Collection of Ground Beetles (Coleoptera: Carabidae) in Two Types of Arboreal Terrain in the Natural Park of Belezma Batna (North-Eastern Algeria)

The inventory of the carabid family at two forest sites in the Belezma national park namely an oak grove site and a cedar site during a period ranging from May 2017 to April 2018, has shown the counting of 27 taxa that have been inventoried by Barber pitfall traps. The results showed that the Quercus ilex site has slightly more species (25 species) compared to the Cedrus atlantica one (23 species). However, the Harpalinae subfamily is quantitatively the better one represented at both sites. The Shannon and Simpson indices report slightly higher figures in the Cedrus atlantica site with respectively (2.38) and (0.87), which explains the higher Jaccard index of similarity (78 %). The boxplot analysis of the two sites shows better representation in the Cedrus atlantica site although there are more outliers in the Quercus ilex site

Structure and Parasitism of Egg-Batches of the Pine Processionary Moth, Thaumetopoea Pityocampa in the Algerian Cedar Forests.

Today, climate change is one of the greatest threats facing forest ecosystems. It directly influences the geographical distribution of insects and increases epidemics of harmful insects. The present work took place in this context. It aimed to contribute to the knowledge of egg parasitoids that could affect the evolution of the pine processionary caterpillar Thaumetopoea pityocampa, a major forest pest in Algeria and Mediterranean countries. The study was carried out on 120 batches of eggs taken from the Atlas cedar at two sites in the Chelia cedar zone (case of eastern Algeria) in 2017. It allowed the analysis of a total of 37,943 eggs. At the first site, the hatch rate was 66%; the egg mortality rate increased at a rate of 15 %, and the parasitism rate was rather high at 18%. The second site was characterized by the parasitism rate lower by about 11%, while the egg mortality rate was relatively comparable in the order of 14% with a hatching rate of 75%. The eggs are more parasitized by Baryscapus servadeii (79%) than by Trichogramma embryophagum (17%), while Ooencyrtus pityocampae remains negligible (4%). Egg parasitoids are an important killer of Thaumetopoea pityocampa eggs

Biodiversity of the Blattopteran Fauna in the Chelia Cedar Forest (the Aures - Eastern Algeria)

The cedar forests in Algeria represent a model of forests very rich in entomological fauna and especially dictyopterans, notably blattopterans. In the cedar forest of Chelia in the Aurès Mountains, we chose three different sites according to altitude (2020 m, 1920 m, 1820 m) in order to collect existing cockroaches using the sight-hunting method (twice a month). The inventory allowed us to capture more than 1220 cockroaches and we were able to identify three genus (Dziriblatta, Phyllodromica ,Loboptera) and seven species: Dziriblatta stenoptera, Dziriblatta nigrivintris, Phyllodromica zebra, Pyllodromica trivittata, Phyllodromica sp, Loboptera angulata, Loboptera alluaudi, of which Dziriblatta nigrivintris is the most abundant species with a rate of 52.05 % .The results show that the distribution of these species in the diffrent sites in Chelia cedar is controlled by a several natural factors such as (temperature, altitude …etc)

Insecticidal activity of three plants extracts against Myzus persicae (Sulzer, 1776) and their phytochemical screening

<p><span style="font-family: 'Times New Roman','serif'; font-size: 9pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: SL; mso-bidi-language: AR-SA;" lang="EN-GB">To reduce the use of synthetic pesticides and their negative effects on the environment, leaves extracts of <em>Artemisia herba-alba </em> Asso, <em>Eucalyptus camaldulensis </em>Dehnh and <em> Rosmarinus officinalis </em>L. were obtained with petroleum ether, ethanol and distilled water as solvents. These extracts were evaluated under laboratory conditions for their insecticidal effect against 3 to 4 days-old <em>Myzus persicae </em>individuals (Homoptera: Aphididae) at 1, 2.5, 5, and 10 %. We made observations after 24 hours. Etheric extract of all plants was effective and caused mortalities (100 %, 53 % and 60 % respectively) at the highest concentration. However, ethanolic and aqueous extracts did not show any significant insecticidal effect. The phytochemical screening showed the richness of etheric extract in terpenes. The results obtained suggest that we can make bioinsecticides based on leaves etheric extracts from these plants for use in integrated pest management.</span></p

Inventory and Distribution of Mosquitoes (Diptera, Culicidae) in the Aures Region (Batna, Algeria)

Mosquitoes are the most terrifying both for their abundance and for the diseases they transmit. They are vectors of malaria, lymphatic filariasis and arbovirus such as yellow fever, dengue, viral encephalitis and African horse sickness. These characteristics give this fauna prominent importance and health interest. To identify the most widespread mosquito species, we conducted for the first time an inventory in the Aures region more particularly the wilaya of Batna (East of Algeria) from May 2017 to January 2020, we studied their diversity, abundance and distribution. The sampling is done by monthly surveys of the various localities chosen, using the dipping method to collect the larvae. In the various sites prospected, we were able to collect a total of 8275 mosquito individuals presented by nine species belonging to four different genera: Culiseta, Culex, Aedes and Anopheles of which the genus Culiseta is the best represented, particularly with the species Culiseta longiareolata (52.07%). It appears from what we have obtained that the Batna region reveals a significant diversity of mosquitoes. This study aimed to inventory the Culicidian species more broadly by surveys in several localities of Batna region at the level of different environments. This will allow us to know the faunistic composition of the region, to collect and record information on the vectors, their habitats and the conditions that favors their multiplication within a given area