Pine weevil (Hylobius abietis L.) injuries and their control by DDT in Scots pine seedling stands

Nenonen, Martti; Jukola, Juhani

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Silva Fennica no. 104 article id 4693 | 1960 | Article

Martti Nenonen , Juhani Jukola

Tukkimiehen täin (Hylobius abietis L.) tuhoista mäntytaimistoissa ja niiden torjunnasta DDT :n avulla.

Nenonen M., Jukola J. (1960). Tukkimiehen täin (Hylobius abietis L.) tuhoista mäntytaimistoissa ja niiden torjunnasta DDT :n avulla. Silva Fennica no. 104 article id 4693. https://doi.org/10.14214/sf.a9132

English title: Pine weevil (Hylobius abietis L.) injuries and their control by DDT in Scots pine seedling stands

Abstract

The aim of the study was to find out more about pine weevil (Hylobious abietis L.) injuries in Scots pine (Pinus sylvestris L.) seedling stands and their control by means of DDT. For this purpose, inventories were made of seedling stands established earlier. Control experiments were made on burnt areas by planting seedlings dipped in a DDT emulsion.

The results of the inventories show that injuries caused by pine weevils can, in certain circumstances, especially in seedling stands established by planting, cause the complete failure in artificial regeneration. The extent and quality of the injuries vary greatly according to planting method, treatment of the cutting area, age of the seedling stand, environmental factors, and weather conditions. The most extensive injuries occur in regeneration areas of old Norway spruce stands burnt after clear cutting and planted with Scots pine seedlings. Injuries are greater in seedling stands established by planting, especially after broadcast burning, than in seedling stands originating either from artificial or natural seeding. The quality of the patch for sowing or planting has a considerable effect on the quantity and character of the injuries: in a patch from which organic matter has been removed, injuries do not appear or they are slighter. Seedlings can be protected effectively and economically by dipping their tops up to the root collar, in a DDT emulsion before planting.

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Keywords
Pinus sylvestris; soil preparation; Scots pine; planting; Hylobius abietis; insecticides; seedling damages; insect damages; DDT

Published in 1960

Available at https://doi.org/10.14214/sf.a9132 | Download PDF

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