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Samira Sinaie,Hussein Sadeghi-Namaghi,Lida Fekrat 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.1
Weather events such as drought and elevated atmospheric CO 2 are likely to interact with plants in numerous ways with diverse mechanisms. As a consequence of changes in quality of plants, the performance parameters and population dynamics of herbivores are expected to be influenced. In this study, a split-plot design was used to evaluate the interaction of elevated CO 2 and irrigation regime on population growth of the two-spotted spider mite, Tetranychus urticae Koch (Tetranychidae: Tetranychini), feeding on sweet pepper, Capsicum annum L. (Solanaceae), in environmentally controlled chambers. Results showed that exposure to elevated CO 2 significantly increased the C/N ratio in sweet pepper plants. Except in case of the adult stage, elevated CO 2 did not significantly increase the population density of other developmental stages or the overall population of T. urticae. However, water stress by itself and in combination with elevated CO 2 had significant effects on per capita population growth rate (r) and population density of mites. Maximum growth rate and population density of mites were observed at a combination of elevated CO 2 and intermediate water stress. Further studies, especially in field conditions, investigating the impact of elevated CO 2 and water stress on population size and growth of herbivores in other plant species may contribute to a greater understanding of the implications of global climate change on future crop productivity.
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Asiyeh Notghi Moghadam Seyede,Sadeghi-Namaghi Hussein,Moodi Saeed 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.2
Drought phenomenon as a consequence of climate change may become a major limiting factor for agricultural systems, and its impacts on plant-insect interactions are only partially understood. Addressing this issue, lifehistory responses of the jujube lace bug were evaluated on jujube tree under three water treatments (control, moderate and severe drought stress). Performance responses of the jujube lace bug were evaluated under controlled conditions using arenas consisting of jujube leaves inside Petri dishes. Plant biochemical measure ments showed that leaf chlorophyll a, b, and total chlorophyll content, were higher in moderate water stress treatment than other treatments while Total Soluble Solids, total carbohydrate, and proline concentrations were increased in drought stress. Also, the lowest amount of carotenoid, phosphorous, sodium content was measured in severe drought stress treatment. The life history responses of Monosteira alticarinata showed that mean oviposition period and life span were statistically higher on moderate water stress than other treatments. The lowest intrinsic rate of increase (r), the finite rate of increase (λ), the net reproductive rate (R 0 ), gross rate reproduction (GRR), total fecundity, and the highest doubling time (DT) were measured on severely drought stress treatment. An increase on the performance of the lace bug can be due to an increase on the chlorophyll, nitrogen, protein and free amino acids in moderate water stressed plants. However in severe stress it do worse. Overall, this study revealed that sap feeders benefit from moderate water stress.
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Prey preference and prey switching in Anthocoris minki Dohrn (Hemiptera: Anthocoridae)
Maryam Hassanzadeh-Avval,Hussein Sadeghi-Namaghi,Lida Fekrat 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.4
The understanding of host specificity of predacious insects is one of the most important problems in the investigation of biological control. Prey preference and the potential for prey switching in Anthocoris minki Dohrn (Hem.: Anthocoridae) was assessed in two- choice experiments under environmentally controlled conditions. Manly's preference index was used to compare A. minki predation on Agonoscena pistaciae Burckhardt and Lauterer (Hem.: Psyllidae) versus Psyllopsis repens Loginova (Hem.: Psyllidae) but showed no statistically significant evidence for preference. Anthocoris minki did prefer psyllids (Agonoscena pistaciae and Psyllopsis repens) over aphids (Forda hirsuta Mordvilko (Hem.: Pemphigidae) and Aphis craccivora Koch (Hem.: Aphididae)). The predator also consumed significantly more 2nd instar than 4th instar nymphs of P. repens. Switching behavior experiments showed that A. minki did not preferentially attack the most abundant prey when the prey combination was either biased toward A. pistaciae or toward F. hirsuta. Linear regression between preference indices and prey ratios indicated an overall preference for psyllids over aphids. The results suggest that a psyllid-specialized feeder such as A. minki is more likely to be effective biocontrol agent against psyllid species and less effective at reducing the numbers of other pest species that might co-occur with psyllids.
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Mahmood Mehrafrooz Mayvan,Hussein Sadeghi-Namaghi,Masoumeh Shayanmehr,Penelope Greenslade 국립중앙과학관 2021 Journal of Asia-Pacific Biodiversity Vol.14 No.4
This article provides an annotated catalog of the Symphypleona and Neelipleona (Hexapoda: Collembola)of Iran based on published literature and specimens recently collected from three different ecosystems inNorth Khorasan province (Forest, Rangeland, and Agricultural) of the years 2018 and 2019. Thirty-fivespecies in seven families and 17 genera are listed. Among them, Megalothorax minimus and Bourletiellasp. are recorded for the first time from Iran. An updated key to the Iranian species and information on thebiology and geographical distribution of each species is provided.
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Ali Reza Amiri-Jami,Hussein Sadeghi-Namaghi 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.3
Laboratory experiments were conducted to determine the functional and numerical responses of theaphidophagous hover fly Episyrphus balteatus DeGeer (Diptera: Syrphidae) to different densities of 4th instarblack bean aphids, Aphis fabae Scopoli (Homoptera: Aphididae), on broad bean, Vicia faba L. (Fabaceae). Twodifferent-sized larvae of predators were tested in different densities of similar-sized prey to determine whetherfunctional response parameters depended on the body sizes of predator and prey. In numerical response experiments,gravid E. balteatus females were exposed individually to different densities of 4th instars of A. fabae on cutsections of the broad bean plant, V. faba L. Logistic regression suggested a type II functional response for bothlarval sizes of E. balteatus. The searching efficiency (a) of the larger larvae was higher than that of the smallerones. Prey consumption was higher, and handling time (Th) was lower for larger larvae than smaller ones. Thetheoretical maximum number of A. fabae nymphs eaten by the different-sized larvae was 125 and 269 nymphsper day. Larger E. balteatus larvae are more efficient predators for aphidmanagement strategies. The reproductivenumerical response, in terms of the number of eggs laid, increased curvilinearlywith increasing prey density, butthe proportion of eggs laid (egg number/prey density) decreased as the initial density of prey increased.
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