scholarly journals Effect of fertilization and watering of Scots pine seedlings on the feeding preference of the pine weevil (Hylobius abietis L.).

Silva Fennica ◽  
1992 ◽  
Vol 26 (2) ◽  
Author(s):  
Jukka Selander ◽  
Auli Immonen
Keyword(s):  
Scots Pine ◽  
Feeding Preference ◽  
Hylobius Abietis ◽  
Pine Weevil ◽  
Pine Seedlings

Forest management practices in reduction of damage caused by Pine weevil (Hylobius abietis L.) and Cervidae animals in newly planted Scots pine forests.

2021 ◽  
Author(s):  
Kārlis Dūmiņš ◽  
Sigita Timma ◽  
Dagnija Lazdiņa
Keyword(s):  
Forest Management ◽  
Scots Pine ◽  
Tree Species ◽  
Forest Regeneration ◽  
Management Practices ◽  
Hylobius Abietis ◽  
Pine Weevil ◽  
Forest Management Practices ◽  
Pine Seedlings ◽  
Soil Preparation

<p><strong>Key words</strong>: forest regeneration, Conniflex, Trico, mechanical site preparation</p><p>Forest regeneration is crucial stage in commercial forest management because actions during this stage impact future forest productivity and value. Scots pine is one of the main tree species in forestry of the northern part of Europe. Foresters have to overcome different risk factors during regeneration process and two of them are seedling damage by Pine weevil (<em>Hylobius abietis</em> L) and browsing by herbivores of <em>Cervidae</em> family. Pine weevil is one of the main forest pests in Europe that damage regenerated coniferous stands. Damage caused by this pest can produce 70% mortality of planted seedlings. Another significant risk factor is browsing. With increase of deer <em>(Cervidae)</em> population the damaged forest area also increases to the extent that foresters choose other tree species for regeneration. The mitigation of these risks is possible with appliance of forest management practices.  There are used different repelents against Cervidae animals.  Regarding Pine weevil, due to restrictions on insecticide use in EU, different protective coating materials have been developed, and several studies show that soil preparation before planting reduce amount of damaged Pine seedlings and increase possibility of successful regeneration.  We evaluated if and how forest management methods - soil preparation techniques (spot mounding, disc trenching) in combination with different plant protection products (Conniflex, Trico) - affects the degree of damage caused by pine weevil and <em>Cervidae</em> animals to Scots pine seedlings one and two years after outplanting in four forest stands in Latvia. The results from this study shows that application of Conniflex reduce number of damaged trees by 16.8% first and 20.3% second year after outplanting compared to untreated seedlings. Soil preparation has significant impact on reduction of pine weevil damage. The best results have been achieved by planting with Conniflex treated seedlings on spot mounds (2.4% damaged trees compared to 48.9% in unprepared soil without treatment). Repellent Trico do not provide additional protection against Pine weevil and do not have long term protection effect against browsing. Overall conclusion is that combination of soil preparation and use of appropriate coating material (Conniflex) can provide sufficient protection without usage of insecticides, and Trico has to be applied before winter season to achieve effect of protection.</p>

scholarly journals Effect of buds manually removal and their damage by large pine weevil (Hylobius abietis L.) on Scots pine seedlings in Siversky Donets river valley

2018 ◽  
pp. 113-120
Author(s):  
Valentyna L. Meshkova ◽  
Iryna M. Sokolova ◽  
Serhii O. Yeroshenko ◽  
Lesya M. Koval
Keyword(s):  
Scots Pine ◽  
Stem Bark ◽  
Hylobius Abietis ◽  
Height Increment ◽  
Pine Weevil ◽  
Apical Bud ◽  
Apical Buds ◽  
Lateral Buds ◽  
Pine Seedlings ◽  
Quantitative Influence

Large pine weevil (Hylobius abietis L.) damages different organs of Scots pine (Pinus sylvestris L.) seedlings in unclosed plantations, including foliage, buds, stem bark and roots. Simulated damage of respective organs, particularly debudding is one of the ways to evaluate qualitative and quantitative influence of such damage on tree condition. The aim of research was to evaluate the dependence of Scots pine seedlings mortality and height increment on artificial and large pine weevil caused bud damage. The growth of apical shoots of Scots pine seedlings was registered since the beginning of May to the end of June. Development of new shoots in seedlings with manually bud removal or large pine weevil damage started in beginning of May and continued in July. Mortality of Scots pine seedlings with 20% of lateral buds damaged did not differ from that in undamaged plants. The seedlings with apical and lateral buds manually removed as well as with apical and over 70% lateral buds damaged by large pine weevil have died in the year of treatment or damage. The seedlings with apical buds damaged as well as with apical and over 50% lateral buds damaged died in the 4th year after damage. Removal or damage up to 50% lateral buds did not affect the growth of Scots pine seedlings. Height increment of seedlings with apical buds manually removed or damaged by large pine weevil did not differ significantly in May and June of the year of treatment or damage. In July the height increment was statistically greater in the variant with manually removal of apical bud. Previously suggested scale of Scots pine seedlings bud damage satisfactory reflects the score of large pine weevil injuriousness. We can suggest that height increment in the next years after bud damage does not depend on damage way and intensity but mainly on ecological conditions.

Induced defenses change the chemical composition of pine seedlings and influence meal properties of the pine weevil Hylobius abietis

2016 ◽  
Vol 130 ◽  
pp. 99-105 ◽  
Author(s):  
Lina Lundborg ◽  
Frauke Fedderwitz ◽  
Niklas Björklund ◽  
Göran Nordlander ◽  
Anna-Karin Borg-Karlson
Keyword(s):  
Chemical Composition ◽  
Induced Defenses ◽  
Hylobius Abietis ◽  
Pine Weevil ◽  
Pine Seedlings

ASSOCIATION OF PHYTOPATHOGENIC FUNGI FOR THE SCOTS PINE (PINUS SYLVESTRIS L.) WITH THE EUROPEAN PINE WEEVIL HYLOBIUS ABIETIS (L.) (COL. CURCULIONIDAE)

1994 ◽  
Vol 126 (4) ◽  
pp. 929-936 ◽  
Author(s):  
J. Lévieux ◽  
D. Piou ◽  
P. Cassier ◽  
M. André ◽  
D. Guillaumin
Keyword(s):  
Scots Pine ◽  
Pathogenic Fungi ◽  
Phytopathogenic Fungi ◽  
Infection Process ◽  
Contamination Rate ◽  
Hylobius Abietis ◽  
Pine Weevil ◽  
Leptographium Procerum ◽  
Ophiostoma Piliferum ◽  
Scanning Electron

AbstractIn 1989 and 1990, the contamination rate of the European pine weevil Hylobius abietis (L.) by several pathogenic fungi for the Scots pine was measured [Leptographium procerum (Kendrick) Wingf. — 45% of the specimens; Pachnodium canum (Upadh. and Kendr.) — 14%; or Ophiostoma piliferum (Fries) H. and P. Syd — 3% (Piou 1993)]. To understand the processes of transportation, a detailed study was conducted by scanning electron microscopy. Several types of spores vectored are found mainly in the thoracic cuticular rounded wells located near the sensorial setae. These wells are connected with an epidermal glandular apparatus whose ultrastructural description is given. We question the origin and composition of these secretions which are believed to protect the spores and contribute to the infection process.

scholarly journals Application of methyl jasmonate reduces growth but increases chemical defence and resistance against Hylobius abietis in Scots pine seedlings

2005 ◽  
Vol 115 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Juha Heijari ◽  
Anne‐Marja Nerg ◽  
Pirjo Kainulainen ◽  
Heli Viiri ◽  
Martti Vuorinen ◽  
...  
Keyword(s):  
Methyl Jasmonate ◽  
Scots Pine ◽  
Chemical Defence ◽  
Hylobius Abietis ◽  
Pine Seedlings
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