Hassan A. Gad

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• Ph.D. in Entomology
• Professor (Assistant) at Al-Azhar University

The present study was conducted to evaluate the efficacy of entomopathogenic nematode, Steinernema carpocapsae Weiser and three entomopathogenic fungi (Metarhizium anisopliae (Metschn.) Sorokin, Trichoderma harzianum Rifai, and T. viride Pers.) against Spodoptera frugiperda (J.E. Smith) second and fourth larval instars. The results showed that S. c...

Housefly causes a variety of health problems in humans and animals. So, the control of housefly larvae and adults are one of the best ways to avoid health problems arising from diseases transmitted by this vector. The current investigation aimed to assess the efficacy of oxymatrine on Musca domestica (Diptera: Muscidae) larvae and adults. Commercia...

The toxicity of two microbial insecticides, abamectin (AB) and emamectin benzoate (EM) at 0.25 and 0.5 mg/kg, and three monoterpenes, carvone (CA), p-cymene (CY), and menthone (ME) at 0.625, 1.25, and 2.5 g/kg and their combined treatments was assessed against Callosobruchus maculatus (F.) on cowpea seeds. Adult mortality (after 3 and 7 days), prog...

The rice moth, Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) is a harmful insect pest for grains in storage systems. However, there is a lack of available data on the effect of ozone on rice moth. In this study, we assessed the ozone at concentrations of 1.0, 3.0, and 5.0 g/m 3 for six-time intervals (0.5, 1.0, 2.0, 3.0, 4.0 and 5.0 h) on...

The insecticidal potential of ozone gas was tested against two insect pests of stored silkworm products, Attagenus fasciatus (Thunberg, 1795) (Coleoptera: Dermestidae) and Gibbium psylloides (Czempinski, 1778) (Coleoptera: Ptinidae). Ozone was tested at three concentrations, 500, 1000 and 1500 ppmv for three exposure times, 1, 2 and 3 h. The adult...

Background Housefly causes a variety of health problems to humans and animals. Therefore, it is crucial to find out effective methods for the control of housefly larvae to avoid health problems associated with the presence this disease vector insect. Efficacy of insect growth regulators (IGRs), chlorfluazuron, lufenuron, methoxyfenozide and pyripro...

In the current study, the effect of ozone gas on the mortality of Acanthoscelides obtectus adults on stored common bean seeds was assessed. Ozone was evaluated at concentrations of 500, 1000 and 1500 ppmv and three exposure times. Changes in the cuticle of adults were examined under scanning electron microscope, and the chemical composition of comm...

The current study evaluated the effect of microbial-derived insecticides (abamectin and spinosad), two microbials ( Beauveria bassiana (Balsamo) Vuillemin, Bacillus thuringiensis Berliner), and three chitin synthesis inhibitors (CSIs) (chlorfluazuron, hexaflumuron and lufenuron) against Spodoptera frugiperda larvae. Spinosad and abamectin caused pr...

The present study investigated the relative abundance of mosquitoes larvae in three different breeding habitats in seven districts of Beni-Suef Governorate, Egypt during two years (2019–2020). The results showed that the species composition of mosquitoes was represented by four genera and eight species; four of Culex (Cx. pipiens Linnaeus,1758, C...

The insecticidal activity of ten monoterpenes against larvae of Musca domestica (Diptera: Muscidae) was evaluated. Monoterpenes were mixed with food-media at concentrations of 2.5, 5.0, 10.0, 25.0, 50.0, 75.0 and 100.0 mg/kg. Three monoterpenes, p-cymene, 1,8-cineole and cuminaldehyde displayed a durable larvicidal activity with LC50 values of 0.14...

Four species of Trichoderma genius (T. harzianum, T. citrinoviride, T. viride and T. asperellum) and Metarhizium aniso�pliae were assessed for their effects on larval mortality and progeny production of Trogoderma granarium Everts (Cole�optera: Dermestidae). The fungal strains were tested at 2.0×106 , 2.0×107 , 2.0×108 and 2.0×109 spores/kg. The la...

Essential oils (EOs) have been recognized as eco-friendly promising insecticides for many important economic pests; thus, nano-formulations (NEs) of EOs have been formulated, developed, and evaluated to manage stored pests. The insecticidal activity of Origanum majorana L. essential oil (EO) and their nanoemulsion (NE) were evaluated against Callos...

The greater wax moth, Galleria mellonella was reported to be one of the most destructive insect pests of honeybee wax and wood hives. Addition to hindering and reduction of honey bee activities particularly in the weak colonies. In comparison to untreated larvae, fourth instar larvae of G. mellonella were treated with ozone as a gas at various conc...

The residual efficacy of three chitin synthesis inhibitors (CSIs) (chlorfluazuron, hexaflumuron and lufenuron) and oxymatrine at an application rate of 5.0 mg/kg was evaluated against Callosobruchus maculatus and Cal-losobruchus chinensis monthly for 5 consecutive months (6 bioassays). In each bioassay, the mortality of two insect adults was counte...

Control of Trogoderma granarium is difficult due to its high tolerance to all common insecticides. This problem can be partially overcome using binary combinations of insecticides with other control measures and products. In this study, three chitin synthesis inhibitors (CSIs), chlorfluazuron (CH), hexaflumuron (HE) and lufenuron (LU), and three in...

The insecticidal efficacy of four species of Trichoderma genius (T. harzianum, T. citrinoviride, T. viride and T. asperellum) and Metarhizium anisopliae was assessed against Callosobruchus maculatus and C. chinensis on cowpea seeds at concentrations of 2.0 × 10 6 , 2.0 × 10 7 , 2.0 × 10 8 and 2.0 × 10 9 conidia/kg. The adult mortality was counted 3...

The residual efficacy of three chitin synthesis inhibitors ( CSIs) (chlorfluazuron, hexaflumuron and lufenuron) and oxymatrine at an application rate of 5.0 mg/kg was evaluated against Callosobruchus maculatus and Callosobruchus chinensis monthly for 5 consecutive months (6 bioassays). In each bioassay, the mortality of two insect adults was counte...

Residual toxic effect of insecticides mixed with or sprayed on stored commodities is a key element of an efficient protection of stored products. The residual efficacy of chlorprifos-methyl, deltamethrin, abamectin and spinosad at application rates of 5.0, 2.0, 2.0 and 1.0 mg/kg, respectively, was tested against Callosobruchus maculatus and C. chin...

The present study was conducted to evaluate the larvicidal and pupacidal efficacy of Spinosad on Culex species in their breeding habitats in village of Saft, Beni Suef Governorate, Egypt. The results showed that Spinosad caused a pronounced toxicity against C. pipiens. The total mortality of second and fourth larval instars was achieved by lower co...

The control of different agricultural insect pests still relies mainly on the use of synthetic insecticides. However, excessive use of these chemicals cause many problems, including high residue levels, harmful effects on the environment and human health, and development of insect resistance. Therefore, new strategies for the management of agricult...

Purpose Cowpea is an essential pulse food in several regions throughout the world. Essential oil isolated from Thuja orientalis unripe fruits exposed to gamma radiation at dose levels of 0, 1, 3 and 5 kGy was evaluated as cowpea seed protectant against Callosobruchus maculatus and Callosobruchus chinensis. Materials and methods Cowpea seeds were t...

Oxymatrine is a naturally derived bioinsecticide with an environmentally favorable toxicity profile. So the present study investigated its larvicidal and pupicidal efficacy on Culex species in laboratory, semi-field, and field conditions in Saft, Beni Suef Governorate, Egypt. The results revealed that oxymatrine showed pronounced toxicity against C...

Management of Trogoderma granarium with insecticides alone is difficult due to its high tolerance to commonly used insecticides. In the present study, three organophosphorus insecticides (OPs), chlorpyrifos-methyl (CH), pirimiphos-methyl (PI) and malathion (MA) were evaluated alone or in binary blends with diatomaceous earth (DE), kaolin (KA) and z...

The insecticidal efficacy of two insecticides, abamectin (AB) and deltamethrin (DL), alone or in combination with two inert dusts, diatomaceous earth (DE) and kaolin (KA), was assessed against larvae of Trogoderma granarium Everts (Coleoptera: Dermestidae) on wheat grains. The two insecticides (AB and DL) were evaluated at rates of 0.25, 0.5 and 1....

In this study, the effect of five host plants on the biology and food consumption of the fall armyworm Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) was evaluated in Egypt. Developmental periods and weight of different growth stages, percentages of pupation and adult emergence, survival, and nutritional indices were evaluated on maize, cas...

Efficacy of insecticides chlorpyrifos-methyl (CH), deltamethrin (DE) and spinosad (SP) was evaluated alone and in binary combinations with carbon dioxide (CA) against Sitophilus oryzae (L.). Mortality of S. oryzae adults was recorded after 3, 7 and 14 days, and progeny production and wheat weight loss were assessed after 90 days for all treatments....

The insecticidal potential of three insecticides (chlorpyrifos-methyl (CH), deltamethrin (DE), spinosad (SP)), zeolite (ZE) and their low-rate combinations was tested against Sitophilus granarius (L.) and Sitophilus oryzae (L.) adults. The application rates were: CH at 0.1, 0.5 and 1.0 mg/kg, DE at 0.2, 0.5, 1.0 and 2.0 mg/kg, SP at 0.1, 0.25, 0.5...

The insecticidal potential of diatomaceous earth (DE), two chitin synthesis inhibitors [chlorfluazuron (CH) and hexaflumuron (HE)] and their binary mixtures was tested against Callosobruchus maculatus (F.) and C. chinensis (L.) on cowpea seeds. Diatomaceous earth was assessed at rates of 100, 500 and 1000 mg/kg. The two insecticides (CH and HE) wer...

Culex pipiens was the main vector of Bancroftian filariasis that causes filariasis disease in Egypt. Effect of chlorpyrifos on field strains of C. pipiens in laboratory and their field breeding habitats were evaluated in village of Saft, Beni Suef Governorate, Egypt. Under laboratory conditions, all tested concentrations (0.5-25 ppm) of chlorpyrifo...

The insecticidal efficacy of abamectin (AB) and three inert dusts, diatomaceous earth (DE), zeolite (ZE) and kaolin (KA), was evaluated alone and in binary mixtures as stored cowpea protectants against Callosobruchus chinensis. Inert dusts (DE, ZE and KA) were tested at 100, 500 and 1000 mg/kg (ppm), and abamectin was applied at 0.1, 0.25 and 0.5 m...

Essential oils may provide green and safe alternatives to currently used fumigants and insecticides for the management of stored-product insects. This study reports the chemical analysis and fumigant toxicity of 10 essential oils against Tribolium confusum. The essential oils were obtained by hydrodistillation. The chemical profile of essential oil...

The insecticidal potential of two inert dusts, zeolite (ZE) and kaolin (KA), and carbon dioxide (CA) and their binary combinations was evaluated against Callosobruchus maculatus (F.) and C. chinensis L. (Coleoptera: Chrysomelidae: Bruchinae). The inert dusts were applied on cowpea seeds at 100, 500 and 1000 mg/kg, and CA was tested at 10 and 20% fo...

Insects of medical importance are the most harmful pests impacting the human health as they are vectors to many human diseases. The fight against these insects is mainly based on the use of synthetic insecticides. However, an inappropriate use of these chemicals, can cause harmful impact on the environment and human health, and/or the development o...

Insecticidal activities of spinosad and chitin synthesis inhibitors (CSIs) have been individually assessed against some stored product insects, but the efficacy of their combinations against stored product insects was not previously reported. Thus, bioassays were conducted to evaluate spinosad and three CSIs (chlorfluazuron, hexaflumuron and lufenu...

Combination of crop protectants is an important approach to increase insecticidal efficacy and reduce the application rates. In this study, the insecticidal efficacy of spinosad and seven monoterpenes, alone and in binary combinations, was evaluated against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) in stored wheat. Spinosad was tested at a...

New strategies have to be introduced for the management of agricultural and public health insects to overcome the problems associated with long-term use of synthetic insecticides. Plant-based natural products are among the possible and available alternatives to be applied for insect management. Among the plant secondary metabolites, monoterpenes ha...

The insecticidal efficacy of ozone was evaluated against the adults of Callosobruchus maculatus (F.) and C. chinensis L. on stored cowpea seeds under laboratory conditions. Ozone was assessed at concentrations of 0.25, 0.5, 1.0, 1.5, and 2.0 g/m³. The effect of ozone treatments on the adult mortality after 1, 3, 5 and 7 days of treatment, progeny p...

The insecticidal effect of Trichoderma harzianum (TH), diatomaceous earth (DE), kaolin (KA) and their combinations against Callosobruchus maculatus (F.) and Callosobruchus chinensis L. (Coleoptera: Chrysomelidae: Bruchinae) was evaluated. The fungus T. harzianum was applied at 1×10⁵, 1×10⁶ and 1×10⁷ spores/kg of cowpea seeds individually and mixed...

The insecticidal efficacy of diatomaceous earth (DE), spinosad (SP) and Trichoderma harzianum (TH), and their combinations was evaluated against the adults of Callosobruchus maculatus (F.) and Callosobruchus chinensis L. (Coleoptera: Chrysomelidae: Bruchinae) on cowpea seeds. The application rates used in this study were 100 and 500 mg/kg (ppm) for...

The cowpea beetle, Callosobruchus maculatus (Fabricius), is recognized as a common insect pest of cowpea worldwide. The present study aimed to evaluate the insecticidal activity of ozone gas against all life stages (egg, larva, pupa and adult) of C. maculatus at a concentration of 600 ppm (1.2 g/ m 3) after 6 exposure times of 0.5, 1, 2, 3, 4 and 5...

A laboratory assay was designed to determine the insecticidal efficacy of Trichoderma harzianum Rifai and diatomaceous earth (DE) against Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae: Bruchinae). The fungus T. harzianum was applied at 0.0, 3.3 × 106, 6.6 × 106 and 2.1 × 107 spores/kg of the common bean individually and mixed with 0, 200,...

Acanthoscelides Schilsky is the large genus of Neotropical bruchid beetles, in which most species show host plant specialization. The species of A. obtectus Say, specialized on Phaseolus beans and therefore considered pests. Six legume grain species (Dried common bean, green common bean, lentil, cowpea, broad bean, and soybean) were selected to stu...

Stored dry common bean seeds are subject to infestation by Acanthoscelides obtectus , which reduces the quality of the infested seeds and depletes their nutritional value, making them unfit for human consumption. The susceptibility of three Egyptian varieties to infestation by A. obtectus was investigated. The Nebraska variety was the most suscepti...

Entomology Journal publishes original research papers and reviews from any entomological discipline or from directly allied fields in ecology, behavioral biology, Red flour beetle, T. castaneum (Herbst) is worldwide and most destructive pest of stored products and is cosmopolitan in distribution. It is the most common pest of wheat flour. It also c...

Angoumois grain moth, Sitotroga cerealella (Olivier), is one of the most important pests of such stored products as maize and wheat. Different stages of this pest were treated with ozone as a gas at three concentrations (1, 3, and 5 g/m3) for six different periods (0.5, 1, 2, 3, 4 and 5 h.) compared with untreated insects. The results indicated tha...

J Jo ou ur rn na al l o of f R Ra ad di ia at ti io on n R Re es se ea ar rc ch h a an nd d A Ap pp pl li ie ed d S Sc ci ie en nc ce es s ABSTRACT This study deals with the effects of thermal treatment with 32, 20 and 10 o C on various biological and biochemical aspects of 100 Gy gamma-irradiated Ephestia cautella among three successive generation...

J Jo ou ur rn na al l o of f R Ra ad di ia at ti io on n R Re es se ea ar rc ch h a an nd d A Ap pp pl li ie ed d S Sc ci ie en nc ce es s ABSTRACT The present study deals with the effect of a three sub-sterilizing doses of gamma radiation 100, 150 and 200Gy on the almond moth Ephestia cautella among P 1 , F 1 and F 2 generations, and combined effe...