Pathogenicity of Alternaria Species Isolated from Chamaecyparis lawsonia In Vitro

محورهای موضوعی : مجله گیاهان زینتی

Mohammad Reza Safari Motlagh ¹ , Fatemeh Ramezani Rad ² , Shahram Sedaghathoor ³

1 - Department of Plant Pathology, Faculty of Agriculture, Rasht Branch, Islamic Azad University, Rasht, Guilan Province, PO box 41335-3516, Iran
2 - Master of Horticulture, Rasht Branch, Islamic Azad University, Rasht, Iran
3 - Department of Horticulture, Faculty of Agriculture, Rasht Branch, Islamic Azad University, Rasht, Iran

تاریخ دریافت : 1393/12/20 تاریخ پذیرش : 1394/05/20 تاریخ انتشار : 1394/06/28

کلید واژه: Fungi, pathogenicity, Alternaria spp, Chamaecyparis lawsonia,

چکیده مقاله :

Chamaecyparis lawsonia, which brings beauty in parks and green space,is attacked by a variety of pathogenic agents specially fungi. In this study, someChamaecyparis lawsonia available in parks that had disease symptoms were sampled. After sample collection, in order to isolate fungal pathogens, cuts ofthe infected plant tissues were placed on PDA (potato dextrose agar) and laterwere put on WA (water agar) for identifying. Then test of pathogenicity of theseisolates on Chamaecyparis lawsonia was done inside the box with plasticstopper. To do this, cuts of colonies of 4 day fungi obtained on PDA mediumwere put on leaves. The final evaluation was performed after 10 days. This experimentwas performed in a completely randomized design with 3 replicationsand 7 treatments. The results showed that isolated fungi are in 2 groups asfollowing: Alternaria franseriae and Alternaria tenuissima. According to theresults, both species were pathogenic on host. Totally, A. franseriae showedmore disease severity compared to A. tenuissima on C. lawsonia.

چکیده انگلیسی:

یکی Tetranychus urticae Koch (Acari: Tetranychidae( کنه دو نقطه ایاز آفات مهم اقتصادی گیاهان زینتی در ایران می باشد. فراوانی جمعیت و توزیعHot و Maroussia، Wendela، Elderado، Wenedetta فضایی پنج رقم رز شاملدر طول دو فصل رشد در سال های 1390 و 1391 در گلخانه رز پاکدشت تهران Ladyشاخص پراکندگی، میانگین تراکم لیود، شاخص موریسیتا و ،k مطالعه شد. پارامتربرای تخمین الگوی توزیع فضایی بکار برده شد. )Iwao و Taylor( روش های رگرسیونو ضرایب مدل های رگرسیون وجود k برنامه های اصلاحی نمونه برداری توسط پارامتر2 در / اوایل تیر ) 47 T. urticae داشت. نتایج نشان داد که بیشترین تراکم جمعیتی4 در هر برگ( بودند. هم چنین یک برنامه نمونه برداری / هر برگ( و اوایل شهریور ) 11دنباله ای بصورت گسترده با استفاده از مدل گرین برای تخمین تراکم کنه استفادهدر اکثر فصل رشد بصورت ،Maroussia شد. جمعیت روی ارقام مختلف رز به ویژهتجمعی بود و مدل های دو جمله ای منفی مجموعه داده ها را بهتر از مدل پویسونتطبیق دادند. میانگین تعداد کنه دو نقطه ای در هر گیاه بین قسمت های مختلف آننشان داد گرایش کمی Maroussia اختلاف معنی داری داشت. درصد تطبیق رقم رز14 درصد از مجموعه داده های / به سمت مدل پویسون هم دارد. هم چنین 58 و 1تطبیق بیشتری با توزیع پویسون داشت. این Wenedetta بر روی رقم T. urticaeنتایج بطور کامل یافته های شاخص پراکنش را تأیید می کند و نشان دهنده توزیعتجمعی است. تعیین برنامه نمونه برداری و الگوی توزیع فضایی آفت بر روی طراحیو اجرای مدیریت تلفیقی آفت می تواند اثرگذار باشد

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