
Reza Talaei-HassanlouiUniversity of Tehran | UT · Department of Plant Protection
Reza Talaei-Hassanloui
PhD
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78
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Introduction
Publications
Publications (78)
Two-spotted spider mite, Tetranychus urticae Koch (Acari: Prostigmata), is one of the most economically important mite species, mainly controlled by chemical acaricides. Natural enemies have been assessed as reliable alternatives for management of this phytophagous mite. In the current project, demographic characteristics of Neoseiulus californicus...
Background: Zoonotic cutaneous leishmaniasis is a major public health problem in Iran with the main vector of Phlebotomus papatasi. The use of entomopathogenic fungi for biological control of the vector is a potential substitute for the current methods which are being used. The purpose of the current study was to assess the virulence of two local i...
Entomopathogenic fungi (EPF) are important biological control agents in pest management programs in agroecosystems against insect pests. EPF such as Beauveria bassiana (Bals.) Vuillemin and Metarhizium anisopliae (Metchn.) Sorokin produce a wide range of extracellular enzymes involved in disturbance of the first barrier in the insect cuticle compri...
Fungi living within a plant ( i.e ., endophytic fungi) can directly affect the growth of the host plant or have indirect effects by affecting levels of damage to the plant caused by insect herbivory or plant pathogens. Greenhouse and field trials were conducted to investigate the endophytic effects of the fungus Beauveria bassiana on wheat, on the...
Bacillus thuringiensis Cry1I insecticidal proteins are structurally similar to other three-domain Cry proteins, although their size, activity spectrum, and expression at the stationary phase are unique among other members of the Cry1 family. The mode of action of Cry1 proteins is not completely understood but the existence of an activation step pri...
Tetranychus urticae (Acari: Tetranychidae) is one of the most important pests of agricultural crops with worldwide distribution causing considerable damage to different products. Application of chemical acaricides is one of the most important strategies used for control of this pest. Entomopathogenic fungi, however, have been proposed as alternativ...
Tetranychus urticae (Acari: Tetranychidae) is one of the most important pests of agricultural crops with worldwide distribution causing considerable damage to different products. Application of chemical acaricides is one of the most important strategies used for the control of this pest. Entomopathogenic fungi, however, have been proposed as altern...
In the present study, the cuticle-degrading enzymes production potential of five native Beauveria bassiana (TV, OZ, UN, DV and DE) isolates was investigated in the presence of cuticles from Eurygaster integriceps, Ephestia kuehniella and Zophobas morio. Furthermore, histopathology of infected insects by B. bassiana was studied. The level of cuticle...
The innate immune system of insects comprises both cellular and humoral mechanisms. The phenoloxidase activity and the production of antimicrobial peptides/ proteins (AMPs) are the most important parts of insect immune system. In this study, we investigated the humoral response of flour moth, Ephestia kuehniella challenged with two different entomo...
The spined soldier bug is a generalist predatory bug on many pest larvae across the world. The alimentary canal of this predator harbors facultative bacterial symbionts with unknown roles in the digestion and the development of their host. The present study deals with symbiotic roles in the production of digestive enzymes and development of Podisus...
Finding a bio-insecticide based on Bacillus thuringiensis (B.t) for controlling both insect pests and plant diseases, and protecting the plants under abiotic and biotic stress conditions would be highly valuable in agricultural production. Therefore, the aim of the present work was to evaluate the effect of the Iranian Bt strain AzLp on Beet armywo...
The cotton bollworm Helicoverpa armigera is one of the most devastating insect pests. A set of protease enzymes allows this species to feed on different host plant species. Control measures in agriculture often involve the application of the pathogenic bacterium Bacillus thuringiensis subsp. kurstaki (Btk). In the present study, the effects of subl...
In the present study, some isolates of Beauveria bassiana were isolated from different soil samples and their virulence was investigated against Sunn pest Eurygaster integriceps (Hem., Scutelleridae), flour moth, Ephestia kuehniella (Hym., Pyralidae), and king meal worm, Zophobas morio (Col., Tenebrionidae). Twenty-three isolates were isolated usin...
Characterization of new Bacillus thuringiensis strains is a valuable tool to discover novel insecticidal toxins and to manage resistance problems. In this study, seven Iranian Bt strains were selected according to their toxicity against Plodia interpunctella, to be thoroughly characterized based on their toxicity, protein profiling, proteomic analy...
Bacillus thuringiensis is a Gram-positive, aerobic, facultative anaerobic and endospore-forming bacterium. Different strains of this species have the ability to produce parasporal crystalline inclusions which are toxic to larvae of different insect orders and other invertebrates and cause rapid death of the host. To determine the importance of this...
Some defense reactions including cuticular lipids, phagocytic activity, nodulation and hemolymph phenoloxidasec activity were compared in Eurygaster integriceps, Ephestia kuehniella and Zophobas morio exposed to five different B. bassiana isolates. The cuticular lipids were stimulating on conidia germination possibly with no fungicidal or fungistat...
In this study, we investigated the efficiency of T. brassicae and T. embryo-phagum in combination with bacterial suspension of B. thuringiensis against the tomato leafminer T. absoluta eggs in cage inside greenhouse (semi field) experiments. Four treatments were used (T. brassicae or T. embryophagum + T. absoluta) (T1), (B. thuringiensis + T. absol...
The tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is among the most destructive pests that attack tomato in many countries. In this study, the efficiency of three suspensions (10 6 ; 10 5 ; 10 4 cell/ml) of Bacillus thuringiensis var. Kurstaki was tested on T. absoluta larvae 1 st , 2 nd , 3 rd and 4 th instar was assessed t...
The host preference in Encarsia formosa was studied when parasitoid receiving signals related to either untreated and Lecanicillium longisporum-treated Trialeurodes vaporariorum. The experiments were done by the type two selection experiment. The third instar nymphs of T. vaporariorum were used as parasitoid host. Untreated hosts sprayed with Tween...
Understanding the interactions among biological control agents, such as competition for the same host in intraguild predation, is a key component for successful biological control strategies. The pathogenic ability of Lecanicillium longisporum (Petch) Zare and Gams (Ascomycota: Clavicipitaceae) against the greenhouse whitefly, Trialeurodes vaporari...
Insect cuticle has many different materials which may have stimulating or inhibitory effect on conidia germination of entomopathogenic fungi. In the present study, effect of the cuticular extracts of three insects were investigated on conidial germination of two B. bassiana isolates. At first, 5th instar nymphs of Eurygaster integriceps Puton (Hem....
The entomopathogenic fungus Beauveria bassiana (Bals.) Vuill. is one the most important microbial control agents. Nowadays, most of its commercial products are used in integrated pest management all over the world. Isolation of the native isolates and investigation of their virulence is important. In the present study, 26 soil samples gathered from...
Tuta absoluta Meyrick (Lepidoptera: Gelechiidae), commonly known as the tomato borer, represents one of the tomato main pests since it had been explored. Eggs of the T. absoluta moth on tomato plants can be parasitized by variety species of Trichogramma as T. brassicae, T. evanescens and T. embryophagum. This study was conducted to test the behavio...
Effects of three nutritional levels of beet root molasses, cheese permeate, wheat bran extract, rice bran extract and Sabouraud , s Dextrose Broth (SDB) were evaluated for blastospore production by two isolates of Beauveria bassiana sensu lato. at an interval of 24 h for seven days. Depending on the isolate, maximum blastospore production was obtai...
Effects of spirodiclofen as a tetronic acid pesticide were studied on demographical characteristics of Orius niger, a voracious predator of Tetranychus urticae. Developmental time of the first, third and fourth nymphal stages of the predator was significantly influenced by the acaricide treatment, however, the total developmental time of pre-adult...
Olfactory response of Encarsia formosa to odors produced by untreated and treated whitefly that were
infested by fungi Lecanicillium longisporum was determined in an airflow Y-tube olfactometer. The
results indicated that the parasitoid response to odors from cucumber plants infested by whitefly compared
to whitefly and fungi free cucumber plants s...
The bacterium Bacillus thuringiensis (Bt) Berliner and the braconid wasp Habrobracon hebetor Say are valuable biocontrol agents attacking larval stages of Helicoverpa armigera (Hübner). Little information is available regarding combination of these biocontrol agents during integrated management of H. armigera. To address this knowledge gap, we docu...
Bacillus thuringiensis (Bt) is the most effective microbial control agent for controlling numerous species from different insect orders. All subspecies and strains of B. thuringiensis can produce a spore and a crystalline parasporal body. This crystal which contains proteinaceous protoxins is dissolved in the alkaline midgut, the resulting molecule...
Bacillus thuringiensis (Bt) is an efficient entomopathogen used for pest control. While Bt pathogenesis has been thoroughly studied, less is known about the biological effects of sublethal Bt exposure. To address this knowledge gap, we document sublethal effects of Bacillus thuringiensis var. kurstaki (Btk) on the biology and development of Helicov...
The two-spotted spider mite, Tetranychus
urticae Koch (Acari: Tetranychidae), is one of the most
important pests in agriculture. Due to its short life cycle
and high reproductive rate, this pest has become resistant
to most acaricides. Therefore, finding alternative
control strategies for this damaging pest is necessary.
Application of microbiologi...
Antimicrobial peptides (AMPs) are found as important components of the innate immune system (host defense) of all invertebrates. These peptides can be constitutively expressed or induced in response to microbial infections. Indeed, they vary in their amino acid sequences, potency and antimicrobial activity spectra. The smaller AMPs act greatly by d...
An insect or mite may gain selective advantage if it is able to detect entomopathogenic fungi from a distance and respond via behavioral avoidance or through post-contact responses such as grooming. Pathogens may contribute to the suppression of spider mites in combination with other arthropod natural enemies. Better understanding of the factors th...
The life table and parasitism rate of Diadegma insulare (Cresson) (Hymenoptera: Ichneumonidae), a larval parasitoid of the diamondback moth Plutella xylostella (L.) (Lepidoptera: Plutellidae), were studied at 25 ± 1°C, 65 ± 10% RH, and a photoperiod of 16:8 (L: D) h. The data were analyzed based on the age-stage, two-sex life table theory. Because...
Transgenic Bt cotton produces the Cry 1Ab toxin of Bacillus thuringiensis that developing against Helocoverpa armigera may be affected on secondary pest such as Bemisia tabaci. The laboratory experiments were conducted to evaluate the effects of direct or indirect exposure on the biology of non-target species. Also, we compared the performance of t...
Effects of Bacillus thuringiensis (Bt) on immature stages of Diadegma insulare (Cresson) (Hym., Ichneumonidae) within larvae of diamondback moth (DBM), Plutella xylostella (L.) (Lep., Plutellidae), and on the adult stage as a Bt-honey solution were evaluated at 25 ± 1 °C, 65 ± 10% r.h. and 16:8 h (L:D) photoperiod. P. xylostella and D. insulare pup...
The functional response of the predatory mite, Phytoseiulus persimilis Athias- Henriot was examined on either non-inoculated or inoculated adults of the spider mite, Tetranychus urticae Koch by Beauveria bassiana DEBI008 with four time intervals; 0, 24, 48 and 72-h treatments, at 25 ± 1 °C, 60–70 % RH and a photoperiod of 16:8 h (L: D). Results ind...
The entomopathogenic fungus Beauveria bassiana (Bals.) Vuill. is one of the important arthropod pathogens that can play an important role in the regulation of mite populations in agricultural ecosystems. In this study, the combined effect of a native isolate of fungus B. bassiana (EUT105) and ether-extract of plant, Ginkgo biloba was evaluated agai...
Effects of the entomopathogenic fungus Beauveria bassiana were studied on life
table parameters of two-spotted spider mite, Tetranychus urticae feeding on bean
and cucumber under laboratory conditions. The developmental periods for all
immature stages were not affected by fungal infection on each host plant but the
duration of larval stage was sign...
The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) is one of the most important pests that causes worldwide economic damages in agricultural crops. The
entomopathogenic fungi, Beauveria bassiana (Bals.) Vuill, is considered to be one of the
most important candidates for its control. Nowadays, application of microbial agent...
The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), has been
recorded on more than 150 economic crops throughout the world, that causes high crop
losses. During recent years, the main strategy for their controlling was the application of
chemical acaricides. The acaricide Spirodiclofen is a tetronic acid derivative that ha...
Effects of fungus, Lecanicillium longisporum was studied on reproductive capacity of Encarsia
formosa at laboratory conditions. Fungal infection on whiteflies was carried out using 9.5×105
conidia/ml of fungus on the third instar of whitefly exposing to parasitoid at four different time
intervals; 0, 24, 48 and 72 hours post-inoculation. Longevity,...
Cotton bollworm, Helicoverpa armigera Hubner is the most important pest of cotton, tomato and chickpea in Iran. The pest has been found to develop resistance against conventional insecticides. Using of insecticides with different mode of action may result an appropriate control of the pest and may delay insecticide resistance development. In this s...
Laboratory assays were carried out to evaluate the effect of methanolic extract of Artemisia annua L. on some biochemical compounds in the hemolymph of Hyphantria cunea Drury (Lepidoptera: Arctiidae). It was found that the activity levels of two aminotransferases and phosphatases increased after extract exposure. Activity of lactatae dehydrogenase,...
We studied the effect of different solid substrates on virulence of two Beauveria bassiana isolates against the browntail moth, Euproctis chrysorrhoea (L.) (Lep.: Lymantriidae). Conidia produced on wheat grains, wheat flour, wheat bran, rice flour, rice bran, rice paddy, corn flour, millet, and Sabouraud's dextrose agar with 1% yeast extract (SDAY)...
The generalist predator Orius albidipennis Reut. (Hem., Anthocoridae) and entomopathogenic fungus Metarhizium anisopliae (Metchnikoff) Sorokin (Ascomycota: Clavicipitaceae) are important biocontrol agents of Thrips tabaci Lindeman (Thys., Thripidae) in most greenhouses. In this study, we estimated searching time, feeding time and predation rate in...
The virulence of Beauveria bassiana to one of the most important pests of agricultural and ornamental plants, Tetranychus urticae, was assessed by inoculating mites with different isolates (DEBI008, EUT116) and different concentrations of conidia (1 × 10, 1 × 10, 1 × 10, 1 × 10, and 1 × 10 conidia/ml). Treated mites were kept in controlled conditio...
The survival of a braconid parasitoid Habrobracon hebetor was investigated on nucleopolyhedrovirus (NPV)-infected Spodoptera exigua larvae. The second-instar larvae were exposed to 30, 51.4 and 180 PIB/mm of Mamestra brassicae NPV (MbMNPV) as under-LD50, LD50 and over-LD50 values, respectively. They were accessible to be parasitized by H. hebetor a...
The fall armyworm, Hyphantria cunea Drury (Lepidoptera: Arctiidae) is an insect native to NorthAmerica that was recently introduced into Iran resulting in severe damage to trees and agriculturalproduction. An experiment was conducted to examine potential effects of medicinal plants, Artemisiaannua and Lavandula stoechas and the insect pathogenic ba...
Environmental conditions in addition to divalent cations may affect the interactions between pathogens and insects. Elucidation of factors which modulate insect immune responses could be a significant part of investigations in this area. In this study, adults of Eurygaster integriceps, as the destructive pest of wheat, were kept at different temper...
The wettable powder was prepared on the basis of aerial conidia of two isolates of the entomopathognic fungus, Beauveria bassiana. Viability and pathogenicity of conidia products were evaluated against the second-instar larva of Thrips tabaci in four cases; Conidial-product Maintained in Refrigerator (CMR), Conidial-product Maintained in Laboratory...
Horizontal transmission of an isolate of the etomopathogenic fungus, Beauveria bassiana KCF102, was examined by allowing inoculated Eurygaster integriceps Put. adults to mate with non-inoculated ones. In case of susceptibility to B. bassiana, there was no significant difference between the males and females. However, there was significant differenc...
The ability of thrips and other minute insects to escape from conventional assay cups led to development of a successful assay chamber. In the present study, we evaluated three bioassay systems for thrips; Tashiro cage, microtube assay and leaf sandwich assay and introduced an improved thrips entomopathogenic bioassay system (TEBS). Our objective w...
The effect of one entomopathogenic virus (PxGV) was studied on cabbage moth Plutella xylostella with hope to find management strategies of this insect, based on biological control. Bioassay showed that, this virus has high virulence and can be considered as the important agents on the control of this insect. The LC50 value of PxGV for second instar...
The general predator Orius albidipennis and entomopathogenic fungus Metarhizium anisopliae arethe most important natural enemies of Thrips tabaci in most area. In this study, we estimated some behavioral parameters such as Searching Time (ST), Feeding Time (FT) and Predation Rate (PDR) in O. albidipennis eating on healthy and infected thrips larvae...
Three different germination types of conidia; unidirectional, bidirectional and multidirectional, were revealed through microscopic observations for eight Beauveria bassiana isolates germinated on Sabouraud dextrose agar. Canonical correlation analysis indicated that there is a positive correlation between unidirectional germination and virulence a...
Ten Beauveria bassiana isolates were characterized using the following parameters: virulence, morphological measurements, germination in solid and liquid media, in vitro growth and physiological changes in liquid media. There were significant differences in mortality of second-instar larvae of the diamondback moth (DBM), Plutella xylostella (Lepido...