scholarly journals Susceptibility of defoliated Scots pine to spontaneous and induced attack by Tomicus piniperda and Tomicus minor

Silva Fennica ◽  
1999 ◽  
Vol 33 (2) ◽  
Author(s):  
Erkki Annila ◽  
Bo Långström ◽  
Martti Varama ◽  
Risto Hiukka ◽  
Pekka Niemelä
Keyword(s):  
Scots Pine ◽  
Tomicus Piniperda ◽  
Tomicus Minor

Effects on Growth of Simulated and Induced Shoot Pruning by Tomicus piniperda as Related to Carbohydrate and Nitrogen Dynamics in Scots Pine

1985 ◽  
Vol 22 (1) ◽  
pp. 105 ◽  
Author(s):  
A. Ericsson ◽  
C. Hellqvist ◽  
B. Langstrom ◽  
S. Larsson ◽  
O. Tenow
Keyword(s):  
Scots Pine ◽  
Nitrogen Dynamics ◽  
Tomicus Piniperda

scholarly journals Spatial distribution of losses in growth of trees caused by the feeding of pine shoot beetles Tomicus piniperda and T. minor (Col., Scolytidae) in Scots pine stands growing within range of the influence of a timber yard in southern Poland

2012 ◽  
Vol 52 (No. 3) ◽  
pp. 130-135 ◽  
Author(s):  
A. Borkowski
Keyword(s):  
Spatial Distribution ◽  
Scots Pine ◽  
Basal Area ◽  
Tomicus Piniperda ◽  
Pine Trees ◽  
Pine Stands ◽  
The Difference ◽  
High Level ◽  
Pine Shoot Beetles ◽  
Scots Pine Stands

This study deals with the assessment of increment losses in Scots pine trees caused by the maturation feeding of pine shoot beetles Tomicus piniperda (L.) and T. minor (Hart.) (Col., Scolytidae) in even-aged stands growing during their entire life span within range of the influence of a sawmill and its timber yard. In spring 2004, on three sample plots, 0.2 ha in size, situated 60, 200, and 500 m from the yard, height and dbh of all trees were measured and increment cores were taken from randomly selected sample trees. An agreement between the spatial distribution of losses in tree increments and the distribution of damage to crowns of investigated stands indicated that the losses resulted from the maturation feeding of pine shoot beetles migrating from the sawmill timber yard. Divergence of growth in the about 25-years-old stand indicated the beginning of intensive feeding of beetles in pine shoots with a high level of probability. In comparison with the control stand the basal area losses in stands growing 60 and 200 m from the beetle source amounted to 57% and 46%, respectively. The difference in the height of trees was as large as almost 100%.

ELECTROPHYSIOLOGICAL AND BEHAVIOURAL RESPONSES OF TOMICUS PINIPERDA AND TOMICUS MINOR (COLEOPTERA: SCOLYTIDAE) TO NON-HOST LEAF AND BARK VOLATILES

2000 ◽  
Vol 132 (6) ◽  
pp. 965-981 ◽  
Author(s):  
Fredrik Schlyter ◽  
Qing-He Zhang ◽  
Peter Anderson ◽  
John A. Byers ◽  
Lester J. Wadhams ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Field Trapping ◽  
Green Leaf Volatiles ◽  
Green Leaf ◽  
Tomicus Piniperda ◽  
Leaf Volatiles ◽  
Electroantennographic Detection ◽  
Tomicus Minor ◽  
Pine Shoot Beetles ◽  
Antennal Responses

AbstractLeaf and bark volatiles from non-host birches, Betula pendula Roth. and Betula pubescens Ehrh. (Betulaceae), and aspen, Populus tremula L. (Salicaceae), were tested on spring-dispersing Tomicus piniperda (L.) and Tomicus minor (Hart.) by gas chromatographic – electroantennographic detection (GC–EAD) and by attractant-baited traps in southern Sweden. GC–EAD analysis of the head-space volatiles from fresh bark chips of B. pendula revealed two green leaf alcohols, 1-hexanol and (Z)-3-hexen-1-ol, that consistently elicited antennal responses by T. piniperda and T. minor. Further analyses with synthetic mixtures showed that the antennae of these two Tomicus species also responded to other green leaf alcohols, such as (E)-2-hexen-1-ol found from the non-host leaves, and C8-alcohols, 3-octanol and 1-octen-3-ol, from bark of non-host birches and aspen. No antennal responses of the Tomicus species were observed to green leaf C6-aldehydes and C6-acetate or to non-host bark volatiles like trans-conophthorin, benzaldehyde, salicylaldehyde, and benzyl alcohol. In field trapping experiments, blends of electrophysiologically active green leaf alcohols or C8-alcohols resulted in reductions (> 60%) in the number of T. piniperda captured compared with that for the kairomone-baited trap. When these two blends were combined, trap catch was further reduced (90%), which was not significantly different from that for the blank control. Neither the blend of two green leaf aldehydes plus the acetate nor the bark compounds trans-conophthorin or benzyl alcohol reduced trap catches. Tomicus minor had a response pattern similar to that of T. piniperda. Hylurgops palliatus (Gyll.) (Coleoptera: Scolytidae) was attracted to the combination of kairomone and verbenone but not to kairomone and was not affected by the blends of green leaf volatiles. Our results suggest that selected leaf–bark C6-alcohols and the bark C8-alcohols may have potential in developing semiochemical-based management programs against both pine shoot beetles by repelling them from suitable breeding and feeding sites.

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