To evaluate the response of the olive tree cultivars Meski and Chetoui to nutrient stress, a comp... more To evaluate the response of the olive tree cultivars Meski and Chetoui to nutrient stress, a complete privation of major nutrients such as nitrogen (N), phosphorus (P), magnesium (Mg), and potassium (K) was chosen. Mineral composition, vegetative development, starch accumulation and their evolutions and distributions in the different compartment of the tree were studied. The survey of mineral diagnosis showed significant modification of the tree mineral alimentation, as well as cationic and anionic at varying degrees. Synergistic and antagonistic actions of the mineral elements were registered, reinforced by the imposed nutrient stress. The distribution of dry matter in the various organs of the olive tree cultivars was affected. The removal of nitrogen seemed to favor the allocation of carbon from leaves to roots. The effect of phosphorus deprivation was marked particularly on the development of the root system which seemed to be small, sparse and poorly developed. Important starch...
La methode thermique pour la determination de la densite de flux de seve et celle pour mesurer le... more La methode thermique pour la determination de la densite de flux de seve et celle pour mesurer les potentiels hydriques foliaire et xylemique ont ete utilisees chez l'olivier de table sous differents regimes hydriques. Les mesures ont ete effectuees du 24-10-2004 au 30-11-2004 au cours de deux phases, l'une a irrigation optimale et l'autre au cours du dessechement du sol. L'essai a ete installe dans un verger d'olivier de table et principalement sur les deux varietes les plus diffusees en Tunisie, la Meski et la Picholine. Cette etude a montre qu'au cours de la phase irriguee, la Meski a presente une densite de flux de seve et une conductance hydraulique plus elevees de 30%. Alors que l'arret de l'irrigation pendant la deuxieme phase a affecte le flux de seve et la conductance, mais differemment selon les varietes, la reduction est de 43% chez la Picholine et de 78% chez la Meski.
The tomato leafminer miner, Tuta absoluta (Meyrick) (Lepidoptera, Gelechiidae) is an important in... more The tomato leafminer miner, Tuta absoluta (Meyrick) (Lepidoptera, Gelechiidae) is an important insect pest of greenhouse tomatoes, Lycopersicon esculentum in Tunisia. The damages are severe and caused huge economic losses. Because no threshold levels are available for T. absoluta, many growers are applying chemicals at a calendar-based interval in which up to 20 sprays are provided. In order to diminish pesticide applications and to preclude damages to leaves and fruits, the implementation of a threshold level for optimum timing of chemical applications is required. A study was conducted in Saheline region of Tunisia to compare 8 alternative strategies for the control of the tomato leafminer, Tuta absoluta under greenhouse during two tomato cropping seasons in 2010 and 2011. The intervention protocols (strategies) included (1) ST1 = density of 1-4 galleries or larvae per plant , (2) ST2 = density of 5-8 galleries or larvae per plant, (3) ST3 = 9-16 galleries or larvae per plant (4) ...
Four organically-farming allowed insecticides, Neem extract (Oleorgan at 30%), Rotenone extract (... more Four organically-farming allowed insecticides, Neem extract (Oleorgan at 30%), Rotenone extract (Rotorgan at 5%) and two products of Potassium salt of fatty acid (Kabon at 50% and Biosoap at 49%), were field tested for the control of mealy aphids Hyalopterus pruni complex (Homoptera: Aphidoidea) in almond orchard in 2008 and 2009 in Tunisia. The experiment was arranged in a randomized block design consisting of 5 replications each consisted of 2 trees. The substances were applied three times in 2008 (on 8 April, on 14 April and on 6 May) and twice in 2009 (on 27 March and 10 April). In 2008, a significant decrease in densities of aphids per leaf (small larva, medium larvae and apterous adults), 6 days after the first treatment compared with control. These densities remain low during 5 weeks thereafter. The effectiveness of these products was confirmed in 2009 trial in comparison with control, however, the highest aphid population suppression was found with the application of Neem fo...
Olive (Olea europaea L.) production is marked by annual oscillations as trees alternate from high... more Olive (Olea europaea L.) production is marked by annual oscillations as trees alternate from high to low crop loads in successive years. Gas exchanges and carbohydrate content of leaves and fruits in olive tree (O. europaea cv. Besbassi) were monitored at pit hardening and fruit ripening. After fruit set, three crop loads were applied (100%, 50% and 25% of the initial fruit load) by manual thinning. Severe fruit thinning reduced photosynthesis, stomatal conductance and intercellular CO2 concentration. Crop load had no significant effect on chlorophyll fluorescence parameters. The reduction of 75% of the initial crop load favoured the accumulation of starch in leaves and soluble sugars in leaves and fruits. The reduction in initial fruit load had a significant positive effect on the current year’s shoot elongation and on inflorescence number the following spring. To increase the fruit size, a strong thinning (75%) was necessary, which coincided with the highest shoot vigour. Moderate...
The almond bark beetle, Scolytus amygdali Geurin-Meneville, is responsible for significant loss o... more The almond bark beetle, Scolytus amygdali Geurin-Meneville, is responsible for significant loss of fruit production in almond orchards throughout the world. Here, we studied the damage and the incidences of S. amygdali attack on two different scales: (1) at the level of a single tree; and (2) in an entire orchard. Our results revealed no differences in attack level among four orientations (east, west, south and north sides) for the whole tree. However, the bark that was facing west side in the direction of the prevailing wind was found to be the most suitable for females to initiate attack in Stratum S2. Attack distribution remains the same among different strata (strata is vertical divisions of the tree from the ground to the uppermost twigs with ~40 cm intervals). More than 50% of attack was observed in the trunk of the tree and upper strata. However, multiplication rate (number of emerged adults/maternal gallery) varies significantly between strata. In addition, we studied attack...
In the present study, methanol, acetone and petroleum ether extracts of olive leaves were investi... more In the present study, methanol, acetone and petroleum ether extracts of olive leaves were investigated for their insecticidal activity against Myzus persicae and deterrent effect on Phthorimaea operculella under laboratory conditions. Different concentrations 0.1%, 1% and 10% were implemented in the experiment. The results revealed that acetone and methanol extracts caused 100% mortality of M. persicae at 10%. Tests on P. operculella generated a very pronounced deterrence of oviposition and larval penetration at 10%. Data indicate that, the acetone extract proved to be most deterrent against larval penetration at 10 % in comparison with other tested extracts and concentrations with 71.7% of deterrent index. Moreover, the highest deterrent effect of oviposition was recorded to acetone extract with 25.9%, 65.2% and 93.3% at 0.1, 1 and 10%, respectively. Therefore, this study provides first report on the insecticidal and deterrent activities of olive leaf extracts against M. persicae a...
Field experiments were conducted in 2005 on orange, Citrus sinensis (L.) Osbeck, var. Thomson in ... more Field experiments were conducted in 2005 on orange, Citrus sinensis (L.) Osbeck, var. Thomson in two different sites, Sbikha and Sidi Bouali, in Tunisia to assess the effectiveness of kaolin, spinosad and malathion against the Mediterranean fruit fly (medfly), Ceratitis capitata (Wiedemann) (Diptera Tephritidae). In both study sites, the materials were applied 3 times (kaolin at a concentration of 5 kg formulated product /100 l, spinosad at a concentration of 1 l formulated product /ha and malathion at a concentration of 200 ml formulated product /100 l). The efficacy of the different treatments was evaluated by assessing male captures in modified Steiner traps and fruit damage (punctured and dropped fruits). The results indicated that (1) no significant differences among treatments in male captures were detected (2) fruit damage (no. punctured fruits and fallen fruits) was lower on kaolin-treated trees than on spinosad, malathion, and untreated trees. Kaolin successfully protected ...
This work aims to develop alternatives to chemical sprays for the control of the tomato leafminer... more This work aims to develop alternatives to chemical sprays for the control of the tomato leafminer, Tuta absoluta (Lepidoptera, Gelechiidae). Thus, were evaluated in 2014 in two greenhouses planted with tomatoes during the period of intense insect activity through March to May, two techniques: Male mass trapping and cultural control. In plots conducted under mass trapping a high density of pheromone Jackson trap (120 per ha) was used and in plots conducted under cultural control, manual removal of T. absoluta damaged tomato leaf and fruits was carried out regularly usually at weekly interval. Results indicated that on the whole, both techniques showed low effectiveness in the reduction of insect infestation compared with control. The densities of T. absoluta biological stages (eggs, young larvae and old larvae) and empty galleries per tomato leaflet did not vary between plots dedicated to mass trapping and cultural control compared with control at 5 sampling dates respectively 7, 17,...
Natural enemies have been the key factor for the regulation of the citrus leafminer populations, ... more Natural enemies have been the key factor for the regulation of the citrus leafminer populations, Phyllocnistis citrella, since its introduction in Spain in 1993. The use of various broad-spectrum insecticides in citrus has been banned in recent years. This has led to an increase in the abundance and importance of the complex of generalist predators that inhabit the citrus canopy. In this work, we hypothesize that the incidence of P. citrella and the impact of its natural enemies would have changed due to the greater presence of generalist predators. Following the same protocols used in previous studies, three orchards located in Valencia, the major citrus-growing area of Spain, were monitored during 2017–2018. The incidence of P. citrella has decreased from 1.8 to 2.4 mines per leaf in 2006 to 0.93–1.98 in 2017–2018. This decrease could be attributed to the 43.0% increase of mortality by natural enemies compared to 2006. Currently, predation is the most important mortality factor. P...
Chaetoptelius vestitus (Mulsant & Rey, 1861) is a serious pest of pistachio trees in the world. T... more Chaetoptelius vestitus (Mulsant & Rey, 1861) is a serious pest of pistachio trees in the world. This insect attacks live trees that suffer from poor growing conditions (e.g. non-irrigated and unmanaged trees surrounded by fallen dry branches, prolonged drought, etc.). In addition to Iran (Ziaaddini et al., 2002), the pistachio bark beetle is present in Syria (Lababidi, 1998), Algeria (Chebouti-Meziou et al., 2011), Iraq (Abu Yaman, 2009), Italy (Fabbri and Valenti, 1998), Turkey (Turanli and Sütçü, (2009), Greece (Fragoulis, 2004) and in other pistachio producing countries in the Middle East. Biology and damage of C. vestitus were studied by Chebouti-Meziou et al., (2009) and also its bioecology (Rizk et al., 1981a, b, c). In Tunisia, C. vestitus is considered to be a major pest of pistachio trees (Braham and Jardak, 2012). It affects both buds and bark parts of the pistachio tree (Chebouti-Meziou et al., 2006). C. vestitus is univoltine, having one generation that emerges in winter...
In this study, a one-year field experiment was conducted to evaluate the effect of winter tree pr... more In this study, a one-year field experiment was conducted to evaluate the effect of winter tree pruning severity on the abundance, population dynamics and shoot infestation as well as vegetative growth of two citrus cultivars Clementine, C. clementina Hort. Ex Tan. and orange, Citrus sinensis cv Thomson by the Spirea aphid, Aphis spiraecola Patch (Hemiptera, Aphididae) and its natural enemies. Data were collected during the spring in 2015 on 6-years old Citrus trees submitted to 3 different intensities pruning (severe, medium or control and light pruning) following a completely randomized design with five replications in which one single tree-plot was considered as a replicate. Results showed that, for both Citrus cultivars, pruning enhanced the sprouting of newly shoots, the shoot elongation and the number of leaves per shoot especially for Clementine cultivar. The average number of newly growing shoots per tree was maximum in heavy pruned trees (5593±315 shoots per tree) and minimu...
Field studies were conducted to evaluate the influence of colored pan water traps and aging of ph... more Field studies were conducted to evaluate the influence of colored pan water traps and aging of pheromone dispenser on the capture of the tomato leafminer, Tuta absoluta males in open field tomatoes in two sites (Saheline and Chott-Mariem) in the Centre-East of Tunisia in 2012 and 2013. Three experiments were setup using colored traps (white, yellow, orange, red and green) in a randomized block design with four replicates under low and high population levels. The first trial lasted from November 2012 to February 2013, the second, between December 2012 and April 2013 and the third during April-May 2013. Results indicate, in all experiments, that there is no significant difference in male capture according to trap color. However, in the third trial, green colored traps captured respectively, more than 5-fold, more than 4-fold, 4-fold and more than 2-fold for red, orange, yellow and white colored traps. In aging experiments, three sets of 24 pheromone capsules were setup in pan traps wi...
ABSTRACT The fauna of Tunisian Cerceris Latreille, 1802 is summarised. It is presented by a total... more ABSTRACT The fauna of Tunisian Cerceris Latreille, 1802 is summarised. It is presented by a total of 42 species and subspecies and an unidentified taxon. Among them, Cerceris clytia de Beaumont, 1959, C. dispar Dahlbom, 1845, C. flavilabris (Fabricius, 1793), C. priesneri Mochi, 1938 and C. quadricincta segregata de Beaumont, 1970 are reported for the first time in Tunisia. The knowledge of the genus is well-developed by new provincial records for all newly identified species excluding C. chromatica Schletterer, 1887 and C. nitrariae Morice, 1911.
To evaluate the response of the olive tree cultivars Meski and Chetoui to nutrient stress, a comp... more To evaluate the response of the olive tree cultivars Meski and Chetoui to nutrient stress, a complete privation of major nutrients such as nitrogen (N), phosphorus (P), magnesium (Mg), and potassium (K) was chosen. Mineral composition, vegetative development, starch accumulation and their evolutions and distributions in the different compartment of the tree were studied. The survey of mineral diagnosis showed significant modification of the tree mineral alimentation, as well as cationic and anionic at varying degrees. Synergistic and antagonistic actions of the mineral elements were registered, reinforced by the imposed nutrient stress. The distribution of dry matter in the various organs of the olive tree cultivars was affected. The removal of nitrogen seemed to favor the allocation of carbon from leaves to roots. The effect of phosphorus deprivation was marked particularly on the development of the root system which seemed to be small, sparse and poorly developed. Important starch...
La methode thermique pour la determination de la densite de flux de seve et celle pour mesurer le... more La methode thermique pour la determination de la densite de flux de seve et celle pour mesurer les potentiels hydriques foliaire et xylemique ont ete utilisees chez l'olivier de table sous differents regimes hydriques. Les mesures ont ete effectuees du 24-10-2004 au 30-11-2004 au cours de deux phases, l'une a irrigation optimale et l'autre au cours du dessechement du sol. L'essai a ete installe dans un verger d'olivier de table et principalement sur les deux varietes les plus diffusees en Tunisie, la Meski et la Picholine. Cette etude a montre qu'au cours de la phase irriguee, la Meski a presente une densite de flux de seve et une conductance hydraulique plus elevees de 30%. Alors que l'arret de l'irrigation pendant la deuxieme phase a affecte le flux de seve et la conductance, mais differemment selon les varietes, la reduction est de 43% chez la Picholine et de 78% chez la Meski.
The tomato leafminer miner, Tuta absoluta (Meyrick) (Lepidoptera, Gelechiidae) is an important in... more The tomato leafminer miner, Tuta absoluta (Meyrick) (Lepidoptera, Gelechiidae) is an important insect pest of greenhouse tomatoes, Lycopersicon esculentum in Tunisia. The damages are severe and caused huge economic losses. Because no threshold levels are available for T. absoluta, many growers are applying chemicals at a calendar-based interval in which up to 20 sprays are provided. In order to diminish pesticide applications and to preclude damages to leaves and fruits, the implementation of a threshold level for optimum timing of chemical applications is required. A study was conducted in Saheline region of Tunisia to compare 8 alternative strategies for the control of the tomato leafminer, Tuta absoluta under greenhouse during two tomato cropping seasons in 2010 and 2011. The intervention protocols (strategies) included (1) ST1 = density of 1-4 galleries or larvae per plant , (2) ST2 = density of 5-8 galleries or larvae per plant, (3) ST3 = 9-16 galleries or larvae per plant (4) ...
Four organically-farming allowed insecticides, Neem extract (Oleorgan at 30%), Rotenone extract (... more Four organically-farming allowed insecticides, Neem extract (Oleorgan at 30%), Rotenone extract (Rotorgan at 5%) and two products of Potassium salt of fatty acid (Kabon at 50% and Biosoap at 49%), were field tested for the control of mealy aphids Hyalopterus pruni complex (Homoptera: Aphidoidea) in almond orchard in 2008 and 2009 in Tunisia. The experiment was arranged in a randomized block design consisting of 5 replications each consisted of 2 trees. The substances were applied three times in 2008 (on 8 April, on 14 April and on 6 May) and twice in 2009 (on 27 March and 10 April). In 2008, a significant decrease in densities of aphids per leaf (small larva, medium larvae and apterous adults), 6 days after the first treatment compared with control. These densities remain low during 5 weeks thereafter. The effectiveness of these products was confirmed in 2009 trial in comparison with control, however, the highest aphid population suppression was found with the application of Neem fo...
Olive (Olea europaea L.) production is marked by annual oscillations as trees alternate from high... more Olive (Olea europaea L.) production is marked by annual oscillations as trees alternate from high to low crop loads in successive years. Gas exchanges and carbohydrate content of leaves and fruits in olive tree (O. europaea cv. Besbassi) were monitored at pit hardening and fruit ripening. After fruit set, three crop loads were applied (100%, 50% and 25% of the initial fruit load) by manual thinning. Severe fruit thinning reduced photosynthesis, stomatal conductance and intercellular CO2 concentration. Crop load had no significant effect on chlorophyll fluorescence parameters. The reduction of 75% of the initial crop load favoured the accumulation of starch in leaves and soluble sugars in leaves and fruits. The reduction in initial fruit load had a significant positive effect on the current year’s shoot elongation and on inflorescence number the following spring. To increase the fruit size, a strong thinning (75%) was necessary, which coincided with the highest shoot vigour. Moderate...
The almond bark beetle, Scolytus amygdali Geurin-Meneville, is responsible for significant loss o... more The almond bark beetle, Scolytus amygdali Geurin-Meneville, is responsible for significant loss of fruit production in almond orchards throughout the world. Here, we studied the damage and the incidences of S. amygdali attack on two different scales: (1) at the level of a single tree; and (2) in an entire orchard. Our results revealed no differences in attack level among four orientations (east, west, south and north sides) for the whole tree. However, the bark that was facing west side in the direction of the prevailing wind was found to be the most suitable for females to initiate attack in Stratum S2. Attack distribution remains the same among different strata (strata is vertical divisions of the tree from the ground to the uppermost twigs with ~40 cm intervals). More than 50% of attack was observed in the trunk of the tree and upper strata. However, multiplication rate (number of emerged adults/maternal gallery) varies significantly between strata. In addition, we studied attack...
In the present study, methanol, acetone and petroleum ether extracts of olive leaves were investi... more In the present study, methanol, acetone and petroleum ether extracts of olive leaves were investigated for their insecticidal activity against Myzus persicae and deterrent effect on Phthorimaea operculella under laboratory conditions. Different concentrations 0.1%, 1% and 10% were implemented in the experiment. The results revealed that acetone and methanol extracts caused 100% mortality of M. persicae at 10%. Tests on P. operculella generated a very pronounced deterrence of oviposition and larval penetration at 10%. Data indicate that, the acetone extract proved to be most deterrent against larval penetration at 10 % in comparison with other tested extracts and concentrations with 71.7% of deterrent index. Moreover, the highest deterrent effect of oviposition was recorded to acetone extract with 25.9%, 65.2% and 93.3% at 0.1, 1 and 10%, respectively. Therefore, this study provides first report on the insecticidal and deterrent activities of olive leaf extracts against M. persicae a...
Field experiments were conducted in 2005 on orange, Citrus sinensis (L.) Osbeck, var. Thomson in ... more Field experiments were conducted in 2005 on orange, Citrus sinensis (L.) Osbeck, var. Thomson in two different sites, Sbikha and Sidi Bouali, in Tunisia to assess the effectiveness of kaolin, spinosad and malathion against the Mediterranean fruit fly (medfly), Ceratitis capitata (Wiedemann) (Diptera Tephritidae). In both study sites, the materials were applied 3 times (kaolin at a concentration of 5 kg formulated product /100 l, spinosad at a concentration of 1 l formulated product /ha and malathion at a concentration of 200 ml formulated product /100 l). The efficacy of the different treatments was evaluated by assessing male captures in modified Steiner traps and fruit damage (punctured and dropped fruits). The results indicated that (1) no significant differences among treatments in male captures were detected (2) fruit damage (no. punctured fruits and fallen fruits) was lower on kaolin-treated trees than on spinosad, malathion, and untreated trees. Kaolin successfully protected ...
This work aims to develop alternatives to chemical sprays for the control of the tomato leafminer... more This work aims to develop alternatives to chemical sprays for the control of the tomato leafminer, Tuta absoluta (Lepidoptera, Gelechiidae). Thus, were evaluated in 2014 in two greenhouses planted with tomatoes during the period of intense insect activity through March to May, two techniques: Male mass trapping and cultural control. In plots conducted under mass trapping a high density of pheromone Jackson trap (120 per ha) was used and in plots conducted under cultural control, manual removal of T. absoluta damaged tomato leaf and fruits was carried out regularly usually at weekly interval. Results indicated that on the whole, both techniques showed low effectiveness in the reduction of insect infestation compared with control. The densities of T. absoluta biological stages (eggs, young larvae and old larvae) and empty galleries per tomato leaflet did not vary between plots dedicated to mass trapping and cultural control compared with control at 5 sampling dates respectively 7, 17,...
Natural enemies have been the key factor for the regulation of the citrus leafminer populations, ... more Natural enemies have been the key factor for the regulation of the citrus leafminer populations, Phyllocnistis citrella, since its introduction in Spain in 1993. The use of various broad-spectrum insecticides in citrus has been banned in recent years. This has led to an increase in the abundance and importance of the complex of generalist predators that inhabit the citrus canopy. In this work, we hypothesize that the incidence of P. citrella and the impact of its natural enemies would have changed due to the greater presence of generalist predators. Following the same protocols used in previous studies, three orchards located in Valencia, the major citrus-growing area of Spain, were monitored during 2017–2018. The incidence of P. citrella has decreased from 1.8 to 2.4 mines per leaf in 2006 to 0.93–1.98 in 2017–2018. This decrease could be attributed to the 43.0% increase of mortality by natural enemies compared to 2006. Currently, predation is the most important mortality factor. P...
Chaetoptelius vestitus (Mulsant & Rey, 1861) is a serious pest of pistachio trees in the world. T... more Chaetoptelius vestitus (Mulsant & Rey, 1861) is a serious pest of pistachio trees in the world. This insect attacks live trees that suffer from poor growing conditions (e.g. non-irrigated and unmanaged trees surrounded by fallen dry branches, prolonged drought, etc.). In addition to Iran (Ziaaddini et al., 2002), the pistachio bark beetle is present in Syria (Lababidi, 1998), Algeria (Chebouti-Meziou et al., 2011), Iraq (Abu Yaman, 2009), Italy (Fabbri and Valenti, 1998), Turkey (Turanli and Sütçü, (2009), Greece (Fragoulis, 2004) and in other pistachio producing countries in the Middle East. Biology and damage of C. vestitus were studied by Chebouti-Meziou et al., (2009) and also its bioecology (Rizk et al., 1981a, b, c). In Tunisia, C. vestitus is considered to be a major pest of pistachio trees (Braham and Jardak, 2012). It affects both buds and bark parts of the pistachio tree (Chebouti-Meziou et al., 2006). C. vestitus is univoltine, having one generation that emerges in winter...
In this study, a one-year field experiment was conducted to evaluate the effect of winter tree pr... more In this study, a one-year field experiment was conducted to evaluate the effect of winter tree pruning severity on the abundance, population dynamics and shoot infestation as well as vegetative growth of two citrus cultivars Clementine, C. clementina Hort. Ex Tan. and orange, Citrus sinensis cv Thomson by the Spirea aphid, Aphis spiraecola Patch (Hemiptera, Aphididae) and its natural enemies. Data were collected during the spring in 2015 on 6-years old Citrus trees submitted to 3 different intensities pruning (severe, medium or control and light pruning) following a completely randomized design with five replications in which one single tree-plot was considered as a replicate. Results showed that, for both Citrus cultivars, pruning enhanced the sprouting of newly shoots, the shoot elongation and the number of leaves per shoot especially for Clementine cultivar. The average number of newly growing shoots per tree was maximum in heavy pruned trees (5593±315 shoots per tree) and minimu...
Field studies were conducted to evaluate the influence of colored pan water traps and aging of ph... more Field studies were conducted to evaluate the influence of colored pan water traps and aging of pheromone dispenser on the capture of the tomato leafminer, Tuta absoluta males in open field tomatoes in two sites (Saheline and Chott-Mariem) in the Centre-East of Tunisia in 2012 and 2013. Three experiments were setup using colored traps (white, yellow, orange, red and green) in a randomized block design with four replicates under low and high population levels. The first trial lasted from November 2012 to February 2013, the second, between December 2012 and April 2013 and the third during April-May 2013. Results indicate, in all experiments, that there is no significant difference in male capture according to trap color. However, in the third trial, green colored traps captured respectively, more than 5-fold, more than 4-fold, 4-fold and more than 2-fold for red, orange, yellow and white colored traps. In aging experiments, three sets of 24 pheromone capsules were setup in pan traps wi...
ABSTRACT The fauna of Tunisian Cerceris Latreille, 1802 is summarised. It is presented by a total... more ABSTRACT The fauna of Tunisian Cerceris Latreille, 1802 is summarised. It is presented by a total of 42 species and subspecies and an unidentified taxon. Among them, Cerceris clytia de Beaumont, 1959, C. dispar Dahlbom, 1845, C. flavilabris (Fabricius, 1793), C. priesneri Mochi, 1938 and C. quadricincta segregata de Beaumont, 1970 are reported for the first time in Tunisia. The knowledge of the genus is well-developed by new provincial records for all newly identified species excluding C. chromatica Schletterer, 1887 and C. nitrariae Morice, 1911.
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Papers by Mohamed Braham