The wood mechanical properties changes of norway spruce dying and dead tree

The article contains results of the studies of influence of tree death prescription on the mechanical properties of dead wood in the centers of Norway spruce shrinkage. It was found that the strength and exploitative qualities of spruce wood are reduced in the direct proportion to the increase of tree death prescription. At the same time mechanical properties of wood are reducedslightly with the age of dead tree up to 5 years

Assessment of biological efficiency of existent insecticides against forest pests

The results of testing and assessment of biological efficiency of several current insecticides from neonicotinoids against pests of forest stands are reviewed. Their high efficiency against biting and suctorial pests of coniferous and deciduous stands is revealed. Application of the insecticides has led to reduction of pine stands damage caused by different groups of pests by 69.9–100%, of birch stands against aphides 100%. Obtained data are given to the firms for registration of the insecticides in the forest stands

Assessing of the biological effectiveness of the biological preparation Aktofit approved for use in the FSC-certified forestries

Use of all registered in the “State Register ...” insecticides except Aktara, W DG was banned in the FSC-certified forest enterprises of the Republic of Belarus since September 2015. Registration trials of a biological product Aktofit 0.2%, CE for protection of harvested timber from spruce stems pests, as well as against Aradus cinnamomeus un the pine stands were conducted in field conditions. In applying the drug Aktofit 0.2%, CE mortality of parental generation of ba rk beetles after treatment at a concentration of 0.4 and 0.5% on third day was 80.9 and 86.6%, and on the seventh day – 82.2 and 89.9%, respectively. In tests on pine stands insecticide Aktofit 0.2%, CE showed a fairly high efficiency against A. cinnamomeus Panz. The use of this preparation to the flow rate of 0.5 and 0.6 l/ha provided the biological effectiveness on the seventh day of 68.9 and 73.4% respectively, which is comparable with the level of the model chemical insecticide Tanrek, WDC (0.5 l/ha) recommended for use in forest stands. Application of biological products is not contrary to FSC policy that makes it possible to use Aktofit in the forestry

The comparative analysis of a state of spruse stands state on the constant test of forestry’s

Data on the volume of the current and general attrition at the constant experimental plats in spruce stands in the forestry’s during 2004–2013 are analysed. According to the forestry’s and the results of own inspections of the constant experimental plats, the comparative analysis of the spruce stands state on constant experimental plats of Tolochin forestry, Cherven forestry, Chausy forestry and Borisov skilled forestry is made. As a result dynamics of state changes in spruce stands at the experimental plats for 2011–2014 and dynamics of dead wood formation in spruce stands is presented. The current as-sessment of the constant experimental plats condition on the average category of state and according to the current and general attrition is also given. The reasons of difference between our and forestry data on the assessment of a condition of spruce stands on constant trial squares are analysed and discussed. It is established that in a number of the surveyed constant experimental plats of the forestry’s there is an overestimate of an assessment of a condition of spruce forest stands that can lead to an inexact assessment of current state of spruce plantings in a number of regions of the republic

Registration tests of insecticide Viriy, CS on forest stends pests

Insecticide viriy, CS (tiakloprid, 245 g/l, distri butorship is SLL “Frandesa”, Belarus) from the group of neonicotinoides was tested on the pests of forest stands. The insecticide aktara, WSG, competent on the forest stands, was an etalon. The tests of viriy, CS against suctorial pests – Aradus cinna-momeus Panz. with rate of application at 0.6 l/ha have provided for almost 90% biological effectiveness on seventh day, against Cinara pinea Mord. and other aphides with rate of application at 0.3 and 0.4 l/ha – about 100%. Viriy, CS with rate of application at 0.5 l/ha ha ve showed efficacy against weevil beetles up-to-date of 94.4%, with rate of application at 0. 4 l/ha – 88.9%. It is higher than etalon aktara, WSG. On the deciduous trees application of viriy, CS against alder leaf-eating larvae has given a high performance with rate of application at 0.5 l/ha (death-rate on seventh day was 97.9%), and with rate of application at 0.4 l/ha the efficacy was closely related to etalon aktara, WSG with the same rate of application. Trials with viriy, CS against aphides on birch with rate of application at 0.3 and 0.4 l/ha sup-plied with biological effectiveness of insecticide practi cally up-to-date of 100%. As a result of trials insecticide viriy, CS was registered for ad aptation in forest stands against pests

The comparative analysis of a state of spruse stands state on the constant test of forestry’s

Data on the volume of the current and general attrition at the constant experimental plats in spruce stands in the forestry’s during 2004–2013 are analysed. According to the forestry’s and the results of own inspections of the constant experimental plats, the comparative analysis of the spruce stands state on constant experimental plats of Tolochin forestry, Cherven forestry, Chausy forestry and Borisov skilled forestry is made. As a result dynamics of state changes in spruce stands at the experimental plats for 2011–2014 and dynamics of dead wood formation in spruce stands is presented. The current as-sessment of the constant experimental plats condition on the average category of state and according to the current and general attrition is also given. The reasons of difference between our and forestry data on the assessment of a condition of spruce stands on constant trial squares are analysed and discussed. It is established that in a number of the surveyed constant experimental plats of the forestry’s there is an overestimate of an assessment of a condition of spruce forest stands that can lead to an inexact assessment of current state of spruce plantings in a number of regions of the republic

The wood mechanical properties changes of norway spruce dying and dead tree

The article contains results of the studies of influence of tree death prescription on the mechanical properties of dead wood in the centers of Norway spruce shrinkage. It was found that the strength and exploitative qualities of spruce wood are reduced in the direct proportion to the increase of tree death prescription. At the same time mechanical properties of wood are reducedslightly with the age of dead tree up to 5 years

Assessment of biological efficiency of existent insecticides against forest pests

The results of testing and assessment of biological efficiency of several current insecticides from neonicotinoids against pests of forest stands are reviewed. Their high efficiency against biting and suctorial pests of coniferous and deciduous stands is revealed. Application of the insecticides has led to reduction of pine stands damage caused by different groups of pests by 69.9–100%, of birch stands against aphides 100%. Obtained data are given to the firms for registration of the insecticides in the forest stands

Registration tests of insecticide Viriy, CS on forest stends pests

Insecticide viriy, CS (tiakloprid, 245 g/l, distri butorship is SLL “Frandesa”, Belarus) from the group of neonicotinoides was tested on the pests of forest stands. The insecticide aktara, WSG, competent on the forest stands, was an etalon. The tests of viriy, CS against suctorial pests – Aradus cinna-momeus Panz. with rate of application at 0.6 l/ha have provided for almost 90% biological effectiveness on seventh day, against Cinara pinea Mord. and other aphides with rate of application at 0.3 and 0.4 l/ha – about 100%. Viriy, CS with rate of application at 0.5 l/ha ha ve showed efficacy against weevil beetles up-to-date of 94.4%, with rate of application at 0. 4 l/ha – 88.9%. It is higher than etalon aktara, WSG. On the deciduous trees application of viriy, CS against alder leaf-eating larvae has given a high performance with rate of application at 0.5 l/ha (death-rate on seventh day was 97.9%), and with rate of application at 0.4 l/ha the efficacy was closely related to etalon aktara, WSG with the same rate of application. Trials with viriy, CS against aphides on birch with rate of application at 0.3 and 0.4 l/ha sup-plied with biological effectiveness of insecticide practi cally up-to-date of 100%. As a result of trials insecticide viriy, CS was registered for ad aptation in forest stands against pests

Assessing of the biological effectiveness of the biological preparation Aktofit approved for use in the FSC-certified forestries

Use of all registered in the “State Register ...” insecticides except Aktara, W DG was banned in the FSC-certified forest enterprises of the Republic of Belarus since September 2015. Registration trials of a biological product Aktofit 0.2%, CE for protection of harvested timber from spruce stems pests, as well as against Aradus cinnamomeus un the pine stands were conducted in field conditions. In applying the drug Aktofit 0.2%, CE mortality of parental generation of ba rk beetles after treatment at a concentration of 0.4 and 0.5% on third day was 80.9 and 86.6%, and on the seventh day – 82.2 and 89.9%, respectively. In tests on pine stands insecticide Aktofit 0.2%, CE showed a fairly high efficiency against A. cinnamomeus Panz. The use of this preparation to the flow rate of 0.5 and 0.6 l/ha provided the biological effectiveness on the seventh day of 68.9 and 73.4% respectively, which is comparable with the level of the model chemical insecticide Tanrek, WDC (0.5 l/ha) recommended for use in forest stands. Application of biological products is not contrary to FSC policy that makes it possible to use Aktofit in the forestry