Research papers

Silvicultural and phytosanitary researches in thinned chestnut coppices at different elevations in Sila (Calabria)


The results of mensurational and phytosanitary researches ten years after thinning trials in chestnut coppices (Castanea sativa Miller) in Sila, are reported.. Eight experimental areas, four located at an average elevation of 1200 m a.s.l. aged 20 yrs and four located on average at 1050 m a.s.l. aged 13 yrs, were compared. Three sub-plots were installed in each area and mensurational and phytosanitary surveys were carried out in 1997 (before and after thinning trials) and ten years later (2007) on 30 stools per sub-plot to assess bio-ecological, structural and compositional status of the standing crops. At each elevation, the experimental protocol included the following theses: thesis T (control: release of the standing crop and removal of dried up stems on the ground, only); thesis A (light thinning: removal of the dominated storey, on average 30% of coppice shoots, poorly shaped, both withered and green); thesis B (moderate thinning: removal from the dominated up to the dominant storey = 43% of the shoots, both dried up and green); thesis C (heavy thinning: removal = 62% of coppice shoots, both withered and green). Results highlighted the significance of thinnings in the cultivation of chestnut coppices. As for silviculture and growth pattern, the surveying ten years later showed the following outcomes: reduction of shoots mortality, according to the thinning intensity from A to C (by comparing the number of dried up coppice shoots surveyed in the control theses); a higher number of coppice shoots in the commercial category “average stems” in the thinned plots; the higher percentage increment in dbh, basal area and volume in the sub-plots undergoing thinning A and C at the elevation of 1050 m and, in general, with thesis C at both elevations; the complete recovery of canopy cover even in the sub-plots heavily thinned. As for the phytosanitary aspects, the research has been oriented on the chestnut blight caused by Cryphonectria parasitica, due to the lack of symptomatology of “ink disease” in the sub-plots, even though present on the same territory. The hypovirulence is predominant and steady with time for the high presence of healing and healed cankers. Among the factors of coppice shoots mortality, blight plays a minor role here. The disease spreads regardless of thinnings and silviculture can operate therefore independently to get a wide range of assortments, from poles to timber. Basically, thinning release has to ensure the predominance and steady presence of hypovirulence in the chestnut stands. In this way, foci for the natural spreading of hypovirulent strains are being created and preserved. This seem to be a basic tool to ensure a phytosanitary equilibrium between the parasite and the host in chestnut coppices, which still represent an important economic resource in Calabria as well as in several other Italian regions.


chestnut coppices; Cryphonectria parasitica; silvicultural management; phytosanitary status

Full Text:

PDF (Italiano)



Amorini E, Manetti M. C., Turchetti T., Sansotta A., Villani F. 2001 - Impact of silvicultural system on Cryphonectria parasitica incidence and on genetic variability in a chestnut coppice in Central Italy. For. Ec. and Manag., 142: 19 -31.

Amorini E., Manetti M. C. 2002 - Selvicoltura nei cedui di castagno. Sostenibilità della gestione e produzione legnosa di qualità. Volume ”Il bosco ceduo in Italia”. Acc. It. Sc. For.: 219-248, Firenze.

Amorini E., Becagli C., Conedera M., Manetti M. C., Pividori M., Zingg A. 2007 - Produzione di legname di qualità da cedui di castagno (Castanea sativa Mill). Confronto tra due diverse modalità colturali. 6° Congresso Nazionale SISEF Arezzo, 25-27 sep. 2007. Contributo n. 6.5.32 [online].

Anagnosta kis S.L. 1977 - Vegetative incompatibility in Endothia parasitica. Expep. Mycol., 1: 306-316.

Avolio S. 1987a - Il castagno nell’Italia meridionale. Cellulosa e Carta, 3: 12-23.

Avolio S. 1987b - Il castagno nell’Italia meridionale. Celluolosa e Carta, 4: 3-13.

Avolio S. 1998 - Analisi ed orientamenti della castanicoltura in Calabria. Atti della “Giornata preparatoria al Secondo Congresso Nazionale di Selvicoltura”: 141-181, Crotone.

Avolio S., Clerici E. 2000 - La valorizzazione dei castagneti calabresi: primo contributo. Ann. CRA Ist. Sper. Selv., Vol.31: 3-25, Arezzo.

Avolio S.., Bernardini V. 2005 - Risultati di diradamenti sperimentali in cedui di castagno calabresi a diversa quota e densità. Atti del IV Convegno Nazionale Castagno 2005: 177-180, Montella.

Avolio S. Clerici E., Turchetti T. 2005 - Paline castanili calabresi: correlazioni tra parametri selvicolturali e impatto della Cryphonectria parasitica. Atti del IV Convegno Nazionale Castagno 2005: 206-210, Montella.

Bonifacio A., Turchetti T. 1973 - Differenze morfologiche e fisiologichein isolati di Endothia parasitica (Murr) And. Ann. Acc. Ital. Sci. For., 22: 111-131, Firenze.

Ciancio O., Menguzzat o G. 1985 - Sull’epoca dei tagli dei cedui di castagno. Ann. Ist. Sper. Selv., XVI: 251-277, Arezzo.

Ciancio O., Nocentini S. 2004 - Cedui di castagno. Volume “Il bosco ceduo Selvicoltura Assestamento Gestione”: 253-259. Acc. Ital. Sci. For., Firenze.

Grente J., Sauret S. 1969 - L’hypovirulence exclusive, phénomène originel en pathologie végétale. C. R. Hebd. Seance Acad. Sci., 268: 2347-2350.

Manetti M. C.. Becagli C., Amorini E. 2007 - Produzione di legname di qualità da cedui di castagno (Castanea sativa Mill). Caratterizzazione degli assortimenti ritraibili a 30 anni. 6° Congresso Nazionale SISEF Arezzo, 25-27 sep. 2007. Contributo n. 6.5.31 [online].

Regione Calabria 2009 - Consultazione banca dati meteoidrologici. A.R.P.A.CAL. [On Line]

Regione Calabria 2007 - Piano Forestale Regionale 2007-2013. Assessorato Agricoltura, Foreste e Forestazione.

Regione Calabria 2003 - I suoli della Calabria. Programma Interregionale Agricoltura - Qualità, Misura 5: 1-387. ARSSA

Servizio Agropedologia. Turchetti T. 1978 - Some observation on the “Hypovirulence” of

chestnut blight in Italy. Proceedings of the American Chestnut Symposium: 92-94, Morgantown (WV) U.S.A.

Turchetti T. 1994 - Some aspects of natural spread of Hypovirulence in Italy. Proc. I International chestnut Conference Morgantown 1992, Ed. by Double M.L., Mac Donald W.H.., Morgantown University Press: 161 – 164.

Turchetti T., Ferretti F., Maresi G., 2008 - Natural spread of Cryphonectria parasitica and persistence of hypovirulence in three Italian coppiced chestnut stands. For. Path. 38: 227-243.

Turchetti T., Addario E., Maresi G., 2009 - Situation and evolution of sanitary status in chestnut stands. Proceedings of the 1st European Congress on Chestnut - Castanea 2009. Acta Horticulturae.

Copyright (c)

Creative Commons License

All texts reported in and all materials directly downloadable from this page are licensed under a Creative Commons Attribution 4.0 International License.