semiactivity. lt has been found that slug activity is determined by various atmospheric factors,...
Two potato cultivars, sprayed and nonsprayed with fungicides, were evaluated to determine the association of late blight (caused by Phytophtora infestans) and radiometric leaf reflectance to disease development. Spectral radiance measurements were taken with CIMEL CE3132 luminancemeter in the visible (450 nm, 550 nm and 650 nm) and near-infrared (850 nm) range of the electromagnetic spectrum. The...
Amendment of potato-dextrose agar with grapefruit extract at dose 40μg/cm³ inhibited linear growth of Phytophthora cryptogea about 50%. At such concentration of the product in soil leachate formation of zoosporangia was inhibited about 95%. Application of grapefruit extract as peat drench reduced population density of the pathogen about 80% and this high activity was observed at least 30 days. The...
Field experiments were conducted to determine quizalofop-P-tefuryl (Pantera 040 EC) efficacy for control of couchgrass (E. repens) at crop rotation peas-spring cercals. The results showed that herbicides applied at 4-8 leaf stage of E. repens enhanced weed control effect. Subsequent treatments i.e. at 10- 12 leaf stage of E. repens were less effective. In the following years, the yield of spring cereals...
The aim of the work was to study the feeding deterrent activity of precocenes, their synthetic analogues, and some related compunds to storage pests: Sitophilus granarius L., Tribolium confusum Duv., Trogoderma granarium Ev., and aphids: Myzus persicae (Sulz.). Among all tested compounds precocenes I and II exhibited the best feeding deterrent activity against all tested insects. 4-Chromanols (16,...
The purpose of applying an additional air flux in field sprayers is limiting liquid drift. The tlux also influences the quality of plant spraying. Air Plus Spridotrain sprayer, produced by RAU company, was applied in the research on the influence of air flux on the quality of coverage of winter wheat (Roma variety). The plant coverage was determined using water sensitive papers.
Influence of grapefruit extract (GE) on mycelial growth, spore germination, population density of Fusarium oxysporum f. sp. cyclaminis and F. oxysporum f. sp. dianthi and its effectiveness in the control of Fusarium wilt of carnation and Fusarium corm rot of gladiolus (F. oxysporum f. sp. gladioli) was studied. Amendment of PDA with 40 μg of GE/cm³ inhibited mycelial growth about 50%. Drenching of...
In the years 1999-2000 the studies on the population of true bugs colonizing the inflorescences of quinoa (Chenopodium quinoa Willd.) were conducted in Chrząstowo near Bydgoszcz. The dominating species was Lygus rugulipennis Popp. The species was recorded in 81.44% in 1999 and 83.64% in 2000 of all collected true bugs.
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