Study on Rust Disease of Siberian Larch (Larix sibirica Ledeb.)
UDC 582.751.2:581.461
Abstract
In this study, we present the results of research on rust disease spread in Siberian larch, based on disease samples collected through field surveys in Ovorkhangai, Arkhangai, Zavkhan, Khuvsgul, and Bulgan provinces. The aim was to determine the prevalence and damage of dominant diseases affecting coniferous trees in Mongolia's forest fund, using general phytopathological methodologies. Through route surveys, Siberian larch rust disease was detected in 7 soums of 4 provinces, specifically in 1 point in the Baikal-Forest-Vegetation region, Darkhad provinces Khoshuu; 4 locations in the Central Khangai Khoshuu belonging to the Khangai Forest-Vegetation region; 1 point in the Northeast Khangai Khoshuu; and 3 points in the Southeast Khangai Khoshuu, all within larch-pine and larch-birch forests. The development of rust disease in Siberian larch (Larix sibirica L.) ranged from 0.02-0.14 %, with the highest severity score of 3 in Khuvsgul, Zankhai. Statistical analysis to determine climatic differences between the sampled areas showed relative air humidity differed by 10 days (ANOVA; P < 0.002), with Khuvsgul Khatgal having higher relative air humidity than others.
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