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Mohammadpour M.,Vali e Asr University of Rafsanjan | Jalali M.A.,Vali e Asr University of Rafsanjan | Michaud J.P.,Kansas State University | Ziaaddini M.,Vali e Asr University of Rafsanjan | Hashemirad H.,Pistachio Research Institute of Iran
BioControl | Year: 2014

Females of Trissolcus agriope (Platygastridae) avoid host (Brachynema signatum) eggs parasitized by conspecifics or Ooencyrtus pityocampae (Encyrtidae), but females of the latter species will superparasitize and multiparasitize, although they mostly attack unparasitized eggs. Females of T. agriope were more efficient in the laboratory and parasitized more hosts in 24 and 48 h. In multiparasitized hosts, O. pityocampae was a superior larval competitor and could complete also development as a facultative hyperparasitoid. When females of both species foraged together, T. agriope parasitized significantly more than O. pityocampae, about 50 % in both cases, although O. pityocampae almost doubled its parasitism rate as the exposure period was lengthened from 24 to 48 h. When O. pityocampae followed T. agriope in sequential foraging bouts, the former species successfully parasitized more hosts than the latter. The advisability of co-releases of both species to improve biological control of first generation B. signatum in Iranian pistachio orchards is discussed. © 2014 International Organization for Biological Control (IOBC). Source

Mohammadpour M.,Vali e Asr University of Rafsanjan | Ziaaddini M.,Vali e Asr University of Rafsanjan | Jalali M.A.,Vali e Asr University of Rafsanjan | Hashemirad H.,Pistachio Research Institute of Iran | Mohammadi-Khoramabadi A.,Shiraz University
Zoology and Ecology | Year: 2016

Egg parasitoids of the pistachio stink bug, Brachynema germari (Hemiptera: Pentatomidae) were collected in pistachio orchards in Kerman province, Iran using rearing and egg-trap methods. The rearing of egg parasitoids confirmed the presence of two families, Scelionidae (Hymenoptera: Proctotrupoidea) and Encyrtidae (Hymenoptera: Chalcidoidea). In total, seven species representing two genera of the family Scelionidae (Psix and Trissolcus) and two species belonging to the genus Ooencyrtus of the family Encyrtidae were collected and identified. Four species of them, i.e. T. deserticola, T. niceppe, T. oobius and O. egeria, are newly recorded from Iran. Seven new host-parasitoid associations were determined. An identification key to these species is provided. © 2016 Nature Research Centre. Source

Sajjadinia A.,Vali e Asr University | Bazargan H.,Vali e Asr University | Hokmabadi H.,Pistachio Research Institute of Iran | Kefayati M.E.,University of Tehran | Rajaee S.,Birjand University
Acta Horticulturae | Year: 2011

Regarding the presence of calcareous soils with high pH and EC in pistachio production areas in Iran, mineral nutrient absorption by plants becomes difficult and consequently nutrient deficiency is common. In order to increase the efficiency of chemical fertilizers in arid areas, and increase the quantity, quality and biological value of yield, foliar application of chemical fertilizers is the priority. Thus, in the present experiment, complete fertilizer, potassium, calcium, iron and copper in different concentrations and combinations were used to investigate their effects on pistachio fruit quality. Mean comparison of data showed that percentage of small, semi kernel, blank and none splitting fruits, and pistachios/ounce was improved by all foliar applications of fertilizer. The lowest percent of small nut and blank nut was observed in calcium and commercial complete micro-nutrient solution (2 g L -1) and iron & copper (1 g L -1) treatments respectively. Pistachio fruits/ounce was improved by iron and copper treatments. Thus, it is concluded that foliar application of fertilizers increase fruit quality in pistachio trees 'Ouhadi'. Source

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