Variation in Thaumetopoea pityocampa infestation rate of Aleppo pine: Effect on dendrometric parameters in the Djelfa region forests (Saharan Atlas, Algeria)
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). T...
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Published in | Comptes rendus. Biologies Vol. 341; no. 7-8; pp. 380 - 386 |
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Main Authors | , , , |
Format | Journal Article |
Language | French |
Published |
France
01.09.2018
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Abstract | 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. |
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AbstractList | 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. |
Author | Mecheri, Hadjer Adamou, Ala-Eddine Kouidri, Mohamed Boukheroufa-Sakraoui, Feriel |
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BackLink | https://www.ncbi.nlm.nih.gov/pubmed/30177499$$D View this record in MEDLINE/PubMed |
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DocumentTitleAlternate | Variation du taux d’infestation par Thaumetopoea pityocampa du pin d’Alep : effet sur les paramètres dendrométriques dans les forêts de la région de Djelfa (Atlas saharien, Algérie) |
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Keywords | Aleppo pine Atlas saharien Paramètres dendrométriques Conditions climatiques Climatic conditions Saharan Atlas Pin d’Alep Chenille processionnaire Dendrometric parameters Pine processionary moth |
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Title | Variation in Thaumetopoea pityocampa infestation rate of Aleppo pine: Effect on dendrometric parameters in the Djelfa region forests (Saharan Atlas, Algeria) |
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