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      • Open Access Article

        1 - The effect of host plant on the functional response of Stethorus gilvifrons Mulsant
        Neda Kheradpir Jafar Khalghani Hadi Ostovan Mohammad Reza Rezapanah
        Functional response is considered as one of the most important predator-prey interactions which affected by different factors including host plant characteristics. The effect of leaf surface on functional response of Stethorus gilvifrons Mulsant in larval and adult st More
        Functional response is considered as one of the most important predator-prey interactions which affected by different factors including host plant characteristics. The effect of leaf surface on functional response of Stethorus gilvifrons Mulsant in larval and adult stages to Tetranychus urticae Koch were studied on three hybrids of cucumber leaves. The results demonstrated that leaf surface of host plants, different prey densities and their interactions affect on the numbers of prey killed by a predator. Logistic regression indicated type III functional response for larvae on all hybrids and adult females on Fadia and Sulan hybrids and males on Fadia and Sina leaves. The results of handling time and attack rate emphasize on the importance of physical traits of plant on the performance and searching efficiency of natural enemies that should be considered for optimizing their application in mite biological control.   Manuscript profile
      • Open Access Article

        2 - A report of Physa acuta presence from Jajrood River, east of Tehran province
        Zahra Chahardehi Damghan Siamak Yousefi Siahkalroudi Neda Kheradpir
        Molluscs are among the most important group of agricultural plant pests. Physa acuta, as an invasive species in horticulture, vegetables and specially rice farms takes a serious attention. In this study, through sampling from four pints in Jajroud River including Fasham More
        Molluscs are among the most important group of agricultural plant pests. Physa acuta, as an invasive species in horticulture, vegetables and specially rice farms takes a serious attention. In this study, through sampling from four pints in Jajroud River including Fasham, Saeed Abad, Khojir and Pakdasht, the species was reported from all the sampling points. There were no samples collected in summer season and samples collected in spring and autumn showed no significant difference in morphological features. The presence of the species would be considered as an alarm for further invasion to farms and gardens along the riverside. Manuscript profile
      • Open Access Article

        3 - The antifungal effect of several essential oils on Ascochyta rabiei, the causal agent of chickpea Ascochyta blight in vitro and greenhouse conditions
        Mohammad Samari Mojdeh Maleki dariush shahriari Neda Kheradpir
        One of the greatest biotic stress reducing potential yield in chickpea is Ascochyta blight caused by Ascochyta rabiei Pass. (Labr.) which is distributed worldwide. Due to its severity and to decreasing the environmental biological impact of chemical control, research on More
        One of the greatest biotic stress reducing potential yield in chickpea is Ascochyta blight caused by Ascochyta rabiei Pass. (Labr.) which is distributed worldwide. Due to its severity and to decreasing the environmental biological impact of chemical control, research on natural compounds like plant essential oils would be a helpful step in the disease management. In this study, the antifungal efficacy of essential oil of eight plants including thyme, savory, pennyroyal, mint, tarragon, fennel, cumin and ajwain at 5 concentrations in 3 replications under complete random design was evaluated. Characteristics like mycelial growth inhibition (MGI), inhibitory minimum concentration (IMC) and speed of colony growth after treatment were studied under laboratory condition. Pathogenicity index was studied under greenhouse condition by the selected plants through laboratory tests in comparison with the fungicide Rovral-TS and intact and infected controls. Result showed that at greenhouse, thyme and fennel showed the most inhibitory index in comparison with the rest six plants. Fennel showed the most effective MGI against Ascochyta blight at laboratory. The result of the present study show that thyme and fennel would be great options to be considered in the integrated management programs of chickpea Ascochyta blight. Manuscript profile
      • Open Access Article

        4 - Diversity of arthropod pests and their ecological natural enemies in mushroom production units in Zarandieh region, Markazi province
        Mojtaba Tanha Neda Kheradpir
        Today mushroom cultivation has become one of the money making sources in industry and trade all around the world. Due to its production system, this rich nutritional product is under the attack of several pest agents. In this study, the arthropods existing in mushroom c More
        Today mushroom cultivation has become one of the money making sources in industry and trade all around the world. Due to its production system, this rich nutritional product is under the attack of several pest agents. In this study, the arthropods existing in mushroom cultivation systems was collected through two production stages, spawning and casing from six production units in Zarandieh county, Marakazi province. Samples were separated by Berlese funnel and retained in Ethanol 70%; then identified by certified resources. The abundance of each species was caulcuated and the mean density of different species were compared statistically. In total, 1814 samples belonging to different orders of Insecta and Acari were collected. 790 samples were collected through spawning and 1024 samples through casing. Collected arthropods belonging to 15 species under 14 genera and 11 families. Tyrophagus putrescentiae was the most abundant species (18.91 ± 2.06%) with significant difference. Megaselia halterata (14.39± 1.88 %) and Lycoriella auripila (11.87 ± 0.47) were the most abundant species, subsequently. Among the collected species, two predators, Atheta coriaria and M. galber were identified. Most of the collected species were saprophagous and infected compost would be a possible way to introduce them into the mushroom cultivation systems. Samples like M. halterata, Megaselia scalaris, L. auripila, Colbodia fuscipes and T. putrescentiae were mycophagous and could make direct damage to mushroom product. Compost sterilizing would be an effective way to eliminate pest arthropods in mushroom cultivation systems. Manuscript profile
      • Open Access Article

        5 - Bioassay study of two native Iranian isolates of Bacillus thuringiensis (YD5 and 81) on Leptinotarsa decemlineata Say
        Maryam Mahdavi Mohammad Reza Rezapanah Ghadir Nouri Ghanbalani3 Gholamreza Salehi Jozani Neda Kheradpir
        Bioassay of two native isolates of Bacillus thuringiensis (YD5 and 81) on Colorado potato leaf beetle Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae) as a serious pest of potato crop was performed. Variance analysis and mean comparison of the mortality percent More
        Bioassay of two native isolates of Bacillus thuringiensis (YD5 and 81) on Colorado potato leaf beetle Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae) as a serious pest of potato crop was performed. Variance analysis and mean comparison of the mortality percentage showed significant difference between standard isolates and native isolates in all the concentration. Although native isolates showed no acceptable results, there are some hopes to use them in higher concentrations. Manuscript profile
      • Open Access Article

        6 - The inhibition effect of thyme and ajwain extracts on Fusarium solani f. sp. phaseoli
        Roghieh ganji Mojdeh Maleki Neda Kheradpir
        Fusarium root wilt by Fusarium solani f. sp. phsaeoli is one of the most import soil borne diseases of bean crops world-wide. Currently the control of the disease using fungicides is present in most of the technical recommendations, despite the environmental side effect More
        Fusarium root wilt by Fusarium solani f. sp. phsaeoli is one of the most import soil borne diseases of bean crops world-wide. Currently the control of the disease using fungicides is present in most of the technical recommendations, despite the environmental side effects. Therefore, this study was conducted with the aim of identifying healthy control solutions such as the use of plant essential oils and extracts. In this study, the inhibition effect of the essential oils of two plants was investigated in laboratory conditions on the pathogenic fungus. Iperidoine+Carbendazim fungicide, 1.5/1000 was used as a comparison criterion in experiments. The studied features were the speed growth rate of the fungus and the mycelial growth inhibition five concentrations of the studies plants. Results showed that MGI was 58.30 % for thyme in 100 ppm and 41.17 % for ajwain at 100 ppm. The fungicide showed the highest MGI rate at 78.53 % and thyme extracts at the highest concentration was not at the same Duncan group with the fungicide. According to the results, it can be concluded that thyme extract would be an alternative for the common fungicides to control Fusarium root wilt. Manuscript profile
      • Open Access Article

        7 - The role of chemical ecology in plant-natural enemies relationships
        Neda Kheradpir
        Allelochemicals are the main manager of interspecific relations which can convey different types of relations and behaviors of different organisms according to the chemical compound and its concentration, sender and receptor species. It is committed in plant world and p More
        Allelochemicals are the main manager of interspecific relations which can convey different types of relations and behaviors of different organisms according to the chemical compound and its concentration, sender and receptor species. It is committed in plant world and plant apply infochemicals with different tasks to level up their fitness and employ natural enemies belong to Arthropoda for higher survivorship. In this paper, a review of previous researches on plant-natural enemies chemical ecology is presented. Manuscript profile
      • Open Access Article

        8 - Oviposition preference of Jasmine whitefly Aleuroclava jasmini on two olive varieties in Tehran city
        Masoumeh Darvishi Neda Kheradpir
        Jasmine whitefly Aleuroclava jasmini, is an economic serious pest with high level of yield damage in citrus orchards which is mainly controlled by chemical methods. Planting the resistant plants could be a very helpful replacement method for chemical control which neith More
        Jasmine whitefly Aleuroclava jasmini, is an economic serious pest with high level of yield damage in citrus orchards which is mainly controlled by chemical methods. Planting the resistant plants could be a very helpful replacement method for chemical control which neither has the negative impact of the chemical control on environment, nor impacts on the other controlling methods. Olive trees belonging to Oleaceae and as a very important host for the whitefly species has been selected in this experiment. Oviposition rate of the female jasmine whiteflies were counted daily on two main olive varieties, Yellow and Manzanila, under 27±2 °c, RH=60±5% and photoperiod of 16L:8D. The results showed that higher oviposition rate on Manzanila proved that it would be a more suitable host for jasmine host. The obtained results would be applied in jasmine whitefly management programs in Tehran city.   Manuscript profile
      • Open Access Article

        9 - The study of biological differences between two native isolates of Bacillus thuringinesis (KH4 and GN9) on potato leaf beetle Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)
        Maryam Mahdavi Mohammad Reza Reza Panah Ghadir Nouri Ghanbalani Gholamreza Salehi Jozani Neda Kheradpir
        Colorado potato beetle Leptinotarsa decemlineata Say has numerous hosts as a serious potato pest. There are several biological control agents which are used to control the pest and Bacillus thuringiensis can be the most important. In order to estimate the LC50, this stu More
        Colorado potato beetle Leptinotarsa decemlineata Say has numerous hosts as a serious potato pest. There are several biological control agents which are used to control the pest and Bacillus thuringiensis can be the most important. In order to estimate the LC50, this study started by the bioassay performed with the standard cultured isolate from the Custom BC sample. The concentration killing 50% of larva population was assessed as 2506.63 CFU/ml. Probit statistical software was used to show the difference among native and standard isolates in a complete random design. Two native isolates (KH4 and GN9) were used as treatments. The variance analysis and comparing the mean mortality percentage of Colorado potato beetle in second instar larvae demonstrated a significant difference between treatments and the standard isolate in all the concentrations. The standard isolate had the highest mortality percentage of 62% and the native isolates showed less than 5% of mortality. It is understood that the selection of the proper concentration (about LC50) and comparison of the mortality percentage in that concentration is an appropriate method for the screening the isolates and make a lot of time and money saved. Manuscript profile