Dimitar Dimitrov

Forest Research Institute - Sofia, Bulgarian Academy of Sciences, 132 St. K. Ohridski Blvd., 1756 Sofia, Bulgaria. E-mail: mitkomit@mail.bg

The aim of the present investigation was to establish the duration of work time and productivity of a mobile forest skyline Koller K 300 in Ograzhden Mountain. The length of the studied roadtrack was 270 m and the transported wood was of Common beech (Fagus sylvatica L.). The terrain investigations were carried out with 107 work courses of loaded carriage for a period of four days. Each work course was divided into nine phases. It was established that most time was used for the work phase 'Motion of the loaded carriage to the landing site' similarly to other terrain investigations. The average productivity was 3.22 m³·h^-1. The results indicate that with a proper organization the forest skyline Koller K 300 could yield very good productivity.

Galina B. Kolganikhina^1* and Ella S. Sokolova²

¹Moscow State University of Forest; 1-ya Institutskaya str., No 1, Mytischy,
Moscow Region, 141005, Russia. ^*E-mail: kolganihina@rambler.ru
²Russian centre of protection of forest; Nadsonovskaya str., No 13,
Pushkino Moscow Region, 141207, Russia. E-mail: rcfh@acha.ru

The present paper presents information on the species composition, features of distribution and harmfulness of dendrotrophic pathogenic fungi, based on long-term observations on the health status and diseases in different types of urban plantings in Moscow and some towns of Moscow suburbs. The survey revealed more than 300 species of pathogenic fungi causing various diseases on roots, trunks, branches, leaves and needles in more than 70 species of coniferous and deciduous trees and shrubs, including a lot of introduced woody plants. Special attention is given to the diseases decreasing durability, protective and aesthetic functions of urban plantings.

Teodors Blija

Latvia University of Agriculture, 2, Liela iela, LV-3001, Jelgava, Latvia. E-mail: blija@inbox.lv

Forest quality and growth sustainability can be influenced by many risk factors throughout the development process: human activity, environmental conditions change, the effects of global warming, water and soil pollution, forest pests and diseases, proliferation, wild animal damage. Ensuring the safety and quality of forest stands of timber approach to consumers needs methods to predict and identify potential risks and determine their potential impact. Real situation calls for new studies in detecting weaknesses and errors in the control and management system for all forest development stages of the technological process. His main objective to explore the food industry HACCP systems proved their worth of applications in the private forestry with the aim to provide customers with stable and high-quality timber resources.

Gradimir Gruychev

Department of Wildlife Management, Faculty of Forestry, University of Forestry, 10 Kliment Ohridski Blvd. 1756 Sofia, Bulgaria. E-mail: gradi.val@gmail.com

Fragments of a scull and lower jaws of Nutria were found near river Maritsa, close to Harmanli town. There are suitable habitats for this species in the area, overgrown with reed and rush near the bank and the islands in the river. The location lies at about 50 km on a straight line from the nearest one known on river Maritsa in Turkey, and at about 35 km from another one in Bulgaria and probably results from invasion of the Nutria along the river.