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A comparison of accuracy of two methods for the determination of population sizes of sawflies (Diprioninae)

100%

Korczynski I., Remenda K.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2010

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tom 09

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nr 1

The precision of insect number determination in forest litter using a method, in which the sample element comprised 10 plots of 0.5 m2 each, was compared with that of the method, in which the sample element consisted of one plot of 5 m2. Investigations were conducted in four pine stands aged 59-80 years. The number of cocoons of Diprioninae found in the litter was counted. It was found that the precision of the compared methods was very low at a slight density of cocoons and it increased with an increase in their density. It would not be justified to say that the two compared methods of measurement for sawfly cocoon density differ in terms of their precision.

2

Pine sawfly [Diprion pini L.] - related changes in Scots pine crown defoliation and possibilities of recovery

84%

Augustaitis A.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 3

363-369

Recently, outbreaks of pine sawfly (Diprion pini [L.]) became one of the most relevant stresses resulting in widespread deterioration of Scots pine (Pinus sylvestris [L.]) conditions in Central and Northern Europe. At the beginning of the 1990s Lithuania experienced the largest outbreak of Diprion pini L. Field studies were carried out in middle-aged pine stands, exhibiting different degrees of damage caused by pine sawfly, in order to examine the resultant changes in Scots pine defoliation and death probability. “Mirror effect” in defoliation changes from tree decline to recovery was detected. If in the period of pest outbreak the largest pine trees, crown condition of which had been better than that of the other, suffered the most serious needle losses, then in the period of recovery these trees recovered most intensively. Intensity of tree mortality was in relation to stands mean defoliation degree. However, the relative diameter of dead trees did not differ among stands significantly (p>0.05) as suppressed trees died first. No threshold for crown defoliation, exceedance of which would inevitably result in Scots pine tree death, was found.

3

Number of sawfly [Hymenoptera, Diprioninae] cocoons in forest litter at selected distances from anthills

84%

Korczynski I., Skrzypczyk-Adamska B.

Forestry

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2001

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tom 04

4

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New Early Jurassic sawflies from Luxembourg: the oldest record of Tenthredinoidea [Hymenoptera: Symphyta]

84%

Nel A., Pertulevicius J. F., Henrotay M.

Acta Palaeontologica Polonica

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2004

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tom 49

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nr 2

Pseudoxyelocerus bascharagensis gen. et sp. nov., the oldest representative of the Tenthredinoidea and Xyelotomidae, based of a single forewing, and an enigmatic “Symphyta” family incertae sedis, based on a hindwing, are described from the Toarcian of Luxembourg. The relationships of the genera currently included in Xyelotomidae are briefly discussed. The genera Undatoma, Liaotoma, Leridatoma, and Davidsmithia have the unique apomorphy in the wing venation of the Tenthredinoidea minus Xyelotomidae. The Xyelotomidae is probably a paraphyletic family. Only a phylogenetic analysis will help to solve these problems. There is no evidence supporting the previous assignments of the fossil genera Vitimilarva and Kuengilarva to the family Xyelotomidae.

5

Distribution of accessory nuclei in the oocytes of the sawfly, Athalia rosae [Hymenoptera: Tenthredinidae]

84%

Zawadzka M.

Folia Biologica

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1996

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tom 44

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nr 1-2

6

Influence of Fusarium and wheat stem sawfly infestation on volatile compounds production by wheat plants

67%

Piesik D., Wenda-Piesik A., Weaver D. K., Macedo T. B., Morrill W. L.

Journal of Plant Protection Research

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2009

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tom 49

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nr 2

167-174

Plants that were infested by the wheat stem sawfly emitted significantly increased amounts of the secondary metabolites linalool, linalool oxide, ß-farnesene, ß-caryophyllene, and 4-heptanone in comparison to uninfested plants. Wheat plants parasitized by Fusarium species also have emitted volatiles. The amount of volatiles released varied by infective species of Fusarium and volatile patterns varied over time for both sawfly infestation and pathogen infection. Plants that were stressed by both herbivory and pathogens emitted even greater amounts of certain volatiles. Surprisingly, larval sawfly mortality was much greater in plants infected by Fusarium species, and both mortality and the rate of volatile release varied by Fusarium. The role of these plant volatiles are further discussed in the context of defensive plant responses to Fusarium and sawfly infestation.

7

The effect of fungal infection on the hemolymph composition of Neurotoma nemoralis larvae

67%

Bogus M. I., Wloka E.

Pestycydy

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2005

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nr 3

177-181

8

A Turkish isolate of Neodiprion sertifer nucleopolyhedrovirus [NeseSNPV]

67%

Yaman M.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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2003

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tom 51

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nr 4

9

Number of sawfly [Hymenoptera, Diprioninae] cocoons damaged by entomophagous animals in selected distances from a plot with different tree and shrub species

67%

Korczynski I.

Forestry

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2001

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tom 04

10

Communities of birch-leaf-mining sawflies [Hymenoptera: Tenthredinidae] in selected areas of intensive impact of vehicular traffic in Krakow

67%

Pieronek B., Jung J.

Acta Biologica Cracoviensia. Series Zoologia

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1992-1993

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tom 34-35

11

Potencjal nicieni owadobojczych w biologicznym zwalczaniu szkodliwych blonkowek atakujacych drzewa owocowe i parkowe

51%

Tomalak M.

Progress in Plant Protection

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2006

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tom 46

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nr 1

249-255

12

Nowe dane o występowaniu Megalodontesoidea [Hymenoptera: Symphyta] w wschodniej części Lubelszczyzny - cz.2

51%

Piotrowski W.

Wiadomości Entomologiczne

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2002

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tom 21

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