Ahad - Sahragard

University of Guilan · Department of Plant Protection

Due to the recent entrance of Harmonia axyridis to Iran necessitates elucidating the survival, development, and predation rate of the predator more fully. Therefore, the age-stage, two-sex life table and the stage-specific predation rate models were used to verify its potential as a biological control agent of Aphis gossypii. The life cycle lasted...

The predatory stink bug, Andrallus spinidens Fabricius, is a common natural enemy in Northern paddy fields of Iran. In the current study, life table parameters and consumption rate of A. spinidens fed on Plodia interpunctella Hübner larvae were determined under laboratory conditions. The evaluations were based on age-stage, two sex life table using...

Aphids in urban ecosystems, damage host plants directly by feeding on leaves, sucking up nutrients, and weakenig the host, resulting in yield reduction. The results of a study conducted in 2016 and 2017 on the interactions between population of the rose aphid, Macrosiphum rosae and the parasitoid wasps, Aphidius rosae and Lysiphlebus fabarum indica...

The predatory midge Aphidoletes aphidimyza (Rondani) (Diptera: Cecidomyiidae) is widely used for the control of Aphis spp. in many agricultural systems. We aimed to determine the most suitable host plant for rearing the predatory midges on the prey Aphis gossypii Glover (Hemiptera: Aphididae). Six host plants were selected: cucumber (Cucumis sativu...

Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is one of the most important pests of various agricultural crops with global distribution. Influence of four concentrations of gibberellic acid (GA3) (100, 200, 400, 800 mg/kg diet) on life table parameters of H. armigera was studied at 26 ± 1 °C, 65 ± 5% RH and a photoperiod of 16 L: 8 D h. D...

Different cultivars of plant species can affect the performance of aphids and their natural enemies. In this study, development and life table parameters of the cotton aphid, Aphis gossypii (Hem.: Aphididae) and its predatory midge, Aphidoletes aphidimyza (Dip.: Cecidomyiidae) were determined on four different squash cultivars (Rajaei, Elion, Clari...

Biological control, as a major component of pest management strategies, uses natural biological agents to reduce pest populations. Studying the interaction among Aphis craccivora and its parasitoids including, Lysiphlebus fabarum, Binodoxys acalephae, and Aphidius matricariae in 2016 and 2017 in Tehran Parke-Shahr, showed positive, significant corr...

The present study investigates the effect of gibberellic acid (GA3), a terpenoid and phytohormone, on the digestive physiology and intermediary metabolism of the cotton bollworm Helicoverpa armigera Hübner (Lepidoptera, Noctuidae). Incorporation of GA3 (800 μg g−1 diet) in an artificial diet results in significant reductions in the rates of diet co...

Management of the olive fruit fly using environmentally friendly methods includes strategies based on lure and kill and/or mass trapping to reduce the damage to fruits. The purpose of this study was to evaluate the efficiency of some attractive traps to lure and capture the olive fruit fly. Four treatments and eight replications were conducted in a...

The predacious midge, Aphidoletes aphidimyza (Rondani), is an effective exclusive natural enemy of aphids in greenhouses and field crops. In this study, prey preference of A. aphidimyza was determined using seven treatments including different stages (third-instar nymphs and adults) of two prey species (Aphis gossypii Glover and Myzus persicae (Sul...

Aphis gossypii Glover is considered as the most important polyphagous pest of a wide range of economically important plants in fields and greenhouses. In this study, the demography of cotton aphid, reared on six different host plants, including cucumber (Cucumis sativus L. var. Beith Alpha), tomato (Solanum lycopersicum var. Falat111), eggplant (So...

Glyphodes pyloalis Walker is a serious pest of mulberry trees in Iran. In this study, lethal (LC50 = 19 ppm) and sublethal effects (LC10 = 3.74 andLC30 = 9.77 ppm) of lufenuron were evaluated against 4th instar larvae of G. pyloalis. After treating the larvae at LC30 and LC50 level, most of them died during the molting process and only a few indivi...

Angoumois grain moth, Sitotroga cerealella (Olivier) is one of the most important pests of stored products and known as factitious host for mass rearing of insect natural enemies. Effect of four commercial barely varieties including Fajr 30, Behrokh, Nik and Yousef on life table parameters of S. cerealella was determined at 26 ± 2 °C, 65 ± 5% RH an...

The false chinch bug, Nysius cymoides (Spinola) is a pest of sunflower attacking sunflower fields from their weedy and cultivated hosts. The effect of sunflower and wild mustard (wild host) on the life table parameters of N. cymoides was studied under laboratory conditions (24 ± 1°C, 65 ± 5% RH, a 16:8 h (L:D) photoperiod). Data were analysed based...

Tarsonemus mazandarani sp. nov. (Acari: Tarsonemidae) was collected and identified for first time from tea gardens of Mazandaran province, Iran. This new species was described in the present study.