M. TIAIBA Ammar

In Algeria, potatoes ranks second among the twenty main food crops. It’s characterized by periods of overproduction corresponding to seasonal crops. Except these periods, supply tends to fall. In order for the availability of potatoes to be constant throughout the non-harvest periods, it is imperative to store the surplus production to ensure a constant supply during periods of unavailability of a new harvest. The storage of the potato must maintain a satisfactory quality and minimize losses and the postharvest development of bacteria and fungi. This work aims to identify and follow the evolution of pectinolytic Erwinia and Erwinia soft rot during storage at 4 and 10° C of two varieties of potato grown in Algeria, i.e. Spunta and Désirée. The results indicated the presence of three species of Erwinia: E. carotovora subsp. carotovora, E. carotovora subsp. atroseptica and E. chrysanthemi. Initially, for both varieties, E. carotovora subsp. carotovora predominates followed by E. carotovora subsp. atroseptica and finally E. chrysanthemi. During storage, the three species evolve almost in the same way and their multiplication is more important at 10° C than at 4° C, particularly on the Spunta. About the total bacteria, the highest levels are recorded on Spunta, especially at 10° C. In addition, the Erwinia spp. / total bacteria ratio showed that Erwinia spp. are very most abundant compared to the total bacteria. The assessment of soft rot losses has also shown that they are greater in the Spunta variety whether at 4 or 10° C.
Keywords: Erwinia spp., Postharvest soft rot, Potato, Variety, Storage temperature

Congrès scientifique international Algéro-Tunisien consacré aux sujets de la valorisation des ressources naturelles et de la biosurveillance

The apricot tree has a great capacity of adaptation to the dry climate of Wilaya of M'sila, this study with for goal to know the behavior of four varieties; apricot tree in the area of Boukhmissa (area of M'sila), through observations on the ground in order to follow the various stages phenologie of the tree. The results obtained show that the most adapted varieties are the variety Paviot and Red Louzi because their phenology is in harmony with the conditions of the medium of the arid area of M'sila. Two early varieties; Tounsi and Bulida are adapted to this area because of the coincidence of their flowering with the period of cold Spring which led to a disturbance of the output.

Key words: Apricot tree, Boukhmissa, varieties, behavior, characterization, Algeria

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Natural Product Screening for Drug Discovery
The seminar is devoted to the analytical methods for screening and profiling natural substances

Ce travail consiste à identifier et à suivre l’évolution de la mycoflore susceptible de se développer sur tubercules de pomme de terre (PDT) en cours de conservation frigorifique à 04 et à 10° C et une HR de 80%. Deux variétés largement cultivées et consommées en Algérie ont été retenues, i.e. la Spunta et la Désirée. Les tubercules des deux variétés, dont l’origine géographique est la région de Ain Defla (Algérie), sont répartis en quatre lots expérimentaux en tenant compte les deux facteurs étudiés à savoir la variété et la température de conservation. Chacun des lots est constitué de trois caisses en PVC à raison de 15kg de PDT par caisse. La conservation est conduite pendant 21semaines en chambres froides. L’isolement des espèces fongiques à partir des tubercules a permis d’identifier quatre champignons présents de façon constante, il s’agit de Fusarium solani, F. oxysporum, Rhizoctonia solani et Alternaria solani. La fréquence d’apparition des espèces montre que la variété n’affecte pas la nature des espèces car les deux variétés laissent développer les même champignons, Néanmoins, l’effet variétal est significatif (P < 0,01) quand il s’agit de la dominance des espèces. Sur Spunta c’est R. solani qui prédomine alors que sur Désirée c’est le F. solani. Quant à l’évolution de la flore fongique, il s’avère que l’inoculum initial est à priori plus élevé sur Spunta que sur Désirée. Au delà, une légère augmentation du nombre des champignons est observée à 10 °C contrairement à 4 °C où il tend à baisser. A la fin des trois premières semaines de stockage, la mycoflore se multiplie plus rapidement à 10 qu’à 4 °, cette tendance est presque inchangée pour le reste de la durée de conservation. Les niveaux de la flore fongique restent supérieurs sur Spunta que sur Désirée. L’effet significatif de la variété (P < 0,01) est statistiquement vérifié.
Mots clés : Pomme de terre, Variété, Flore fongique, Conservation frigorifique.

Cet ouvrage se consacre à la description de l’une des maladies les plus dévastatrices des cultures de légumineuses alimentaires à savoir l’ascochytose ex anthracnose. Il met l’accent surtout sur l’épidémiologie de la maladie, la biologie et l’écologie des agents pathogènes qui en sont la cause, particulièrement ceux causant l’ascochytose sur pois et sur pois chiche, étant donné qu’en Algérie ces deux légumineuses sont parmi les plus cultivées et les plus consommées et qui subissent le plus de dégâts de l’ascochytose.

L’écosystème steppique couvre de grandes étendues en Algérie, il est caractérisé particulièrement par sa biodiversité et sa variabilité phytogénétique qui se manifestent, entre autres, par le développement d’un grand nombre d’espèces végétales, connues surtout pour leur richesse en métabolites secondaires. La bioactivité fongicide des ces derniers n’est plus à démontrer. Plusieurs phytocomposés sont déjà intégrés dans des stratégies de gestion des maladies des plantes cultivées. A cet effet et en vue de valoriser des plantes steppiques et de contribuer au développement d’une agriculture durable, écoresponsable et protectrice de l’environnement et de la santé publique que nous avons réalisé des bioessais dans le but d’étudier l’effet in-planta ou in-vivo des extraits végétaux de Artemisia alba Turra et de Peganum harmala Linn., plantes poussant spontanément dans la steppe du Hodna (Algérie), sur la sévérité de l’ascochytose du pois chiche et les composantes pathogéniques de l’agent causal, i.e. Didymella rabiei (Kovatschevski) Arx. Les tests consistent à appliquer à 1,5, 03 et 06%, des traitements séparés aux extraits végétaux, des plants de pois chiche sur lesquels l’ascochytose est provoquée artificiellement. Au terme des bioessais, les extraits appliqués à 06% n’ont provoqué aucune phytotoxicité apparente comparativement aux traitements témoins et fongicide conventionnel. L’évaluation de la sévérité de l’ascochytose révèle que les niveaux de la maladie sont significativement affectés par le facteur dose de l’extrait et l’origine botanique de ce dernier (P < 0,01). Certes, les deux extraits se sont montrés moins efficaces que le fongicide conventionnel, néanmoins l’extrait de P. harmala réduit notablement la sévérité de la maladie. Les deux extrait semble également influencer remarquablement (P < 0,01) les composantes épidémiologiques du pathogène en allongeant ses durées d’incubation et de latence, particulièrement fortes concentrations d’extrait.

Mots clés: Steppe, Artemisia alba, Peganum harmala, Ascochytose, Didymella rabiei, Epidémiologie.

Cette communication se veut une contribution pour mettre la lumière sur un problème qui touche à la santé publique. Il s’agit de la présence d’antibiotique (AB) et/ou de résidus d’antibiotiques (RAB) dans les aliments et dont l’origine est les pratiques d’antibiothérapie dans les élevages d’animaux de rente. En élevage les AB sont utilisés à des buts, thérapeutique, prophylactique, métaphylactique et comme additifs alimentaires ou promoteur de croissance. Le recours à l’antibiothérapie non encadrée et le non respect des consignes d’utilisation, particulièrement la posologie et le délai d’attente après traitement, conduisent à la présence d’AB et/ou de RAB dans les denrées d’origine animale tels que la viande, les abats et le lait. En dépit des accidents technologiques qui peuvent avoir lieu dans les process de transformation des produits animaux, la présence d’AB et/ou de leurs résidus dans les aliments ne va pas sans de graves méfaits sur la santé humaine et animale ainsi que sur l’environnement. Ces méfaits se manifestent surtout par l’antibiorésistance et l’apparition et la dissémination de souches bactériennes pathogènes résistantes aux traitements antibiotiques. En Algérie très peu de travaux ont été consacrés à ce sujet et les données sont très rares. A titre indicatif, Tarzaali et al., (2008) rapportent que 89,09% d’échantillons de laits provenant des élevages sises dans l’Algérois contenaient des résidus des tétracyclines alors que, les résidus des β-lactamines se trouvaient dans 65,46% des lait analysés. Dans le même sens, Aggad (2009) a pu détecter la présence de résidus d’agents antibactériens dans 29% d’échantillons de lait produit dans l’Oranie.

Mots clés : Antibiotiques, Résidus d’antibiotiques, Elevage, Aliment, Antibiorésistance.

Le sucrage ou LTS pour low temperature sweetening, est une altération post récolte affectant la pomme de terre (PDT) de consommation courant une conservation frigorifique. Il se manifeste par l‘accumulation de sucres réducteurs (SR) tels que le glucose et le fructose suite à l‘hydrolyse enzymatique de l‘amidon. Ces sucres constituent le substrat des brunissements non-enzymatiques ou réaction de Maillard, aboutissant ainsi à la détérioration de la qualité culinaire et technologique des PDT. Ce travail consiste à suivre, durant 21 semaines d‘entreposage à 04 et 10° C, l‘évolution de la teneur en amidon et en SR chez deux variétés de PDT i.e. la Spunta et la Désirée afin d‘évaluer leur comportement vis-à-vis du sucrage suivant la température de conservation. Le suivie des paramètres étudiés montre que les teneurs en amidon sont à priori différentes et la Désirée semble contenir plus d‘amidon que la Spunta. Sous les effets favorables et conjugués des facteurs variété, température et durée de conservation (P < 0,01), les lots de la Désirée présentent les teneurs les plus élevées comparativement à ceux de la Spunta. Contrairement aux teneurs en amidon, les deux variétés contiennent au départ pratiquement les mêmes proportions en SR. En revanche, ces teneurs subissent de fortes variations sous les effets significatifs (P < 0,01) des facteurs variété, température et durée d‘entreposage. Les lots conservés à 4° C accumulent plus de SR que ceux conservés à 10° C. A 4° C, les teneurs en SR se trouvent caractérisées par des pics de teneurs correspondant à la période qui s‘étale entre la 9ème et la 15ème semaine. Au-delà et malgré leur tendance baissière, que se soit à 10° C ou à 4° C, les teneurs restent plus importantes à 4 °C comparativement à 10 °C avec un comportement variétal qui s‘avère inchangé.

Mots clés : Pomme de terre, Conservation, Température, Amidon, Sucres.

This work consists of studying the effect of crude extracts of eight plants growing in the Algerian steppe against Ascochyta pisi Lib., one of the members of the Ascochyta complex causing the As- cochyta blight of pea, with the aim of substituting them for chemical fungicides recognized for their harmfulness to the environment and public health. For this purpose, an in-vitro biocontrol test of the growth and sporulation of A. pisi was achieved by adding to its cul- tural medium a crude plant extracts or their sub-fractions. At the end of this trial, we found that the extracts of Artemisia alba Turra, Lycium arabicum Schweinf. Ex Boiss. and Peganum harmala Linn. recorded the best growth inhibition rates of pathogenic whereas, Artemisia campestris L. is more effective against its sporulation.

Key words: Ascochyta blight, Pea, Growth inhibition, Sporulation, Steppe plants, Crude extract.

Journée d'Etude et de Sensibilisation Régionale sur la Leishmaniose Cutanée dans le Basin du Hodna

Le présent travail consiste à un essai in-vitro de biocontrôle de la croissance et de la sporulation de Ascochyta pisi, l’un des membres du complexe Ascochyta causant l’ascochytose du pois, en additionnant dans son milieu de culture des extraits végétaux bruts ou leurs sous-fractions.
• Huit extraits végétaux de plantes testées i. e. Artemisia alba, Artemisia compestris, Cleome arabica, Lycium arabicum, Peganum harmala, Thapsia garganica, Thymelea hirsuta et Thymelea microphylla, entrainent une inhibition de la croissance et de la sporulation de Ascochyta pisi.
• Sur ces huit plantes, les extraits bruts de A. alba, L. arabicum, et P. harmala ont enregistré les meilleurs taux d’inhibition de la croissance alors que A. compestris est plus efficace contre la sporulation ;
• Les différentes sous-fractions des extraits issus de A. alba et L. arabicum ont agit favorablement en inhibant la croissance, en particulier la sous-fraction F4 mais différemment en ce qui concerne la source d’extrait où A .pisi semble plus sensible aux sous-fractions de A. alba qu’aux sous-fractions de L. arabicum.

Mots clés : Ascochyta, pois, croissance, sporulation, plante, extrait.

Algeria is vast country which presents several bioclimatic stages and agro-ecological which supports the production, a multitude of agricultural produce. The steppe forms integral part of this extent of which importance is hardly lower than the other areas. Hodna is in the middle of the Algerian steppe, it is a relatively degraded basin of 25000 km2, consequence of a prolonged dryness and an overgrazing. This study is devoted to the diagnosis of the current location of the perimeter of the plain of M'sila which is in the Western Northern zone of the basin of Hodna on a geographical area of a surface of 780 km2. The population is dense in North with the existence of an urban centre and a relatively populated rural area in the South, the population is less dense with relatively distant urban centers. The plain of M'sila receives an annual rain average of 213.20 mm, the rains of Autumn are sometimes torrential which gives birth to abrupt risings and devastators. The thermal amplitude of the station of M' sila is of 35.02°C. The dominant winds are the wind of West known as Dahraoui, wind of North known as Bahri and the Sirocco which is hot wind and blowing dryness of the South and which blocks the development of the cultures by accentuating their drying. The diagram ombrothermic allows to identify existence; only one period of 3 months dryness, the end of May at the end of August. The zone study is made up an alluvial plai. nof low altitudes, <400 m made of alluvial deposits of quaternary (alluvia, clays and sands) with a soft slope <3%, pertaining to steppe bioclimatic stage. The ground is not very advanced of alluvial contribution with limono-argillaceous texture rather deep. Occupation of the ground by the vegetation is diversified, one noted a broad diversity of the agricultural activity which settled current the last years which exceeds 54,700 ha, the fallow exceed half of agricultural surfaces during the agricultural partner 2009/2010, the cultivation of cereals which occupies 36% of the grounds followed by the fodder cultures and fruit-bearing arboriculture at a rate of 5 and 4%, respectively. The exploration of the not cultivated plant species of the area study, counts 550 tax relating to the steppe communities with Chott El Hodna. One finds there many species endemic with the area of Hodna such as Saccocalyx saturoides, Arnebia decumbens and Linaria laxiflora that one finds only in this area. As well as endemic species North African such as Muricaria prostrata, Loncophora capiomontiana, Rhanterium suaveolens, Stippa tenacissima L., Artimisia herba alba, Anabasis oropediorum L., Salsola vermiculata L., Atriplex halimus and Salicornia arabica L. The zone of study, like the majority of the steppe zones is with vocation agropastorale with manpower of the ovine breeding bordering the 130.000. The zone study belongs to the large catchment area of Chott El Hodna, characterized by a very dense hydrographic network where the rivers take their sources in the mounts of Hodna, the principal river is El-K's ob. The near total of water of the plain of M'sila has a temperature which varies between 21.5 and 22°C, this translated by a strong corrosion of the casing of the drillings. The majority of water of this plain have a strong conductivity, therefore a degree of raised mineralization in the event of irrigation with this salt water charged one can expect falls of outputs.

Algeria is vast country which presents several bioclimatic stages and agro-ecological which supports the production, a multitude of agricultural produce. The steppe forms integral part of this extent of which importance is hardly lower than the other areas. Hodna is in the middle of the Algerian steppe, it is a relatively degraded basin of 25000 krrr', consequence of a prolonged dryness and an overgrazing. This study is devoted to the diagnosis of the current location of the perimeter of the plain of M'sila which is in the Western Northern zone of the basin of Hodna on a geographical area of a surface of 780 km2 The population is dense in North with the existence of an urban centre and a relatively populated rural area in the South, the population is less dense with relatively distant urban centers. The plain of M'sila receives an annual rain average of 213.20 mm, the rains of Autumn are sometimes torrential which gives birth to abrupt risings and devastators. The thermal amplitude of the station of M'sila is of35.02°C. The dominant winds are the wind of West known as Dahraoui, wind ofN orth known as Bahri and the Sirocco which is hot wind and blowing dryness of the South and which blocks the development of the cultures by accentuating their drying. The diagram ombrothermic allows to identify existence; only one period of 3 months dryness, the end of May at the end of August. The zone study is made up an alluvial plain of low altitudes, <400 m made of alluvial deposits of quaternary (alluvia, clays and sands) with a soft slope <3%, pertaining to steppe bioclimatic stage. The ground is not very advanced of alluvial contribution with limono-argillaceous texture rather deep. Occupation of the ground by the vegetation is diversified, one noted a broad diversity of the agricultural activity which settled CUITenthe last years which exceeds 54,700 ha, the fallow exceed half of agricultural surfaces during the agricultural partner 2009/201 0, the cultivation of cereals which occupies 36% of the grounds followed by the fodder cultures and fruit-bearing arboriculture at a rate of 5 and 4%, respectively. The exploration of the not cultivated plant species of the area study, counts 550 tax relating to the steppe communities with Chott El Hodna. One finds there many species endemie with the area of Hodna such as Saccocalyx saturoides, Arnebia decumbens and Linaria laxiflora that one finds only in this area. As well as endemie species North African such as Muricaria prostrata, Loncophora capiomontiana, Rhanterium suaveolens, Stippa tenacissima L., Artimisia herba alba, Anabasis oropediorum L., Salsola vermiculata L., Atriplex halimus and Salicornia arabica L. The zone of study, like the majority of the steppe zones is with vocation agropastorale with manpower of the ovine breeding bordering the 130.000. The zone study belongs to the large catchment area of Chott El Hodna, characterized by a very dense hydrographie network where the rivers take their sources in the mounts of Hodna, the principal river is El-K'sob. The near total ofwater of the plain of M'sila has a temperature which varies between 21.5 and
22°C, this translated by a strong corrosion of the casing of the drillings. The majority of water of this plain have a strong conductivity, therefore a degree of raised mineralization in the event of irrigation with this salt water charged one can expect falls of outputs.

Key words: Hodna, biodiversity, course, steppe, culture, plain of M'sila

The apricot tree has a great capacity of adaptation to the dry climate of Wilaya of M'sila, this study with for goal to know the behavior of four varieties; apricot tree in the area of Boukhmissa (area of M'sila), through observations on the ground in order to follow the various stages phenologic of the tree. The results obtained show that the most adapted varieties are the variety Paviot and Red Louzi because their phenology is in harmony with the conditions of the medium of the arid area of M'sila. Two early varieties; Tounsi and Bulida are adapted to this area because of the coincidence of their flowering with the period of cold Spring which led to a disturbance of the output.

The culture of the apricot tree in the area of Boukhmissa, wilaya of M’sila passes by one critical period which requires an immediate rectification; this degradation is due to several factors of a nature ecological, agronomic, economic and social. The climate change, the water quality of irrigation and the absence of a network of drainage are among the ecological elements which worsen this situation. The agronomic factor contributes in a direct way to this decline as the lack of diversity in varieties, the ageing of the orchards of
apricot trees and the ignorance of the modern farming techniques by the farmers of the area. The lack of maintenance of the orchards is due to the economic factor because of the dearness of the products necessary like to their scarcities on the local market. Finally the social factor which will worsen even more this situation, because of the division continual of the orchards between heirs, the ageing of the hands of open specialized, the exodus of the young farmers towards other less painful activities and the last element it is the invasion of the masonries on the orchards, which will reduce way marked the surfaces devoted to the culture of the apricot tree. All these factors can cause a total renunciation of the orchards of apricot tree, which will end up disappearing with the profit from the urbanization or the replacement by other plant species like the olive-tree or cereals.

The culture of the apricot tree in the area of Boukhmissa, wilaya of M’sila passes by one critical
period which requires an immediate rectification; this degradation is due to several factors of a nature
ecological, agronomic, economic and social. The climate change, the water quality of irrigation and the absence
of a network of drainage are among the ecological elements which worsen this situation. The agronomic factor
contributes in a direct way to this decline as the lack of diversity in varieties, the ageing of the orchards of
apricot trees and the ignorance of the modern farming techniques by the farmers of the area. The lack of
maintenance of the orchards is due to the economic factor because of the dearness of the products necessary
like to their scarcities on the local market. Finally the social factor which will worsen even more this situation,
because of the division continual of the orchards between heirs, the ageing of the hands of open specialized,
the exodus of the young farmers towards other less painful activities and the last element it is the invasion
of the masonries on the orchards, which will reduce way marked the surfaces devoted to the culture of
the apricot tree. All these factors can cause a total renunciation of the orchards of apricot tree, which will end
up disappearing with the profit from the urbanization or the replacement by other plant species like the
olive-tree or cereals.
Key words: Apricot tree Boukhmissa Factors of degradation M’sila Arboriculture

Of share its situation inside the country, the area of Hodna, wilaya of M'sila, presents hot southernmost influences very interesting for an early product arboriculture. Surface occupied by this culture with passed of 3200 ha in 2001 to 6750 ha during the year 2006. Boukhmissa, is one of the most important arboriculture areas of Hodna, it contains an important collection of varieties of apricot tree, with various categories of age. Our study consists to evaluate and diagnose the situation of the culture of apricot tree in the area of Boukhmissa. A dry climate, following semi-arid bioclimatic stage with one cold winter and a very hot dry summer characterize the area of study. Being precipitations, the zone receives approximately 300 mm/an. The ground is of muddy type with alkaline pH (8.38) with an electric conductivity equalizes with 10.18 µs/cm.
Useful agricultural surface on 140 ha, being occupied by several cultures: Arboriculture 57 ha, cultivation of cereals 40 ha, market gardening 15 ha. These cultures all are led in irrigated system. Arboriculture accounts for 40.71% of the whole of the practised cultures. Among the various fruit-bearing species, which exist the apricot tree, is more dominating, with 90% of the orchards. Indeed, it has been about a speculation inherited a generation to another for several decades. Concerning the old one of the orchards, they are distributed as follows: 30% are lower than 10 years, 45% between 10 to 30 years and 25% are higher than 30 years. For the varieties, we find mainly Bullida 47%, Paviot 21%, red Louzi 17% and Tounsi 15%. As regards production, the statistics reveal strong increases passing in 4899q with 216000q, nevertheless the outputs remain weak and fluctuate one year to another according to the climatic conditions on the one hand and the ageing of the orchards and the plant health situation on the other hand.

La région du Hodna est l’une des zones les plus productives d’abricot en Algérie, cette
culture stratégique héritée d’une génération à une autre. L’abricot est un fruit riche en vitamines
et en fibres. Plusieurs variétés cultivées sont très adaptées et très productives, une partie du
surplus de production est transformé en abricot sec. Différentes modes industrielles de séchage
sont utilisées dans le monde comme le séchage au four ou au séchoir. Dans la région du Hodna,
wilaya de M’sila, on pratique le séchage traditionnel ou le séchage au soleil à l’air libre en
pendant 3 semaines, le fruit se déshydrate, mais la qualité est très médiocre comparativement au
séchage industriel. La région du Hodna doit bénéficier de petites structures de transformation
d’abricot en fruits secs pour englober le surplus et aider au développement économique et social
de la région.
Mots clés: Hodna - Abricot - Séchage traditionnelle - Fruit sec - Climat aride - Conservation.

La région du Hodna est l’une des zones les plus productives d’abricot en Algérie, cette
culture stratégique héritée d’une génération à une autre. L’abricot est un fruit riche en vitamines
et en fibres. Plusieurs variétés cultivées sont très adaptées et très productives, une partie du
surplus de production est transformé en abricot sec. Différentes modes industrielles de séchage
sont utilisées dans le monde comme le séchage au four ou au séchoir. Dans la région du Hodna,
wilaya de M’sila, on pratique le séchage traditionnel ou le séchage au soleil à l’air libre en
pendant 3 semaines, le fruit se déshydrate, mais la qualité est très médiocre comparativement au
séchage industriel. La région du Hodna doit bénéficier de petites structures de transformation
d’abricot en fruits secs pour englober le surplus et aider au développement économique et social
de la région.
Mots clés: Hodna - Abricot - Séchage traditionnelle - Fruit sec - Climat aride - Conservation.

Of share its situation inside the country, the area of Hodna, wilaya of M'sila, presents hot
southernmost influences very interesting for an early product arboriculture. Surface occupied by this culture
with passed of 3200 ha in 2001 to 6750 ha during the year 2006. Boukhmissa, is one of the most important
arboriculture areas of Hodna, it contains an important collection of varieties of apricot tree, with various
categories of age. Our study consists to evaluate and diagnose the situation of the culture of apricot tree in the
area of Boukhmissa. A dry climate, following semi-arid bioclimatic stage with one cold winter and a very hot
dry summer characterize the area of study. Being precipitations, the zone receives approximately 300 mm/an.
The ground is of muddy type with alkaline pH (8.38) with an electric conductivity equalizes with 10.18 µs/cm.
Useful agricultural surface on 140 ha, being occupied by several cultures: Arboriculture 57 ha, cultivation of
cereals 40 ha, market gardening 15 ha. These cultures all are led in irrigated system. Arboriculture accounts for
40.71% of the whole of the practised cultures. Among the various fruit-bearing species, which exist the apricot
tree, is more dominating, with 90% of the orchards. Indeed, it has been about a speculation inherited a
generation to another for several decades. Concerning the old one of the orchards, they are distributed as
follows: 30% are lower than 10 years, 45% between 10 to 30 years and 25% are higher than 30 years. For the
varieties, we find mainly Bullida 47%, Paviot 21%, red Louzi 17% and Tounsi 15%. As regards production, the
statistics reveal strong increases passing in 4899q with 216000q, nevertheless the outputs remain weak and
fluctuate one year to another according to the climatic conditions on the one hand and the ageing of the
orchards and the plant health situation on the other hand.
Key words: Boukmissa area Arid stage Valorisation Apricot tree M'sila