| Issue № 1 |
Original research |
pdf-version |
The influence of stands defoliation during the outbreaks of the gypsy moth (Lymantria dispar (L.)) on their sanitary state on the northern border of the range of the phyllophages
| Ponomarev Vasily | D.Sc., Russian Academy of Sciences, Ural Branch: Institute Botanical Garden, Russia 620144 Yekaterinburg, 8 March st., 202a, v_i_ponomarev@mail.ru |
| Klobukov Georgy | Russian Academy of Sciences, Ural Branch: Institute Botanical Garden, Russia 620144 Yekaterinburg, 8 March st., 202a, klobukov_g_i@mail.ru |
| Napalkova Victoria | Russian Academy of Sciences, Ural Branch: Institute Botanical Garden, Russia 620144 Yekaterinburg, 8 March st., 202a, viktoriyaoz@mail.ru |
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Keywords: gypsy moth northern border of range outbreaks defoliation sanitary condition of trees stands |
Summary: One of the main tasks of forest protection is to save the forests from damage during the outbreaks of mass reproduction of forest phyllophagous insects causing their further drying out. One of these species, Gypsy moth (Lymantria dispar (L.)) belongs to the spring-summer phenological group of insects-phylophages. The defoliation of stands during the outbreaks of this species in the main part of its range usually occurs in June and early July, and after that the foliage has time to restore during the vegetative period. Whereas, on the northern boundary of this species range the heat availability is lower compared to other parts of its range, and the effect of defoliation is of considerable interest. The purpose of the study was to monitor stands after defoliation by gypsy moth and to analyze its effect on the sanitary state of the stands depending on the degree and multiplicity of defoliation on the northern border of the outbreaks (south of Sverdlovsk Region). Monitoring was carried out for 7 years after the end of the outbreaks. The changes in the sanitary state of stands and individual trees were analyzed on the basis of visual appraisal of the categories of tree state. For statistical processing, the methods of nonparametric analysis were used. The analysis showed that stands defoliation during gypsy moth outbreaks on the northern border of its range leads to a significant weakening of stands even in the most favorable, steadily fresh forest growing conditions. The results indicate that outbreaks on the northern border of the range of forest insect-phylophages and their consequences require more detailed study due to the high level of their ecological and economic significance. © Petrozavodsk State University |
Received on: 20 September 2018 Published on: 25 March 2019 | |
References
Gninenko Yu. I. Breeding grounds of leaf-eating insects in birch forests of Trans-Urals, Ekologiya. 1974. No. 5. P. 98–101.
Gottschalk K. W. Silvicultural guidelines for forest stands threatened by the gypsy moth. USDA. Gener. Technic. Report. 1993. NE 171. 52 p.
Haukioja E. Induction of defenses in trees, Ann. Rev. Entomol. 1991. Vol. 36. P. 28–42.
Houston D. R. Forest stand relationships, The gypsy moth: research toward integrated pest management, Edited by C. C. Doane, M. L. McManus. Washington, 1981. P. 267–281.
Ierusalimov E. N. Zoogenic defoliation and forest communityM.: Tovarischestvo nauchnyh izdaniy KMK, 2004. 263 p.
Kolesnikov B. P. Forest growth conditions and forest typesSverdlovsk: UNC AN SSSR, 1973. 175 p.
Koltunov E. V. Ponomarev V. I. Fedorenko S. I. Ecology of gypsy moth in the conditions of anthropogenic burdenEkaterinburg: UrO RAN, 1998. 215 p.
Meshkova V. L. Seasonal development of needle-eating insectsHar'kov: Planeta-print, 2009. 396 p.
Planning, organising and forest health monitoring manualM., 2007. 114 p.
Ponomarev V. I. Sokolov G. I. Klobukov G. I. Dynamics of density of Trans-Urals' population of Gypsy moth in 2003-2013, Lesovedenie. 2016. No. 3. P. 76–88.
Ponomarev V. I. Tolkach O. V. Klobukov G. I. Connection of birch stands defoliation by Gypsy moth (Lymantria dispar L.) with the incidence of bacterial dropsy, Izvestiya SPbLTA. Vyp. 202. SPb.: SPBGLTA, 2013. P. 74–85.
Ponomarev V. I., Il'inyh A. V., Sokolov P. L. Kriterii celesoobraznosti zaschity ot nasekomyh-fillofagov bereznyakov Zaural'ya [Expediency criteria of protection of birch Trans-Urals' forests from insects-phillophages// Lesovedenie. 2011. No. 2. P. 13–18.
Sokolov G. I. Lepidopterous pests of birch from summer-autumn group in Chelyabinsk regionEkaterinburg, 2002. 75 p.
Twery M. J., Gottschalk K. W., Smith S. I. Effects of defoliation by gypsy moth, Proceedings, U.S.D.A. gypsy moth research review. 1991. P. 27–39.
Twery M. J., Mason G. N., Wargo P. M., Gottschalk K. W. Abundance and distribution of rhizomorphs of Armillaria spp. in defoliated mixed oak stands in western Maryland, Can. J. For. Res. 1990. Vol. 20. P. 674–678.
Wiley E., Casper B. B., Helliker B. R. Recovery following defoliation involves shifts in allocation that favour storage and reproduction over radial growth in black oak, J. Ecol. 2017. Vol. 105. P. 412–424.
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