المنشورات و المؤلفات
This study describes for the first time the necrophagous Diptera attracted to rabbit carcasses in three distinct
habitats in Riyadh, Kingdom of Saudi Arabia (KSA). A mean number of 1,427 flies belonging to 8 families and
16 species were collected...
Because they may demonstrate characteristics of the environment where a body has been laying prior to the
discovery, flies are insects of forensic interest. We investigated the fly abundance and the effect of location in
Kingdom of Saudi Arabia on...
Objective: This study was designed to characterize the DNA polymorphisms of the melanocortin-1 receptor (MC1R) gene in indigenous Saudi Arabian sheep breeds exhibiting different color coats, along with individuals of the Sawaknee breed, an exotic...
Effects of methanol extracts of Xanthium strumarium on different cancer cell lines and on the mortality rates of Aedes caspius, Culex pipiens (Diptera: Culicidae) were investigated. Among the cell lines tested, the Jurkat cell line was the most...
Necrophagous species of insects provide useful complementary data to estimate the postmortem interval in forensic cases. Here, for the first time, we report on insect specimens collected from human corpses in Riyadh, Kingdom of Saudi Arabia. During...
Megaselia scalaris Loew (Diptera: Phoridae) and Parasarcophaga ruficornis Fabricius (Diptera: Sarcophagidae) are flies of forensic importance. Impact of M. scalaris on the life cycle of P. ruficornis has been studied under laboratory condition. The...
Many of the blow flies (Calliphoridae) are of economic importance because of their effects on public health and the economy by causing myiasis in human beings and animals. Blow flies are also, however, forensic bioindicators since they can be used...
A main objective of the study is the establishment of a forensic entomological database for Riyadh, Saudi Arabia. Decomposition processes and beetle succession were analysed on rabbit carcasses in three different habitats (agricultural, desert and...
The performance of 10 clones of the grain aphid Sitobion avenae Fabricius was measured over three generations on three host plants (wheat, bluegrass and ryegrass). The tested clones belonged to six microsatellite genotypes; two genotypes were...
The present work describe a safe, mild, eco-friendly and versatile method for the synthesis of N1,N1,N4,N4-tetramethylpiperazine-1,4-dicarboxamide. The prepared compound was screened against Aedes caspius (Pallas) and Culex pipiens (Linnaeus) larvae...
The influence of burning on the decomposition of rabbit carcasses and on insect succession was investigated in
three different habitats (agricultural, desert, and urban) in order to provide data for estimating the postmortem
interval (PMI). Each...
Invasive species are capable of causing considerable damage to natural ecosystems, agriculture and economies throughout the World. Samsum ant, Brachyponera (Pachycondyla) sennaarensis has been a reason for medical implication and social nuisance...
Several vectoring insects, such as aphids and white fly, harbour secondary bacterial endosymbionts. When an insect vectors a persistently transmitted plant virus, this virus should pass through the insect gut into the haemolymph. The secondary...
Aphids have developed symbiotic associations with different bacterial species, and some morphological and molecular analyses have provided evidence of the host relationship between the primary symbiotic bacteria (Buchnera aphidicola) and the aphid...
Endophytic microorganisms are fungi or bacteria which live inside plant tissues or organs, without causing them any harmful symptoms. Indeed, since many are also able to produce substances of biotechnological interest, they may protect the plant...
The effects of Cadmium (Cd) exposure and the treatment with Zinc (Zn) on immune functions of splenocytes and cultured lymphocytes of rats were studied. The exposure of rats to Cd was at a dose of 2.2 mg/kg CdCl2, injected subcutaneously four times...
The ant Pachycondyla sennaarensis (Mayr) (Hymenoptera: Formicidae: Ponerinae) is a small dark ant, a recent accidental introduction into Saudi Arabia. It tends to be found in or near human habitations, and it is particularly unpleasant because its...
The major volatile compounds in the poison glands of two Monomorium ant species from Saudi Arabia have been identified. Monomorium niloticum and Monomorium najrane both contain mixtures of alkyl- and alkenyl-pyrrolidines and -pyrrolines in their...
In two Messor species, M. meridionalis and M. foreli, glandular source, optimum concentration, longevity and interspecific responses of the trail pheromone were studied in the laboratory. Dufour’s gland is the sole origin of the trail pheromone, and...
In crickets, neurogenesis persists throughout adulthood for certain local brain interneurons, the Kenyon cells in the mushroom bodies, which represent a prominent compartment for sensory integration, learning, and memory. Several classes of these...
Many ants use pheromone trails to organize collective foraging. Trail pheromones are produced from different glandular sources and they may be specific to a single species or shared by a number of species. I investigated the source of trail...
Ant species use branching networks of pheromone trails for orientation between nest and resources. The current study demonstrated that workers of the venomous samsum ant, Pachycondyla sennaarensis (Mayr) (Hymenoptera: Formicidae: Ponerinae), employ...
The effect of temperature and relative humidity (r.h.) on the biology of the carpet beetle Attagenus fasciatus was studied under laboratory conditions. The influence of two temperatures (30 C and 35 C) and three humidities (40, 60 and 80% r.h.) on...
Ants form complex colonies, harboring resources that can potentially be exploited by myrmecophiles (organisms living in association with ants). Myrmecophily has been studied in detail for Coleoptera, but for mites, remain largely unstudied. This...
In Ar-Riyadh Region in the Kingdom of Saudi Arabia (KSA), the Governorates of Al-Zulfi, Al-Ghat and Al-Majmah (north zone), of Al-Hariq, Al-Aflaj and Hawtat Bani Tamim (south zone), of Hijrat Sa`ad (east zone), of Shaqra, Durma, Al-Qasab, Huraimela`...
Workers of Monomorium lepineyi and Monomorium bicolor secrete trail pheromones from their venom glands. The Dufour’s gland and the hind gut secretions have no effect on the trail pheromone activity in M. lepineyi, while in M. bicolor the secretions...
The hind gut of the worker of the two Paratrechina species is the source of the trail pheromone. In P. vividula, the poison gland secretion has an inhibitory effect but in P. longicornis it hasn’t. In P. lon gicornis and P. vividula, the optimum...
Black ant (Samsum), Pachycodyla sennarrensis, stings and injects venom and inflicts allergy (a rare clinical problem) due to its local and systemic reaction, which is considered as a health hazard amongst Saudi society. Thus, black ant is a source...
Overlap of insect growth regulator (cyromazine) concentration, treatment method and rearing
temperature was studied on the southern cowpea weevil, Callosobruchus maculatus F. (Bruchidae: Coleoptera), under laboratory conditions...
Changes in physical, chemical, microbial and enzymatic parameters were monitored during the composting of organic fraction of municipal solid wastes under compost plant normal operating conditions (CPNOC) (pile size, moisture and turning were not...
In this study we investigated the effects of different cryomazine concentrations and host type on the biology of the southern cowpea weevil Callosobruchus maculatus F. (Coleoptera: Bruchidae). Our results showed that increasing cryomazine...
Methanol extracts of different plants namely, Trichodesma africanum (Boraginaceae), Cleome rupicola(Capparceae) and Ochradenus baccatus(Resedaceae), were tested for larvicidal activity against 4th instar larvae of Aedes caspius...
Three new model systems for the study of rhythm generation in the isolated insect central nervous system are presented. Natural behavioral rhythms are produced in these cases spontaneously in the isolated CNS. They can be monitored as output of...
To grow and reproduce well, animals facing fluctuations in abiotic conditions must adjust their physiology, activity rhythms, and foraging behavior accordingly. The foraging activity and food preferences of the samsum ant Pachycondyla sennaarensis (...
The use of synthetic organic pesticides has serious economic, social and environmental ramifications. Thus, this study describes the experiments using botanical and bacterial extracts to control the samsum ant (Pachycondyla sennaarensis). This ant...
The use of entomopathogenic fungi is a promising alternative to chemical control against mosquitoes. In February 2013, two fungi were isolated from the Samsum ant, Pachycondyla sennaarensis (Mayr) (Hymenoptera: Formicidae) collected in Riyadh, KSA....
يتناول هذا الكتاب التقنية الحيوية للحشرات، والتي تعني استخدام الحشرات والخلايا أو الجزيئات المشتقة منها في التطبيقات الطبية، أو الزراعية، أو الصناعية أو أية تطبيقات تقنية أخرى، مثل البيولوجيا الإلكترونية التي تركز في التحويل المنتظم للحلول من...
Insects are considered pests if they threaten a resource that is valued by humans, such as human health. The protection of a resource from a pest is usually achieved by poisoning the pest with a toxic pesticide, but protection can also be achieved...