نتایج جستجو برای: horizontal transfer was observed when infected and uninfected parasitoids larvae shared the same host egg

تعداد نتایج: 21259862  

Journal: :کنترل بیولوژیک آفات و بیماری های گیاهی 0
حسین کیشانی فراهانی دانشجوی دکتری حشره شناسی گروه گیاهپزشکی پردیس کشاورزی و منابع طبیعی دانشگاه تهران احمد عاشوری استاد بخش حشره شناسی گروه گیاه پزشکی پردیس کشاورزی و منابع طبیعی دانشگاه تهران سید حسین گلدانساز دانشیار بخش حشره شناسی گروه گیاهپزشکی پردیس کشاورزی و منابع طبیعی دانشگاه تهران مارتین شاپیرو دانشیار بخش رفتارشناسی دانشگاه کالیفرنیا اکبر گلشنی دانشجوی کارشناسی گروه گیاهپزشکی پردیس کشاورزی و منابع طبیعی دانشگاه تهران پوریا آبرون دانشجوی کارشناسی ارشد گروه گیاهپزشکی پردیس کشاورزی و منابع طبیعی دانشگاه تهران

learning host or prey-related olfactory cues may lead to increase efficiency and foraging capacity of biocontrol agents such as trichogramma egg parasitoid wasps in nature. the egg parasitoids, trichogramma species (hym., chalcidoidea, trichogrammatidae), are most commonly and important biocontrol agents that have successfully been utilized against several lepidopteran pests, especially through...

طالبی , علی اصغر , فتحی پور, یعقوب , کاظمی, فاطمه ,

The biological and behavioural parameters of Anisopteromalus calandrae (Hym.: Pteromalidae), a parasitoid of Callosobruchus maculatus (Col.: Bruchidae) on Chickpea were studied in laboratory conditions at temperature of 25±1ºC, photoperiod 16:8 (L:D) and 20±5 % RH. The pre-adult period of the wasp was 19.82 ± 0.038 days and pre-ovipositional period in this wasp was so short that female laid egg...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ادبیات و زبانهای خارجی 1391

abstract: postmethod is a newly developed pedagogy which as an alternative to method rejects the notion of good or bad methods and the concept of best method that can be generalized and appropriate for all contexts. instead, it treats each context as unique and one of a kind which cant be compared with other cases. this study is a postmethod-oriented one which investigates whether and how far t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه پلیمر و پتروشیمی ایران - پژوهشکده پتروشیمی 1389

this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

Journal: :Journal of invertebrate pathology 2002
Theodore G Andreadis

The epizootiology, transmission dynamics and survival strategies employed by the microsporidium Hyalinocysta chapmani were examined in field populations of its primary mosquito host, Culiseta melanura and its intermediate copepod host, Orthocyclops modestus over a three-year period in an aquatic subterranean habitat. H. chapmani was enzootic and was maintained in a continuous cycle of horizonta...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده علوم انسانی 1390

iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1390

learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...

2014
Ezio Peri Antonino Cusumano Valentina Amodeo Eric Wajnberg Stefano Colazza

Research on interspecific competitive interactions among insect parasitoids has often been characterized by laboratory studies in which host insects are exposed to female parasitoids of different species in various sequences and combinations. In the last years, an increasing number of studies have investigated interspecific interactions under field and semi-field conditions although just a few ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1389

this study was conducted to investigate the impact of portfolio assessment as a process-oriented assessment mechanism on iranian efl students’ english writing and its subskills of focus, elaboration, organization, conventions, and vocabulary. out of ninety juniors majoring in english literature and translation at the university of isfahan, sixty one of them who were at the same level of writing...

2011
Rajinder S. Mann Kirsten Pelz-Stelinski Sara L. Hermann Siddharth Tiwari Lukasz L. Stelinski

Candidatus Liberibacter asiaticus is a fastidious, phloem-inhabiting, gram-negative bacterium transmitted by Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae). The bacterium is the presumed causal agent of huanglongbing (HLB), one of the most destructive and economically important diseases of citrus. We investigated whether Las is transmitted between infected and uninfected...

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