[Variation in Thaumetopoea pityocampa infestation rate of Aleppo pine: Effect on dendrometric parameters in the Djelfa region forests (Saharan Atlas, Algeria)].

Autor:	Mecheri H; Département de biologie, faculté des sciences, université Badji-Mokhtar-Annaba, BP 12, 23000 Annaba, Algérie. Electronic address: hadjer_mecheri@ymail.com., Kouidri M; Équipe « Désertification et climat », laboratoire de mécanique, université Amar-Telidji-Laghouat, BP 37, 03000 Laghouat, Algérie. Electronic address: kouidri_moh@yahoo.fr., Boukheroufa-Sakraoui F; Laboratoire des sols et développement durable, université Badji-Mokhtar-Annaba, BP 12, 23000 Annaba, Algérie. Electronic address: ferielboukheroufa@yahoo.fr., Adamou AE; Équipe « Désertification et climat », laboratoire de mécanique, université Amar-Telidji-Laghouat, BP 37, 03000 Laghouat, Algérie. Electronic address: adamou_alaa@yahoo.fr.
Jazyk:	francouzština
Zdroj:	Comptes rendus biologies [C R Biol] 2018 Sep - Oct; Vol. 341 (7-8), pp. 380-386. Date of Electronic Publication: 2018 Aug 31.
DOI:	10.1016/j.crvi.2018.08.002
Abstrakt:	The forests of the Saharan Atlas represent the southern edge of the natural range of the Aleppo pine (Pinus halepensis Mill.). These are exposed to climatic stress in relation to drought and attacks of the pine processionary moth (Thaumetopoea pityocampa Schiff., denoted by CP in the French text). The purpose of our work is to study the variation of the infestation rate by the pine processionary moth and its density with climatic factors and dendrometric parameters. The infestation rate (7.82%) by the pine processionary moth and its density (2.74±2.61nests/tree) were lower in our pine forests than in the northern ones. It appeared that the attacks of the moth increase mainly with the number of days of frost and heatwave. The dendrometric parameters were negatively correlated with the moth's density per tree. On the other hand, the latter was positively correlated with the defoliation rate. The results were discussed in a biogeographic framework in the light of the current knowledge of the distribution of the pine processionary moth in the Aleppo pine, in relation with the climatic conditions. (Copyright © 2018 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.)
Databáze:	MEDLINE
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