نتایج جستجو برای: spodoptera exigua
تعداد نتایج: 4042 فیلتر نتایج به سال:
Camptothecin (CPT), a plant alkaloid originally isolated from the native Chinese tree, Camptotheca acuminate, exerts the toxic effect by targeting eukaryotic DNA topoisomerase 1 (DNA Topo1). Besides as potent anti-cancer agents, CPT and its derivatives are now being explored as potential pesticides for insect control. In this study, we assessed their toxicity to an insect homolog, the Topo1 pro...
Many researchers investigating plant-insect interactions maintain their insect colonies on artificial diet and assume that salivary enzymes and elicitors remain representative of natural situations. These salivary elicitors, such as the enzyme glucose oxidase (GOX), play important roles in influencing plant defense responses. In fact, GOX has been implicated in suppressing induced nicotine-prod...
کرم برگخوار چغندر، (Spodoptera exigua (Hübner، حشرهای با دامنهی میزبانی وسیع است که خسارت عمدهای را بهخصوص به چغندر، سیبزمینی و پنبه وارد میسازد. به منظور درک بهتر چگونگی زمستانگذرانی آفت، ترکیبات ضد یخ (cryoprotectants) لاروهای زمستانگذران طی ماه های آبان تا اسفند 1387 به همراه نمونههای پرورشیافته در آزمایشگاه با HPLC اندازهگیری شد. پنج ترکیب تریهالوز، گلوکز، مایواینوزیتول، گلیسرو...
برای تعیین گونههای پروانه های برگخوار مزارع چغندرقند اصفهان، نمونهگیری لارو یا شفیره بالپولکداران به صورت ماهانه یا دو هفته یکبار از خاک و یابرگ چغندرقند درشهر ابریشم استان اصفهان طی سال 1393انجام شد. نمونهها به آزمایشگاه منتقل شدند و پس از پرورش و ظهور بالغین و شناسایی مورفولوژیکی، DNA آنها استخراج شد. پس از تکثیر بخشی از ژن سیتوکروم اکسیداز یک توسط جفت آغازگر Lep- F/R، محصول PCR جهت تعیین...
Abstract This study aims to determine the influence of three types beneficial fungi with various concentration application on shallot production and pest attacks. research was carried out at Plant Disease Laboratory Teaching Farm, Faculty Agriculture, Hasanuddin University, from September November 2022. arranged in a split plot design. The main plots are fungi, namely Trichoderma asperellum, Be...
The phytohormone jasmonic acid (JA) is known to mediate herbivore resistance, while salicylic acid (SA) and non-expressor of PR-1 (NPR1) mediate pathogen resistance in many plants. Herbivore attack on Nicotiana attenuata elicits increases in JA and JA-mediated defenses, but also increases SA levels and Na-NPR1 transcripts from the plant's single genomic copy. SA treatment of wild-type plants in...
Tropical dry forests (TDFs) have been widely transformed by human activities worldwide and the ecosystem services they provide are diminishing. There has been an urgent call for conservation and restoration of the degraded lands previously occupied by TDFs. Restoration experiences aim to recover species diversity and ecological functions. Different restoration strategies have been used to maxim...
The beet armyworm (Spodoptera exigua Hübner) is an important pest of many agricultural crops all over the world. Most of the sugar beet growing regions in Iran are infested. In this study, the acute lethal effects of Pyriproxyfen, Spinosad, and Indoxacarb as well as sublethal effects of Pyriproxyfen on the 1 instar S. exigua were assessed by leaf dip bioassay method. Mortality was recorded 48 h...
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