Wyniki wyszukiwania

1

Determination of developmental periods of leaf beetle [Oulema spp.] for short-term forecasting

100%

Walczak F.

Journal of Plant Protection Research

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2005

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tom 45

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nr 3

145-153

Two species of leaf beetle (Oulema spp.) – Oulema melanopus (Linnaeus 1758) and Oulema gallaeciana (Heyden 1870) are classified as the pests of cereals of economicalimportance in Poland. Determination of the optimalperiod of their control is very difficult due to extended time of laying eggs and brood of larvae. Mass brood of larvae of both species takes place at the time when larvae hatched from first laid eggs reached ca. 4 mm length of both species. Both developmental stages indicate an optimal term of leaf beetle control. To improve short-term forecasting and warning system the data on developmental cycles of both species from an egg to larva (ca. 4 mm size), the studies were carried out in the field trails in the Wielkopolska region and some in an environmental growth chamber.

2

The spring cereals food preferences of Oulema ssp.in pure and mixed crops

100%

Wenda-Piesik A., Piesik D.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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1998

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tom 01

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nr 1

The oats were observed to be the species mostly damaged by Oulema ssp. phytophages which is represented by the highest damage indexes of the plant in all the objects researched. The two other species: barley and spring triticale are much less sensitive to feeding of the pest. The initial damage which was due to the complementary feeding was hidden due to the compensation capabilities of the cereals. Spring barley, which tillers most, compensated for the damage most considerably. The economic harmfulness of the Oulema feeding may be estimated only in shooting phase, when also the larvae start skeleting of leaf blades. In barley and spring triticale a considerably lower larvae feeding was observed when compared with leaf beetles. The co-ordinate cultivation of the researched species with fodder pea and in two-ingredient cereal mixtures enhances the damage reduction caused by Oulema feeding.

3

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Resistance to cereal leaf beetle and bird cherry-oat aphid in winter wheat

100%

Papp M.

Genetica Polonica

|

1994

|

tom 35B

4

Wplyw zerowania larw i chrzaszczy skrzypionki zbozowej [Oulema melanopus L., Coleoptera: Chrysomelidae] na wydzielanie lotnych zwiazkow organicznych przez pszenice [Triticum aestivum L. emend. Fiori et Paol.] oraz reakcja imagines na te komponenty

80%

Piesik D.

Rozprawy. Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy

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2008

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nr 131

1-88

5

Nowe szkodniki kukurydzy

80%

Mrowczynski M., Boron M.

Agrotechnika. Poradnik Rolnika

|

2005

|

nr 05

44-47

6

Occurrence of pest species of the genus Oulema [Coleoptera: Chrysomelidae] in cereal fields in Northern Poland

80%

Ulrich W., Czarnecki A., Kruszynski T.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2004

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tom 07

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nr 1

The cereal leaf beetles Oulema melanopus L. and Oulema gallaeciana Heyden (Chrysomelidae) are common pests in European and North American cereal fields. Here we report infestation rates by Oulema spp. and yield loss of winter wheat and barley in Northern Poland (1995 to 1997) and show that both Oulema species might be of significant economic importance. Oulema melanopus was in all the three study years more abundant than Oulema gallaeciana. Larval densities ranged from 22 to 26 larvae per 100 stalks for winter wheat and 29 to 36 larvae per 100 stalks for barley. From these data we estimate yield losses of 0.5 to 4% for winter wheat and 3 to 8% for barley. The significant negative correlation between beetle abundances and the hydrothermic index indicates that higher precipitation and/or lower temperature had a negative effect on the activity of O. melanopus and O. gallaeciana.

7

Badania nad zastosowaniem nowych insektycydow do zwalczania skrzypionek zbozowych [Lema spp.]

71%

Bubniewicz P., Mrowczynski M., Widerski K., Wachowiak H., Kaniuczak Z., Glazek M., Seta G.

Progress in Plant Protection

|

1997

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tom 37

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nr 2

74-76

8

Zagrozenie plonu pszenicy jarej przez szkodniki w gospodarstwie ekologicznym w rejonie Strzyzowa

71%

Kaniuczak Z.

Progress in Plant Protection

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2004

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tom 44

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nr 2

780-783

9

Studies on leaf beetles [Oulema spp.] development for short-term forecasting - evaluation of effect of temperature and humidity on duration of egg incubation

71%

Walczak F.

Journal of Plant Protection Research

|

2005

|

tom 45

|

nr 3

135-143

Two species of leaf beetles from Chrysomelidae family i.e. the cereal leaf beetle Oulema melanopus (Linnaeus 1758) and the blue leaf beetle Oulema gallaeciana (Heyden 1970) can cause considerable damage to cereal crops. Improvement of short-term forecasting was focused on determination of optimal time of control of these pests that takes place at mass larval hatching. Thus long term studies were carried out to evaluate a correlation between duration of egg incubation, temperature and air humidity. The length of egg incubation was examined at temperatures of 16°C, 20°C and 25°C and air humidity 60% in a growth chamber and under field conditions. Based on linear and curvilinear multinomial regression analyses the influence and significance of such independent variable (x) as: sum of temperatures (sums of mean daily temperatures), mean air humidity, sum of effective temperatures and mean effective temperature versus duration of egg incubation of O. melanopus and O. gallaeciana (dependent variable – y) were evaluated. Analyses of 32 interactions (x, y) showed that only four were insignificant i.e. mean air humidity in the growth chamber at 20°C had no effect on the length of egg incubation of O. melanopus and at 25°C on the length of egg incubation of O. gallaeciana. Also under field conditions sums of effective temperatures showed no effect on duration of egg incubation of both species.

10

Szkodliwosc skrzypionek [Oulema spp.] dla zboz jarych w siewach czystych i mieszanych

71%

Pisarek M.

Progress in Plant Protection

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1999

|

tom 39

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nr 2

413-415

11

Badania scisle i wdrozeniowe nad zastosowaniem nowoczesnych insektycydow do zwalczania skrzypionek zbozowych [Lema melanopa L.et L.cyanella Voet.]

71%

Walkowski W., Mrowczynski M., Wachowiak H., Drzewiecki S.

Progress in Plant Protection

|

2000

|

tom 40

|

nr 2

460-463

12

Zmienność i rozmieszczenie w Polsce Oulema melanopus [L.] i O. duftschmidi [REDT.] [Coleoptera, Chrysomelidae]

61%

Chrobok I., Borowiec L.

Wiadomości Entomologiczne

|

1993

|

tom 12

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nr 1

19-23

Oulema melanopus and O. duftschmidi are recorded from most Polish zoogeographical regions. Both species are characterized by a great morphological and biometrical variability, and only structure of internal sac of male genitalia is diagnostic.

13

Skuteczność biologiczna oraz wskaźniki ekonomiczne chemicznego zwalczania szkodników w pszenżycie jarym

61%

Kaniuczak Z.

Progress in Plant Protection

|

2010

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tom 50

|

nr 1

The research on the biological and economic effectiveness of the application insecticides in controlling of cereal leaf beetles larvae in triticale was carried out in 2008–2009. The Talstar 100 EC, Karate Zeon 050 CS and Cyperkill Super 25 EC pesticides appeared most effective in the studies on chemical control of leaf beetle larvae. The chemical control of leaf beetle larvae caused the increase triticale grain yield, ranging from 3.6 dt/ha to 6.9 dt/ha, i.e. 5.5 dt/ha on average. The defrayal index ranged from 1.7 do 5.2, while index of profitability ranged from 1.1 to 3.0. The average per cent cost coefficient was 2.4.

14

Nowe szkodniki w uprawie kukurydzy

61%

Boron M., Mrowczynski M.

Progress in Plant Protection

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2005

|

tom 45

|

nr 1

68-71

15

Cechy anatomiczne lisci trzech odmian pszenicy ozimej [Triticum aestivum L.] a zasiedlanie roslin przez skrzypionki zbozowe, Oulema spp. [Coleoptera, Chrysomelidae]

61%

Weryszko-Chmielewska E., Soczynski G.

Acta Agrobotanica

|

1994

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tom 47

|

nr 2

53-62

Investigations of flag leaves anatomy of three winter wheat cultivars: Almari, Gama and Weneda were carried out as it was state that there are great differences in the intensity of cereal leaf beetle feeding on the leaves. In order to determine the features conditioning the differentiated resistance of these cultivars following parameters were measured: the thickness of leaf blade, the length of trichomes and their density in the adaxial epidermis, the number of silicon cells in 1 mm2 epidermis and the thickness of the external cell walls of epidermis. The observations of cross section of the leaves were made in a light microscope and that of surface of the adaxial epidermis in a scanning electron microscope. In this study it was shown that Gama cv. distinguishes of the shortest trichomes with poor density, the lowest number of the silicon cells in 1 mm2 and epidermis cells with the thinest walls. This features indicate a poor resistance of Gama cv. against feeding of the pests and give reasons for the presence a much higher number of the cereal leaf beetle larvae (about 100 %) than at the extant two cultivars. Dependence between the thickness of leaf blades and the number of larvae of the infesting pests has not been stated.

16

Wpływ gęstości siewu pszenicy twardej (Triticum durum Desf.) na występowanie przylżeńców

61%

Hurej M., Twardowski J.

Progress in Plant Protection

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2010

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tom 50

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nr 1

The objective of this study was to determine the abundance and species composition of thrips recorded on triticum durum in relation to sowing density. The experiment was set up in the Experimental Field Station of Wrocław University of Environmental and Life Sciences, at Pawłowice, Poland, in 2006–2008. It was conducted on triticum durum plants at two different levels of sowing density: 4 and 7 mln seeds per ha. Thrips were observed on plants directly through the whole vegetative season. For identification of species composition insects were collected from ears of plants at the milk maturity stage of grain. The results of performed studies revealed that there was no statistically significant effect of the sowing plant density on the thrips abundance. However, it was found a tendency of increasing number of Thysanoptera, when the plants were sown at 4 mln seeds per ha. During three years of the research, nine species of thrips were identified from Triticum durum. The predominated species were: Haplothrips aculeatus and Limothrips cerealium.

17

Groźne szkodniki w uprawach zbóż

61%

Walczak F., Mrowczynski M., Wachowiak H.

Agrochemia

|

2000

|

nr 06

18

Nowe zagrozenia upraw rolniczych przez szkodniki ze szczegolnym uwzglednieniem kukurydzy

41%

Mrowczynski M., Pruszynski G., Wachowiak H., Beres P.

Progress in Plant Protection

|

2007

|

tom 47

|

nr 1

323-330

Ograniczanie wyników

Determination of developmental periods of leaf beetle [Oulema spp.] for short-term forecasting

The spring cereals food preferences of Oulema ssp.in pure and mixed crops

Resistance to cereal leaf beetle and bird cherry-oat aphid in winter wheat

Wplyw zerowania larw i chrzaszczy skrzypionki zbozowej [Oulema melanopus L., Coleoptera: Chrysomelidae] na wydzielanie lotnych zwiazkow organicznych przez pszenice [Triticum aestivum L. emend. Fiori et Paol.] oraz reakcja imagines na te komponenty

Nowe szkodniki kukurydzy

Occurrence of pest species of the genus Oulema [Coleoptera: Chrysomelidae] in cereal fields in Northern Poland

Badania nad zastosowaniem nowych insektycydow do zwalczania skrzypionek zbozowych [Lema spp.]

Zagrozenie plonu pszenicy jarej przez szkodniki w gospodarstwie ekologicznym w rejonie Strzyzowa

Studies on leaf beetles [Oulema spp.] development for short-term forecasting - evaluation of effect of temperature and humidity on duration of egg incubation

Szkodliwosc skrzypionek [Oulema spp.] dla zboz jarych w siewach czystych i mieszanych

Badania scisle i wdrozeniowe nad zastosowaniem nowoczesnych insektycydow do zwalczania skrzypionek zbozowych [Lema melanopa L.et L.cyanella Voet.]

Zmienność i rozmieszczenie w Polsce Oulema melanopus [L.] i O. duftschmidi [REDT.] [Coleoptera, Chrysomelidae]

Skuteczność biologiczna oraz wskaźniki ekonomiczne chemicznego zwalczania szkodników w pszenżycie jarym

Nowe szkodniki w uprawie kukurydzy

Cechy anatomiczne lisci trzech odmian pszenicy ozimej [Triticum aestivum L.] a zasiedlanie roslin przez skrzypionki zbozowe, Oulema spp. [Coleoptera, Chrysomelidae]

Wpływ gęstości siewu pszenicy twardej (Triticum durum Desf.) na występowanie przylżeńców

Groźne szkodniki w uprawach zbóż

Nowe zagrozenia upraw rolniczych przez szkodniki ze szczegolnym uwzglednieniem kukurydzy