The Gypsy moth Lumantria dispar Linnaeus, 1758 is a widespread and dangerous forest pest of the Republic of Tuva. Outbreaks of phytophage lead to chronic weakening of trees, loss of growth and seeds germination capacity. From 1950 to 2004 research of Gypsy moth in Tyva was carried out by the staff of survey expeditions led by such scientists as O.A. Kataeva G.I. Golutvina, V.A. Sevastyanjuk, N.I. Berdnikova, V.V. Popova and others. The researchers have described the phenology of Gypsy moth, his regional morphological and bioecological features. In the presented work, based on a generalization of the accumulated materials on Gypsy moth in Tuva, an attempt was made to restore the chronology of outbreaks of pest numbers, show their territorial coverage and to propose new approaches to their reconstruction over a longer period in the Republic of Tuva. The results of the study showed that in Tuva four outbreaks of Gypsy moth occurring in 1960, 1969–1983, 1993–2004, 2018 were detected. Outbreaks are of a protracted nature and cover up to 90% of forestries (in some years, the area affected by pest reaches half a million hectares). The most intense outbreaks were observed in the central, part of the republic, in well-heated larch and birch forests - in the Kaa-Khem, Tandinsky, Tes-Khem and Shagonarsky forestries. Further work on the reconstruction of outbreaks of gypsy moths in the Republic of Tuva, significantly exceeding the range of direct observations, can be based on the dendrochronological method using a control tree species that is not affected by the phytophage - Pinus sylvestris L. Analysis of several parameters of the annual ring with subsequent verification of the data obtained with the generalized results of direct observations will improve the accuracy of reconstruction.