Contribution of feeding by European pine sawfly larvae to litter production and element flux in Scots pine plantations

1985 ◽  
Vol 15 (3) ◽  
pp. 484-487 ◽  
Author(s):  
W. H. Fogal ◽  
F. Slansky Jr.
Keyword(s):  
Scots Pine ◽  
Tree Height ◽  
Litter Production ◽  
Litter Fall ◽  
Branch Number ◽  
Sawfly Larvae ◽  
Pine Sawfly ◽  
Element Input ◽  
Tree Component ◽  
European Pine Sawfly

The contribution of larvae of the European pine sawfly, Neodiprionsertifer (Geoff.), to litter fall and element input was determined in two contiguous 25-year-old plantations of Scots pine (Pinussylvestris L.) near Glencairn, Ont., in 1972. Tree spacings were 1.2 × 1.2 and 1.8 × 1.8 m. Tree diameters, numbers of needle-bearing branches per tree, and the number of larval colonies per tree were greater in the less dense plantation. On the other hand, there was no difference between plantations with respect to tree height, number of needles per branch, number of larvae per colony, or percent defoliation. For the denser and less dense plantations, frass was the largest insect-derived component of litter fall at 804 and 1255 kg ha−1, respectively; needles constituted the major tree component of litter fall at 1107 and 929 kg ha−1, respectively, and the total combined contribution of tree and insect material to litter fall was 2395 and 2744 kg ha−1, respectively. Average element input (kilograms per hectare) to the soil via frass for the two plantations was greatest for nitrogen (6.9), followed by potassium (5.0), calcium (4.1), phosphorus (0.8), and magnesium (0.6).

Needle Removal by Pine Sawfly Larvae Increases Branch-Level VOC Emissions and Reduces Below-Ground Emissions of Scots Pine

2013 ◽  
Vol 47 (9) ◽  
pp. 4325-4332 ◽  
Author(s):  
Rajendra P. Ghimire ◽  
Juha M. Markkanen ◽  
Minna Kivimäenpää ◽  
Päivi Lyytikäinen-Saarenmaa ◽  
Jarmo K. Holopainen
Keyword(s):  
Scots Pine ◽  
Voc Emissions ◽  
Sawfly Larvae ◽  
Pine Sawfly ◽  
Below Ground

Oviposition and Larval Performance of European Pine Sawfly in Relation to Irrigation, Simulated Acid Rain and Resin Acid Concentration in Scots Pine

Oikos ◽  
1995 ◽  
Vol 74 (2) ◽  
pp. 273 ◽  
Author(s):  
K. Saikkonen ◽  
S. Neuvonen ◽  
P. Kainulainen
Keyword(s):  
Acid Rain ◽  
Scots Pine ◽  
Acid Concentration ◽  
Resin Acid ◽  
Simulated Acid Rain ◽  
Larval Performance ◽  
Pine Sawfly ◽  
European Pine Sawfly

scholarly journals The dynamics of the spread of pine sawfly in the forests of the Bryansk region

2015 ◽  
Vol 5 (1) ◽  
pp. 54-65
Author(s):  
Кистерный ◽  
Grigoriy Kisternyy ◽  
Шепель ◽  
Igor Shepel
Keyword(s):  
Weather Conditions ◽  
Forest Litter ◽  
Pine Plantations ◽  
Fodder Trees ◽  
Sawfly Larvae ◽  
Pine Sawfly ◽  
Pest Outbreaks ◽  
Wide Range ◽  
Definition Of ◽  
European Pine Sawfly

On the basis of forest pathology survey of pine plantations of the Bryansk region for the period of 2011-2014, the nature of the centers of the European pine sawfly is studied and the reasons for their change are established. Works are made in the definition of the number of larvae per one tree in the growth phase of the outbreak, cocoons, male adults, and the sanitary conditions of pine forests on 5 plots in pest outbreaks are evaluated. The area of distribution of foci ranged from 896.6 to 8176.8 ha depending on the year of survey and prevailed in maturing pine plantations. There was a wide range of defoliation of trees - from mild to complete. Average condition category of plots in pine plantations, partially restored after damage was 1.84-2.42. The average number of sawfly larvae per tree has reached an average of 308 pieces. Previously unknown method for selecting the place of their cocoon - a thicker crust of fodder trees is discovered. Relatively low density of sawfly cocoons in the forest litter - 1-17 pcs/m2 is set. At the regional level for the first time, to assess the intensity of the flight of the European pine sawfly and prognosis of foci used pheromone traps were used. The number of males caught in traps varied over wide limits. Mixed results when comparing the two observation periods in 2013 and 2014 are got and the dependence of flight on the weather conditions at that time is shown. Broad ecological plasticity of this species in its ability to form foci in various conditions is confirmed.

Weak responses of pine sawfly larvae to high needle flavonoid concentrations in scots pine

1992 ◽  
Vol 18 (3) ◽  
pp. 271-282 ◽  
Author(s):  
Stig Larsson ◽  
Lennart Lundgren ◽  
Clifford P. Ohmart ◽  
Rolf Gref
Keyword(s):  
Scots Pine ◽  
Sawfly Larvae ◽  
Pine Sawfly

SELECTION OF OVIPOSITIONAL SITES BY THE EUROPEAN PINE SAWFLY, NEODIPRION SERTIFER (HYMENOPTERA: DIPRIONIDAE), ON SCOTS PINE

1975 ◽  
Vol 107 (7) ◽  
pp. 761-768 ◽  
Author(s):  
Yvan J. Hardy ◽  
Douglas C. Allen
Keyword(s):  
Scots Pine ◽  
Neodiprion Sertifer ◽  
Pine Sawfly ◽  
European Pine Sawfly ◽  
Resin Canals ◽  
Oviposition Sites ◽  
Selection Of

AbstractOn Scots pine, Neodiprion sertifer prefers the lowermost needle of fascicles on the distal one-third of shoots for oviposition. The amount of divergence between needles in a fascicle may influence the selection of oviposition sites, as the needles were further apart in egg-bearing fascicles. The interior diameter of resin canals was significantly greater on egg-bearing than non-egg-bearing needles.

Parasitism of the European Pine Sawfly, Neodiprion sertifer (Geoff.) (Hymenoptera: Diprionidae), in Southwestern Ontario

1958 ◽  
Vol 90 (4) ◽  
pp. 223-225 ◽  
Author(s):  
L. R. Finlayson ◽  
Thelma Finlayson
Keyword(s):  
Neodiprion Sertifer ◽  
Experimental Investigations ◽  
Sawfly Larvae ◽  
Pine Sawfly ◽  
European Pine Sawfly ◽  
Small Vial

Cocoons of Neodiprion sertifer (Geoff.) were collected in southwestern Ontario in 1941, 1943, 1946, 1947, and 1949 for experimental investigations at the Belleville laboratory. A total of 8,326 cocoons were collected, mainly within about eight miles northeast and east of Sarnia, Ont., but a few were collected at Strathroy and Brigden, Ont. Each cocoon was incubated separately in a small vial so that each parasite could be associated with the host cocoon from which it emerged. Sawflies emerged from 68 per cent of the cocoons and parasices from 12 per cent; dissection of the remaining cocoons showed 16 per cent contained dead sawfly larvae and pupae, and four per cent dead parasite larvae.

Estimation of nuclear polyhedrosis virus produced in field populations of the European pine sawfly, Neodiprion sertifer (Geoff.) (Hymenoptera: Diprionidae)

1983 ◽  
Vol 61 (8) ◽  
pp. 1857-1861 ◽  
Author(s):  
W. J. Kaupp
Keyword(s):  
Inclusion Bodies ◽  
Nuclear Polyhedrosis Virus ◽  
Direct Result ◽  
Neodiprion Sertifer ◽  
Sawfly Larvae ◽  
Pine Sawfly ◽  
Early Instar ◽  
European Pine Sawfly ◽  
Nuclear Polyhedrosis ◽  
Appreciable Reduction

The quantity of virus measured as the number of polyhedral inclusion bodies (PIBs) produced and liberated at death from two diseased European pine sawfly (Neodiprion sertifer (Geoff.)) populations was studied over a 3-year period in Britain. As high as 2.3 × 1015 PIBs/ha were produced as a resut of a natural epizootic in one of the populations. Subsequent years saw an appreciable reduction in the quantity of the virus produced, a direct result of the reduction in the number of sawfly larvae infesting each plot. Polyhedra persisting over winter in the host's environment were found to alter the nature of subsequent epizootics by causing virus infection to occur at an earlier stage of larval development than previously observed. This increased the percentage contribution of PIBs from the death of early instar larvae to the total amount of virus produced.

Monitoring the European pine sawfly with pheromone traps in maturing Scots pine stands

2006 ◽  
Vol 8 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Paivi Lyytikainen-Saarenmaa ◽  
Martti Varama ◽  
Olle Anderbrant ◽  
Mikko Kukkola ◽  
Anna-Maija Kokkonen ◽  
...  
Keyword(s):  
Scots Pine ◽  
Pheromone Traps ◽  
Pine Sawfly ◽  
Pine Stands ◽  
European Pine Sawfly ◽  
Scots Pine Stands

scholarly journals Estimation of Genetic Parameters and Wood Yield Selection Index in a Clonal Trial of Korean Pine (Pinus koraiensis) in Northeastern China

2021 ◽  
Vol 13 (8) ◽  
pp. 4167
Author(s):  
David Kombi Kaviriri ◽  
Huan-Zhen Liu ◽  
Xi-Yang Zhao
Keyword(s):  
Selection Index ◽  
Tree Height ◽  
Stem Volume ◽  
Korean Pine ◽  
Branch Number ◽  
Basal Diameter ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Stem Straightness ◽  
Clonal Trial

In order to determine suitable traits for selecting high-wood-yield Korean pine materials, eleven morphological characteristics (tree height, basal diameter, diameter at breast height, diameter at 3 meter height, stem straightness degree, crown breadth, crown height, branch angle, branch number per node, bark thickness, and stem volume) were investigated in a 38-year-old Korean pine clonal trial at Naozhi orchard. A statistical approach combining variance and regression analysis was used to extract appropriate traits for selecting elite clones. Results of variance analysis showed significant difference in variance sources in most of the traits, except for the stem straightness degree, which had a p-value of 0.94. Moderate to high coefficients of variation and clonal repeatability ranged from 10.73% to 35.45% and from 0.06% to 0.78%, respectively. Strong significant correlations on the phenotypic and genotypic levels were observed between the straightness traits and tree volume, but crown breadth was weakly correlated to the volume. Four principal components retaining up to 80% of the total variation were extracted, and stem volume, basal diameter, diameter at breast height, diameter at 3 meter height, tree height, and crown height displayed high correlation to these components (r ranged from 0.76 to 0.98). Based on the Type III sum of squares, tree height, diameter at breast height, and branch number showed significant information to explain the clonal variability based on stem volume. Using the extracted characteristics as the selection index, six clones (PK105, PK59, PK104, PK36, PK28, and K101) displayed the highest Qi values, with a selection rate of 5% corresponding to the genetic gain of 42.96% in stem volume. This study provides beneficial information for the selection of multiple traits for genetically improved genotypes of Korean pine.

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