Browsing by Author "Lakhdari, Wassima"

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    Acaricidal Activity of Aqueous Extracts against the mite of date palm Oligonychus afrasiaticus Meg (Acari: Tetranychidae)
    (Journal of Medicinal Plants Studies 2015; 3(6): 113-117, 2015) Lakhdari, Wassima; Dehliz, A; Acheuk, F; Soud, A; Hammi, H; Mlik, R; DOUMANDJI-MITICHE, Bahia
    The use of chemical products to fight against insects raises several concerns related to the environment, human health, non-target species and development of resistant pest populations. The use of bio-pesticides may reduce the risks of pests and safeguard biodiversity. This experiment was conducted with the objective to study the effect of aqueous plant extracts from the southeast region of Algeria (Zygophyllum album L, Cotula cinerea Del and Limoniatrum guyonianum Del) on the mortality of the date palm mite (Oligonychus afrasiaticus). The trial was conducted at the Laboratory of Plant Protection of INRAA. The five doses (1%, 2%, 3%, 4%, and 5%) were tested on adults of phytophagous. The results show that the extracts of plants and C. cinerae and L. guyonianum do not show an effect on the pest. Unlike, Z. album showed a very significant effect on the mite by a mortality rate of 76%.
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    Host Plant Determination of Brachytrupes megacephalus Lefebvre, 1827 (Orthoptera, Grillinae) Using Faeces Analysis in the Region of Oued Righ (Algerian Sahara)
    (American-Eurasian J. Agric. & Environ. Sci., 15 (2): 271-277, 2015, 2015) Lakhdari, Wassima; DOUMANDJI-MITICHE, Bahia; Dahliz, A; DOUMANDJI, Salaheddine; Bendifellah, L; Bouchikh, Y; Hammi, H; Soud, A; Mlik
    In the southeast of the algerian Sahara (Touggourt), the host plant determination of Brachytrupes megacephalus was studied by faeces analysis (microscopic observations). The experimentation was conducted in mid August until the end of September 2014. The main results of faeces analysis showed that the plants consumed by B. megacephalus belong to 8 families: Arecaceae (Phoenix dactylifera), Apocynaceae (Nerium oleander), Asteraceae (Chrysanthemum), Myoporaceae (Myoporum sandwicense), Plumbaginaceae (Armeria maritima), Rosaceae (Prunus armeniaca), Solanaceae (Solanum lycopersicum) and Triochylaceae (Cherry fantasia and White Kristina). Phoenix dactylifera is the most preferred host species by the adults of Brachytrupes megacephalus, with a consumption rate 85,87%.
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    Morphological Study of Different Developmental Stages of Brachytrupes megacephalus Lefebvre, 1827 (Orthoptera, Gryllidae) and Their Development in Oued Righ Region (Algerian Sahara)
    (journal international, 2015) Lakhdari, Wassima; DOUMANDJI-MITICHE, Bahia; Acheuk, Fatma; Dehliz, Abderrahmene; M’lik, Randa; Soud, Adila; Hammi, Hamida
    In the Southeast of the Algerian Sahara (Touggourt), a morphological study of Brachytrupes megacephalus was conducted during 2014. According to the damages caused by this cricket through deviation and loss of irrigation water due to deep tunnels dug and damage crops, we found it useful to identify the insect and study the external appearance of this cricket. The results show that B. megacephalus has an annual life cycle with five nymph stages. The mating season is placed normally from mid-March to mid-April. The eggs are with an ovoid shape and a greenish color measured by 3.5 to 4 mm, First nymph stage is with a transparent colors which has a pronotum measured between 1.5 and 2.2 mm with a head between 3 and 4,6 mm and the femur has a length of 5 to 6 mm. Unlike the other nymph stages are yellow-orange with a darker head than the rest of the body. The adults of this cricket have a pronotum of 5 to 6 mm, the head is between 13 to 14 mm and the femur is from 17 to 22 mm. All these post-embryonic development mature throughout the summer until September, during which the cricket becomes imago.
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    Morphology and structure of adult male genitalia of Brachytrupes megacephalus Lefebvre, 1827 (Orthoptera, Gryllidae) in the southeast of Algeria
    (Journal of Entomology and Zoology Studies 2015; 3(6): 355-359, 2015) Lakhdari, Wassima; DOUMANDJI-MITICHE, Bahia; Acheuk, Fatma; Dehliz, Abderrahmene; Hammi, Hamida; M’lik, Randa; Soud, Adila; DOUMANDJI, Salaheddine
    Depending to the few and old data which have been conducted on the body morphology of Brachytrupes megacephalus Lefebvre, 1827 (Orthoptera, Gryllidae), we have investigated the structure of male genitalia in Algerian Sahara species to establish a basis for morphological study. The study was conducted in the laboratory of entomology in the experimental station of Sidi Mehdi. After isolation of the male genital apparatus, we find that its structure is consisted by the testis, accessory gland, ejaculatory duct and the phallic complex. The last organ is composed of epiphalus, guiding rod, ectoparamere, endoparamere, dorsal and median pouch. The spermatophore produced by Brachytrupes megacephalus was investigated in detail. Besides the study of the spermatophore size (8 mm), morphology, and formation, spermatophore is composed of the ampulla (3.9 mm), attachment plate (2.8 mm) and the tube (1.5 mm). The present paper aims to improve this information, on the species of B. megacephalus.