Wyniki wyszukiwania

1

Transgenic F1 hybrids harboring a defective viral replicase exhibit high resistance to CMV in the field

100%

Gal-On A., Wolf D., Pilowski M., Zelcer A.

Acta Physiologiae Plantarum

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2000

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tom 22

|

nr 2

2

Research into the effect of agricultural tyres on soil compaction on the loosened field

100%

Blaszkiewicz Z. S.

Bibliotheca Fragmenta Agronomica

|

1997

|

tom 2A

3

Effect of soil compaction on root system morphology and yields of meadow fescue [Festuca pratensis]

84%

Glab T., Kopec S.

Polish Journal of Environmental Studies

|

2009

|

tom 18

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nr 2

219-225

Tractor traffic as a cause of soil compaction is widely recognized as one of the most important factors responsible for environmental degradation and plant yield losses. It is a serious problem for perennial crops, where the soil surface is wheeled without any opening operation. The aim of our study was to evaluate the effect of tractor traffic on meadow fescue (Festuca pratensis) yields and root development. The field experiment was located in Mydlniki near Kraków, Poland, on silty loam Mollic Fluvisol. Experimental plots were established in randomized block design with four replications. Four compaction treatments were applied using the following range of number of passes: (P0) untreated control, (P2) two passes, (P4) four passes and (P6) six passes completely covering plot surfaces after each harvest. The dry matter (DM) of the yield and roots (RMD) were determined. Morphometric parameters of roots were estimated using image analysis software. Root length density (RLD), specific root length (SRL), and mean diameter (MD) were calculated. Tractor traffic resulted in significant influence on meadow fescue annual yields. The highest annual yields were obtained at the P2 and P4 treatments. However, in the first cut it was noticed that an increase in the number of passes increased plant yields. During the second and the third cut it was found that intensive tractor traffic decreased plant yields, probably as an effect of damage caused to above-ground parts of plants. The meadow fescue roots were significantly affected by tractor traffic only in the 5-15 cm soil layer. Tractor traffic increased the RLD value in a root diameter range of 0.1-0.5 mm. However, any other morphometric parameters, like mean root diameter (MD), specific root length (SRL) or dry root diameter (RDM) were not affected by soil compaction.

4

Straty plonu ziarna pszenicy ozimej powodowane przez choroby grzybowe

84%

Jaczewska-Kalicka A.

Progress in Plant Protection

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2005

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tom 45

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nr 2

722-724

5

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The losses in potato yield caused by Colorado potato beetle (Leptinotarsa decemlineata Say) in Poland during 1973-1975

84%

Maj J.

Prace Naukowe Instytutu Ochrony Roślin

|

1980

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tom 22

|

nr 2

6

Assessment of yield loss of roselle [Hibiscus sabdariffa L.] due to root-knot nematode, Meloidogyne incognita under field conditions

84%

Adegbite A. A., Agbaje G. O., Abidoye J.

Journal of Plant Protection Research

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2008

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tom 48

|

nr 3

267-274

Root-knot nematode Meloidogyne incognita (Kofoid & White) Chitwood is an economically important pathogen of many agricultural crops, and the frequency of occurrence, abundance and importance of this nematode in resource-poor agricultural production systems make control necessary. Field studies were conducted in 2004 and 2005 to determine yield loss of Roselle due to natural infestation by M. incognita using Carbofuran 3G at 2 kg a.i./ha and untreated as check. The yield of Roselle was found to be higher with the application of nematicide-Carbofuran 3G at 2 kg a.i./ha. The percentage increase over control was 48.7 and 40.8% in the years 2004 and 2005, respectively. A significant reduction in the yield of Roselle in untreated plots was mainly attributed to direct damage of the root system by the feeding of root-knot nematode M. incognita. Root-knot nematode population in carbofuran treated plots was significantly lower than in untreated check in the two years, also at harvest. In the check the nematodes multiplied many folds during the cropping season. High nematode population in the untreated check decreased plant growth and ultimately reduced the number of seeds and weight of seeds.

7

Biology and taxonomy of Stagonospora nodorum on barley

84%

Cunfer B. M.

Hodowla Roślin, Aklimatyzacja i Nasiennictwo

|

1994

|

tom 38

|

nr 3-4

8

Risk of damage to winter wheat by Pseudocercosporella herpotrichoides [Fron] Deighton, the causal agent of eyespot. I. Field observations

84%

Jaczewska-Kalicka A.

Journal of Plant Protection Research

|

1998

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tom 38

|

nr 2

Field studies were performed in the years 1986-1990 on the incidence, severity and harmfulness of eyespot (Pseudocercosporella herpotrichoides) on naturally infected winter wheat cultivated in 6 regions of Poland. In average, over one-third of plants showed infection symptoms at GS 75-85 (ripening), the severity of the disease being predominantly low. On the basis of data recorded, infection indices (Scott and Hollins 1978) and percentages of grain yield losses (Clarkson 1981) were calculated for each year and region. Data are also given on the influence of disease on selected yield components, and on the effect of lodging on the occurrence and severity of eyespot, as related to grain yield, and some aspects of its quality. Average grain yield losses accounted for 2.37%, being the highest in south-eastern region (3.55%) and south-western region (3.52%), and the lowest in north-eastern (1.32%) and central (1.58%) regions of winter wheat cultivation in Poland.

9

Risk of damage to winter wheat by Pseudocercosporella herpotrichoides [Fron] Deighton, the causal agent of eyespot. II. Results of plot experiments

84%

Jaczewska-Kalicka A.

Journal of Plant Protection Research

|

1998

|

tom 38

|

nr 2

In 1987-1990 plot experiments with winter wheat were performed to investigate grain yield losses caused by Pseudocercosporella herpotrichoides. Each year wheat was sown after a cereal forecrop to increase the disease risk. Eyespot developed under natural infection conditions. In 1988 an additional experiment was established on plots artificially inoculated with P. herpotrichoides to increase infection pressure. Experimental variants included plots protected with 5 benzimidazole fungicides to control the pathogen, and chemically unprotected plots. As the effectiveness of fungicides was satisfactory, the differences in grain yield from protected and unprotected plots were regarded as grain yield loss in conditions of lack of appropriate chemical control of the disease. Average grain yield losses for the years 1987-1990 amounted to 4.21 dt/ha (10.36%). The highest losses of 8.43 dt/ha (30.28%) occurred in 1990, when weather conditions were the most fovourable to the development of eyespot, and on artificially inoculated with P. herpotrichoides plots in 1988 (5.56 dt/ha, 12.75 %). The paper also presents detailed data on the occurrence and severity of eyespot at GS 75-85 as related to grain yield losses, and data on the influence of the disease on some yield components, with a special reference to 1000 grain weight. Correlation coefficients between the most important factors related to the disease incidence revealed that grain yield and 1000 grain weight were most strongly correlated with infection index at GS 75-85. A significant correlation between the disease occurrence at GS 31-32 and the above characteristics occurred only when more than 10% plants showed infection symptoms in the spring. Severe infection occurred only in 1990, when weather conditions were conductive to the development of the disease. The results presented are also discussed in relation to parallel field observations on 356 commercial fields located in all the regions of winter wheat cultivation in Poland, published elsewhere. lt has been concluded that chemical control of eyespot on the experimental plots could have been justified only in 1990 conductive to the disease development. Economical feasibility of using fungicides at GS 31-32 could be most likely to obtain with broad spectrum fungicides, effective against eyespot and other diseases occurring at early growth stages of winter wheat. This publication as well as the previous one published under the same title as Part I, are the first reports on grain yield losses caused in Poland by P. herpotrichoides.

10

The effect of temperature and humidity on the grazing activity of Deroceras reticulatum (O. F. Muller, 1774) and the damage to rape plants

67%

Kozlowski J., Jaskulska M., Kaluski T., Kozlowska M.

Folia Malacologica

|

2011

|

tom 19

|

nr 4

Winter rape is susceptible to damage caused by D. reticulatum (O. F. Müller) mainly in the early phases of the plants’ development. The degree of damage and the size of yield losses depend on the slug population and the grazing activity, which are governed by many environmental factors. Laboratory studies were performed to analyse the rate and amount of damage to rape plants (2–3 leaf stage) caused by D. reticulatum, and the effect of temperature and soil humidity on the slug’s grazing activity. With increasing air temperature (up to 16°C) the amount of damage increased, but the effect was not lasting. The slugs were also active at low temperatures (+1°C), and although their grazing was less intense, the amount of damage after seven days could reach an average of 34%. In laboratory tests, the soil humidity had no marked effect on the amount of damage done by the slugs.

11

Niezmiarka paskowana [Chlorops pumilionis Bjerk.] - zapomniany szkodnik zboz

67%

Lisowicz F.

Progress in Plant Protection

|

1998

|

tom 38

|

nr 1

156-159

12

Oszacowanie przewidywanych strat plonu ziemniaka w nastepstwie epidemii wirusowej 1991 roku

67%

Styszko L.

Ziemniak Polski

|

1992

|

nr 1

16-20

13

Warunki pogodowe jako czynnik silnie modyfikujacy wielkosc i jakosc plonu ziarna pszenicy ozimej w swietle wystepowania chorob grzybowych

67%

Jaczewska-Kalicka A.

Progress in Plant Protection

|

2005

|

tom 45

|

nr 1

176-184

14

Metoda emisji akustycznej w badaniu procesow pekania tkanek roslinnych

67%

Konstankiewicz K., Zdunek A.

Acta Agrophysica

|

1999

|

tom 24

87-95

W wyniku odkształcania tkanki roślinnej zachodzą w niej nieodwracalne procesy fizyczne, prowadzą w konsekwencji do osiągnięcia stanu wytrzymałości. Jednym z tych nieodwracalnych procesów jest niszczenie struktury komórkowej, które zachodzi poprzez pękanie błon komórkowych oraz utratę spójności w warstwie pektynowych lamelli. W wyniku tych zjawisk emitowany jest sygnał emisji akustycznej. W pracy opisano metodę emisji akustycznej i jej zastosowanie do badań procesów pękania tkanek roślinnych.

15

Czy niezmiarka paskowana zagraza plonom pszenicy jarej w rejonie Podkarpacia?

67%

Kaniuczak Z., Malosz I.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

|

2003

|

nr 06

17-18

16

Zmiennosc strat plonu pszenicy ozimej powodowanych przez choroby grzybowe w latach 1996-1999

67%

Jaczewska-Kalicka A.

Progress in Plant Protection

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2000

|

tom 40

|

nr 2

623-626

17

Ocena strat plonu powodowanych przez choroby grzybowe pszenicy ozimej

67%

Jaczewska-Kalicka A.

Progress in Plant Protection

|

2002

|

tom 42

|

nr 2

853-855

18

Uszkodzenia mechaniczne ziarna pszenicy w okresie przedzniwnym jako przyczyna strat plonu

67%

Geodecki M., Grundas S., Sosnowski S.

Acta Agrophysica

|

2003

|

tom 02

|

nr 1[95]

51-61

19

Potassium fertilization, water shortages during vegetation and crop yielding variability the case of sugar beets

67%

Grzebisz W., Musolf R., Barlog P., Potarzycki J.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

|

2002

|

tom 222

The first part of this review documents the mechanisms of plant resistance to water shortages during growth. It has been indicated, that appropriate supply of crop plants with potassium improves their water management and consequently results in higher resistance to stresses, including droughts. The anti-stress potassium action is a consequence of higher K+ ions concentration in the soil solution (due to natural fertility or K fertilization); greater perpendicular range of the root system; faster growth rate of above-ground parts of a plant and, consequently, earlier coverage of soil surface. In the second part an attempt was made to explain the major reasons of considerable sugar beet yield losses in Poland, as well as their considerable dependence on weather conditions, i.e. year to year variability. The importance of factors was as follows (i) low, natural, level of available potassium (ii) high frequency of periods with water deficiency and (iii) insufficient, in relation to the nutrient requirement, K fertilization. Using experimental data it was shown that appropriate nutrition of sugar beet plants with potassium allowed them to survive during the critical growth stages and, consequently, reduced the risk of yield losses caused by drought.

20

Microsatellite mapping of the genes for brittle rachis on homoeologous group 3 chromosomes in tetraploid and hexaploid wheats

67%

Watanabe N., Fujii Y., Kato N., Ban T., Martinek P.

Journal of Applied Genetics

|

2006

|

tom 47

|

nr 2

The brittle rachis character, which causes spontaneous shattering of spikelets, has an adaptive value in wild grass species. The loci Br₁ and Br₂ in durum wheat (Triticum durum Desf.) and Br₃ in hexaploid wheat (T. aestivum L.) determine disarticulation of rachides above the junction of the rachilla with the rachis such that a fragment of rachis is attached below each spikelet. Using microsatellite markers, the loci Br₁, Br₂ and Br₃ were mapped on the homoeologous group 3 chromosomes. The Br₂ locus was located on the short arm of chromosome 3А and linked with the centromeric marker, Xgwm32, at a distance of 13.3 cM. The Br₃ locus was located on the short arm of chromosome 3B and linked with the centromeric marker, Xgwm72 (at a distance of 14.2 cM). The Br₁ locus was located on the short arm of chromosome 3D. The distance of Br₁ from the centromeric marker Xgdm72 was 25.3 cM. Mapping the Br₁, Br₂, and Br₃ loci of the brittle rachis suggests the homoeologous origin of these 3 loci for brittle rachides. Since the genes for brittle rachis have been retained in the gene pool of durum wheat, the more closely linked markers with the brittle rachis locus are required to select against brittle rachis genotypes and then to avoid yield loss in improved cultivars.

Ograniczanie wyników

Transgenic F1 hybrids harboring a defective viral replicase exhibit high resistance to CMV in the field

Research into the effect of agricultural tyres on soil compaction on the loosened field

Effect of soil compaction on root system morphology and yields of meadow fescue [Festuca pratensis]

Straty plonu ziarna pszenicy ozimej powodowane przez choroby grzybowe

The losses in potato yield caused by Colorado potato beetle (Leptinotarsa decemlineata Say) in Poland during 1973-1975

Assessment of yield loss of roselle [Hibiscus sabdariffa L.] due to root-knot nematode, Meloidogyne incognita under field conditions

Biology and taxonomy of Stagonospora nodorum on barley

Risk of damage to winter wheat by Pseudocercosporella herpotrichoides [Fron] Deighton, the causal agent of eyespot. I. Field observations

Risk of damage to winter wheat by Pseudocercosporella herpotrichoides [Fron] Deighton, the causal agent of eyespot. II. Results of plot experiments

The effect of temperature and humidity on the grazing activity of Deroceras reticulatum (O. F. Muller, 1774) and the damage to rape plants

Niezmiarka paskowana [Chlorops pumilionis Bjerk.] - zapomniany szkodnik zboz

Oszacowanie przewidywanych strat plonu ziemniaka w nastepstwie epidemii wirusowej 1991 roku

Warunki pogodowe jako czynnik silnie modyfikujacy wielkosc i jakosc plonu ziarna pszenicy ozimej w swietle wystepowania chorob grzybowych

Metoda emisji akustycznej w badaniu procesow pekania tkanek roslinnych

Czy niezmiarka paskowana zagraza plonom pszenicy jarej w rejonie Podkarpacia?

Zmiennosc strat plonu pszenicy ozimej powodowanych przez choroby grzybowe w latach 1996-1999

Ocena strat plonu powodowanych przez choroby grzybowe pszenicy ozimej

Uszkodzenia mechaniczne ziarna pszenicy w okresie przedzniwnym jako przyczyna strat plonu

Potassium fertilization, water shortages during vegetation and crop yielding variability the case of sugar beets

Microsatellite mapping of the genes for brittle rachis on homoeologous group 3 chromosomes in tetraploid and hexaploid wheats