اثر تدخینی عصاره هگزانی سه گونه اکالیپتوس(microtheca Eucalyptus ،E. globules و E. camaldulensis) برشپشه دندانه‌دار Oryzaephilus surinamensis (Coleoptera: Silvanidae)

محورهای موضوعی : گیاه پزشکی

مونا فلاحی ¹ ( )
احمد حیدری ² ( )
سعید محرمی پور ³ ( )
سهراب ایمانی ⁴ ( )
عارف معروف ⁵ ( )

تاریخ دریافت : 1390/10/17 تاریخ پذیرش : 1392/05/26 تاریخ انتشار : 1392/06/01

کلید واژه: اکالیپتوس, fumigant toxicity, Eucalyptus, شپشه دندانه دار, عصاره هگزانی, اثر تدخینی, Hexane Extract, Saw toothed grain beetle,

چکیده مقاله :

مشکلات ناشی از مصرف آفت کش های شیمیایی و مصنوعی بر محیط زیست و انسان موجب گرایش به استفاده از آفت کش هایی با منشاء گیاهی و طبیعی برای کنترل آفات شده است. گیاه اکالیپتوس با دارا بودن خواص آفت کشی به عنوان یک گیاه بالقوه می‌تواند بدین منظور مورد مطالعه قرار گیرد. در این تحقیق اثر کشندگی عصاره هگزانی سه گونه اکالیپتوسEucalyptus globules ، E. microthecaو E. camaldulensis روی مراحل مختلف رشدی شپشه دندانه دارOryzaephilus surinamensis مورد بررسی قرار گرفت .در این آزمایش لارو و حشره کامل به مدت 24 ساعت در دمای 1 ± 28 درجه سلسیوس و رطوبت نسبی 5 ± 65 درصد در معرض عصاره هگزانی اکالیپتوس قرار گرفتند و پس از محاسبه تلفات، مقادیر LC50 و LC90 محاسبه گردید. مقادیر LC50 عصاره هگزانی سه گونه اکالیپتوسE. microtheca ، E. globulesو E. camaldulensisبه ترتیب 1507 و 1552 و1608 میکرولیتر بر لیتر هوا برای مرحله حشره کامل و 2078 و 2172 و 2229 میکرولیتر بر لیتر هوا برای لارو برآورد گردید. بر اساس مقادیر به دست آمده، حشرات کامل نسبت به لاروها به عصاره هگزانی اکالیپتوس حساس‌تر بودند.

چکیده انگلیسی:

Due to chemical and synthetic pesticides hazards on the environment and the human health, trend to using botanical and natural pesticides increased. Eucalyptus plant as a potential plant for pest control can be studied for this purpose. This experiment was conducted to investigate the insecticidal effects of hexane extract of three species eucalyptus (Eucalyptus globules, E. microtheca & E. camaldulensis) on different developmental stages of Saw-toothed grain beetle (Oryzaphilus surinamensis) In this experiment larvae and adult were exposed to eucalyptus hexane extract for 24 hours under laboratory conditions 28±10C, 65±5% RH. LC50 values of three Eucalyptus hexane extract (E. microtheca, E. globules, E. camaldulensis) were estimated 1507, 1552, 1608 µl/l air and 2078,2172,2229 µl/l air for adult and larval stage respectively. According to values calculated, the adults insect were more susceptible than larval stage to eucalyptus hexane extract.

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