فصلنامه تحقیقات حشره شناسی
سال دوازدهم شماره 4 (پیاپی 48، زمستان 1399)

The Chrysididae (Hymenoptera: Chrysidoidea), commonly known as cuckoo wasps or emerald wasps, are a cosmopolitan family of aculeate wasps and include about 3,000 species in the world. Chrysis Linnaeus, 1761 is a large, cosmopolitan and diverse genus in this family (Chrysidinae, Chrysidini), with over 1100 described species and subspecies and many more to be discovered. A list of twelve species of the genus Chrysis collected in the Fars Province of Iran is presented. Specimens were collected by Malaise traps during 2013-2017. The specimens were identified based on morphological characters mentioned in different taxonomic keys and their original descriptions. Six species: Chrysis amneris Balthasar, 1953, Ch. dawahi Strumia, 2011, Ch. diacantha diacantha Mocsáry, 1889, Ch. laeta Dahlbom, 1854, Ch. santschii Linsenmaier, 1959 and Ch. taurica Mocsáry, 1889 are newly added to the Iranian wasp fauna. The total number of Iranian Chrysis currently increased to 130 species and subspecies

Pseudoscorpion, also known as the false scorpion or book scorpion, is belonging to the arachnida class. They can be found in virtually all terrestrial habitats, but are most common in leaf litter, in soil, and under the bark of trees and logs. In spite of this widespread, the results of pseudoscorpion fauna are still poor in Iran. This study was based on specimens collected in different localities from the province of Lorestan, during 2016-2017. The pseudoscorpionids specimens were gathered directly by hand or with an entomological aspirator from leaf litter or under stone. For their taxonomic study, the specimens were cleared in lactic acid, subsequently mounted on glass microscope slide in Hoyer’s medium (Gum Arabic 15g, Chloral Hydrate 75g, Distilled Water 25ml, Glycerin 5ml), and studied using Olympus CH-2 compound microscope. The measurements were taken using calibrated ocular micrometer (WF10X–18MM). Figures were drawn with a drawing tube attached to the microscope. The others inspected as temporary slides made by glycerin. a new pseudoscorpion species, Chthonius youtabae n. sp.is described and figured based on females collected from Lorestan province-western Iran.

Species diversity is one of the most important indicators of changes in ecosystems. This subject always considered as a significant point in ecosystem. Mesotigmatid mites are the largest order among Parasitiformes mites. The main purpose of this survey was evaluating of species diversity of mites among Mesotigmata during the 2018 in Shiraz city. In each region, 2 habitats of urban green space (Landscape) trees and orchard trees were selected. Continuous soil sampling was performed every 2 weeks. A total of 1252 specimens belonging to 22 species from 11 families and 8 host plant were collected. Calculation of biodiversity indices based on species abundance and data analysis using Simpson, Shannon-Wiener, Pete, Manning and Margalf indices, using Microsoft Excel 2016 was calculated. Our finding shower that biological indicators are significantly different according to vegetation and sampling seasons. Based on LSD test to compare indices in different seasons of the year, spring with 0.913 Simpson indices, Shannon-Wiener 2.569, Pete 0.9482, and Margalf 2.815 had the highest values while in the index. Also according to this test, green space had the highest indices with 0.837 Simpson, 2.154 Shannon-Wiener, 1.362 Manning and 2.55.  the highest diversity observed relative frequency with 54.04% belonged to the Laelapidae family. The highest frequency of specimens among fruit trees was related to pomegranate with 204 and among urban green space trees belonged to poplar with 333 specimens.

Pistachio psylla, Agonoscena pistaciae Burckharat & Lauterer (Hem., Psyllidae), is the most important pest of pistachio orchards in Iran. It causes to reduce the quantity and quality of the product. Nowadays, because of environmental side effects, resistance development and residues in human food the application of safe insecticides was increased in order to reduce the use of chemical insecticides. Therefore, the effect of two mineral powders was studied including diatomaceous earth and silica on A. pistaciae in the field experiment. The factorial experiment with a randomized complete block design including two types of compounds with three concentrations and six sampling times were used in the crop year 2019. Treatments were included three concentrations of diatomaceous earth (4, 6 and 8 per thousand) and two concentrations of silica (4 and 8 per thousand) and control treatment (water without mineral powders) were sprayed over the whole tree canopy. The total number of eggs and adults were counted 3, 8, 13, 18, 21 and 28 days after treatment on the randomly collected leaves. All of treatments and sampling dates were significantly different on egg of A. pistaciae and diatomaceous earth 6 per thousand (+Dimethicone) and 8 per thousand were the most efficient on the means number of eggs during 8 to 13 days after treatment. While in adult stage only 3 and 8 days after treatment significant difference was observed between treatments and two previously effective treatments on eggs, had most effect in adults reduction in the means number of adults per leaf, during  18 to 23 days after treatment. Based on this study, different concentrations of diatomaceous earth were the most effective on eggs and adults.

Pistachio is one of the most important and economical agricultural products of Iran from the standpoint of exportation. Iran is the first largest producer of pistachio in the world. Due to expansion of pistachio orchards in Kermanshah province, this research was done in 2017, 2018 and 2019 to identify the pests of these trees. Different sampling methods such as direct collection, rearing in laboratory, sweep in net, white tray, light trap, aspirators were used to collect insects. Finally, 13 species of insect pests including Sulamicerus stali Fieber, Agonoscena pistaciae Burckhardt and Lauterer, Forda hirsuta Mordvilko, Anapulvinaria pistaciae Bodenheimer, Lepidosaphes pistaciae Archangelskaya, Acrosternum heegeri Fieber, Polydrosus davatchii Hoffman, Anthaxia judinae Stepanov, Carphoborus perrisi Chapuis, Recurvaria pistaciicola Danilewski, Eurytoma plontnikovi Nikolskaya were reported on pistachio trees in pistachio orchards. Labidostomis luristanica Warchalowski (Col .: Chrysomelidae) was first report from Kermanshah province and Thrips minutissimus Linnaeus (Thy .: Thripidae) is reported for the first time on pistachio trees.

Preserving and increasing the insect biodiversity is considered as one of the most important components in pest control without the use of chemical pesticides and plays an important role in reducing environmental pollution and achieving sustainable development. Dolichopodidae, the long-legged flies, with more than 7500 described species in about 276 genera is the most important and biggest family of the superfamily Empidoidea. Adults and larvae of the most species are predators of other insects. In the present study, in order to investigate the fauna of the family Dolichopodidae, sampling was performed using entomological nets and Malaysian traps in 2017-2018 in Tehran and Alborz provinces. Species diversity studies showed that the diversity of this family in the areas with high humidity and mixed and abundant vegetation is more than other areas.