Hossein Ranjbar Aghdam

• Professor
• Professor at Iranian Research Institute of Plant Protection

Cryptoleamus montrouzieri is the most important natural enemy of Pseudococcus citri. The effects of different temperatures and different densities of C. montrouzieri on predation rate, searching efficacy and mutual interference of the mentioned coccinellid feeding on the nymphs of P. citri was studied. Hassel and Varley model was applied for estima...

Corn stem borer, Sesamia cretica Lederer, is an important pest of corn and sugarcane worldwide. The validation of a linear and some selected nonlinear models in semi-field and field conditions regarding the development time of the Varamin and Rey populations of S. cretica was performed. Our previously published laboratory data on the development ra...

These are the photos of a salty mountain in Hormozgan province near Daarbast village that I took during my collecting trip to southern Iran. This mountain is one of the several natural attractions in the province. The mountain is composed of salt crystals with colorful textures and beautiful cuts by nature over time. A salty stream is flowing down...

Following the publication of [...]

Corn stem borer, Sesamia cretica Lederer is an important pest of corn and sugarcane across the globe. The development rate and thermal constant of S. cretica were determined at ten constant temperatures ranging from 12 to 36 (± 1) °C, 50 ± 10% RH and a photoperiod of 16:8 (L:D) h for the Varamin and Rey populations of the pest in laboratory conditi...

Note to our foreign members The newsletter of the Entomological Society of Iran (ESI) has been published quarterly in Persian since 1999. It covers various scientific issues and public events on national and overseas entomology and related disciplines. It is intended that the information of the board and the members of the society would be shared a...

Olive fruit fly, Bactrocera oleae (Rossi), is one of the most important and main pests that attack olives all around the world, especially in Mediterranean countries. This research was done to study some biological characteristics of the pest in two years. This pest has three to five generations in the Tarom sofla area of Qazvin province. Results s...

Simple Summary This study models the effects of temperature on age-dependent fecundity of the ladybird Stethorus gilvifrons, which is an important predator of herbivorous spider mites such as Tetranychus urticae. Based on the fecundity of S. gilvifrons fed on T. urticae, examined at six constant temperatures from 15 to 34 °C, we generated thermal p...

Note to our foreign members The newsletter of the Entomological Society of Iran (ESI) has been published quarterly in Persian since 1999. It covers various scientific issues and public events on national and overseas entomology and related disciplines. It is intended that the information of the board and the members of the society would be shared a...

Simple Summary The ladybird Stethorus gilvifrons is an important natural enemy of herbivorous two-spotted spider mites, Tetranychus urticae. Here, we modeled the effect of temperature, which is the most significant abiotic environmental factor, on the development and thermal thresholds of S. gilvifrons. Thermal parameters and developmental trajecto...

Simple Summary The sugarcane stem borer, Sesamia nonagrioides (Lefebvre), is the most important pest of sugarcane in Iran and some other regions of the world. Variation in the resistance of six commercial sugarcane cultivars to S. nonagrioides was investigated using the oviposition preference, life history, and population growth parameters. Moreove...

The pink stem stalk borer, Sesamia cretica Lederer, is the main insect pest of sugarcane, Saccharum officinarum L., in Iran and worldwide. This paper assesses the effects of six sugarcane cultivars on the feeding performance and enzymatic activity of S. cretica under controlled conditions. It also investigates the biochemical traits of sugarcane cu...

Olive fruit fly Bactrocera oleae (Rossi) (Dip: Tephritidae), is a phytophagous insect associated to olive trees (Olea europaea, Oleaceae) and widespread pest in the olive growing countries in the Mediterranean Basin. In some years, due to the favorable weather conditions, with its larvae feeding monophagously on olive fruits, the fly is considered...

Stethorus gilvifrons (Mulstant) is an important voracious predator of the spider mites, which consumes all the life stages of spider mites. In this study, the effects of prey species and host plants on development and life table parameters of S. gilvifrons were studied. To this end, preimaginal development, survival, adult longevity and fecundity o...

The pink stem borer, Sesamia cretica Lederer is considered as the main insect pest of maize and sugarcane worldwide. Reproductive and life table parameters of two populations of S. cretica were studied at 10 constant temperatures ranging from 12 to 36 (±1)°C, 50 ± 10% RH and a photoperiod of 0:24 (L:D) h for the larval stage and 16:8 (L:D) h for th...

Population density and dispersion pattern of Sesamia cretica Led. was determined in maize fields in Varamin (Ahmadabad and Khaveh) and Rey (Aminabad and Talebabad) areas (Tehran, Iran) during two agricultural seasons, 2017 and 2018. A whole plant of maize was selected as a sampling unit to estimate the number of S. cretica larvae. The highest popul...

Background The common green lacewing Chrysoperla carnea (Steph.) (Neuroptera: Chrysopidae) is a polyphagous and efficient predatory species commonly found in a wide range of agricultural habitats. It plays an important role in biological control of pests. Main body The effect of temperature on developmental rate of the predator C. carnea was studi...

Stethorus gilvifrons is considered as one of the most important predators of the spider mites. Current study was conducted to examine the effect of temperature on life table parameters of the predatory coccinellid, S. gilvifrons Mulstant. The predatory coccinellids were originally collected from sugarcane fields of Khuzestan province and were reare...

Stethorus gilvifrons is one of the most important monophagus predators of Tetranychus urticae. In this study, demographic parameters of S. gilvifrons were compared between solitary and group (5 pairs of the predator) rearing systems feeding on different developmental stage of T. uricae at 27±1°C temperature, 60±10% RH and a photoperiod of 16:8 h. L...

The effects of maize and sugarcane were studied on the demographic parameters of Sesamia nonagrioides under controlled environmental conditions. Life table parameters were estimated using age-stage two-sex life table method. Total developmental times of immature stages were 53.51 ± 0.42 and 39.58 ± 0.14 days on maize and sugarcane, respectively. Th...

Demographic parameters of the pink stem borer, Sesamia cretica Lederer (Lepidoptera: Noctuidae) were estimated on its two main host plants, maize and sugarcane. The present study was conducted under laboratory conditions at 27±1˚C, 50±10% Relative Humidity (RH %), and a photoperiod of 0:24 (L:D) hour for the larval stage and 16:8 (L:D) hour for the...

Stem borers have various types, but major damage is directed to Sesamia cretica and Sesamia nonagrioides. At present due to the increasing damage of this pest and vast use of chemical control, particular attention to the use of alternative methods to control them. One of the methods considered are the use of synthetic pheromone. Due to lack of prop...

Considering damage of stem borers, Sesamia cretica and Sesamia nonagrioides in maize and sugarcane fields, specialists focused on application of biological control methods using specific egg parasitoid wasp, Telenomus busseolae and mass rearing of the mentioned stem borers as specific hosts of the egg parasitoids. In this research, the effect of na...

Applying a precise forecasting method is necessary to achieve acceptable results in IPM programs. Performances of the wing and delta pheromone traps for forecasting the codling moth phenology were compared with physiological time data based on Degree-Hours. Six pheromone traps (three wing and three delta style) were applied for the monitoring of th...

We studied the developmental time of immature stages of codling moth at eight constant temperatures ranging 10-35ºC and modeled their developmental rate, as a function of temperature using thirteen published non-linear and two linear models.

The effect of temperature on demographic parameters of the greater wax moth, Galleria mellonella (L.) was studied at 23, 25, 27, and 30 °C, 50 ± 10% RH and a photoperiod of 16:8 (L: D) h. The life table parameters were estimated according to the age-stage, two-sex life table procedure. In addition, the bootstrap technique was employed for estimatin...

Effect of temperature on development of pink stem borer, Sesamia cretica Lederer, was studied at eight constant temperatures (15, 18, 20.5, 24, 27, 30, 34, and 38°C), a photoperiod of 16:8 (L:D) h, and 50-60% rela\tive humidity. The larvae of pink stem borer were reared on cutting stems of maize. The results showed that temperature had statisticall...

In order to provide a phenological forecasting model, estimation of lower temperature threshold and thermal requirements are necessary. Therefore, current study was carried out to estimate lower temperature threshold and thermal requirements of Sesamia cretica Led., using Degree-days and Ikemoto and Takai linear models. Developmental times of the c...

Temperature-dependent development of the common green lacewing, Chrysoperla carnea was studied at four constant temperatures, 20, 25, 27 and 30ºC, 50 - 60% RH and a photoperiod of 16L : 8D h in growth chamber. Developmental rate of incubation period (egg), larval instars, pupal period and overall immature stages of the common green lacewing increas...

The sugar beet, Beta vulgaris L., has some key pests in Iran that causes losses in crops. One of these pests is Egyptian leaf worm, Spodoptera littoralis (Boisd). In addition to southern regions of Iran especially in Khuzestan province, this pest is distributed throughout the countries around the Mediterranean region. One of the most effective cont...

Life cycle parameters were estimated for development, longevity, fecundity and oviposition period, of the mealybug predator, Cryptolaemus montrouzieri Mulsant (Col.: Coccinellidae) fed on Planococcus citri (Risso) (Hem.: Pseudococcidae) reared on coleus plant, Solenostemon scutellarioides (L.) Codd.. All experiments were conducted in laboratory at...

Developmental rate of immature stages and age-specific fertility of females of codling moth at constant temperatures was modeled using non-linear models. The equations of Enkegaard, Analytis, and Bieri 1 and 2 were evaluated based on the value of adjusted R 2 (R 2 adj) and Akaike information criterion (AIC) besides coefficient of determination (R 2...

Developmental rate models and biological parameters estimated from them, especially lower and upper temperature thresholds and optimal temperature, can help to forecast phenological events of codling moth, Cydia pomonella L. (Lepidoptera: Tortricidae), in apple orchards. We studied the developmental time of immature stages of codling moth at eight...

Age-specific life table parameters and survivorship, adult longevity, reproduction periods, fertility, and sex ratio of the codling moth were studied at eight constant temperatures (10, 14, 20, 25, 27, 30, 33, and 35 ±0.5°C). Among the examined temperatures, the highest values of net reproductive rate, intrinsic rate of increase, and finite rate of...

Temperature is the main abiotic factor influencing the performance of natural enemies. The effect of temperature on the developmental rate of Phytoseius plumifer (Canestrini & Fanzago), feeding on Tetranychus urticae Koch, was determined at seven constant temperatures of 15, 20, 25, 27, 30, 35 and 37°C. Eggs did not hatch at 10°C and 40°C. Total de...