Antifungal and Herbicidal Activity of Trachystemon orientalis (L.) G. Don against Some Plant Pathogenic Fungi and Cuscuta campestris Yunck

Abstract

The antifungal and herbicidal activity of Trachystemon orientalis (L.) G. Don aqueous plant extracts

were evaluated against important plant pathogenic fungi (Sclerotinia sclerotiorum Lib. De Bary, Alternaria solani

(Ellis & G. Martin) Sorauer, Phytophthora infestans (Mont.) de Bary, and Botrytis cinerea Pers.,) and Cuscuta

campestris Yunck. Antifungal activity experiments were conducted under laboratory conditions and herbicidal

activity was tested in the greenhouses. The leaves, root and flowers of aqueous extracts of T. orientalis at 1, 3,

5, 7, 10 and 20% doses were applied on Potato Dextrose Agar (PDA) and tested to plant diseases, and the dose

of 5% of flowers and leaves aqueous extracts of T. orientalis were examined on tobacco (Nicotiana tabacum L.)

and sugar beet (Beta vulgaris L.) against C. campestris. Antifungal activity displayed differences inhibited effects

on mycelium growth of plant pathogenic fungi according to increasing extract dose and plant pathogenic fungi.

The results showed that mycelial growth inhibitions were found effective in all extracts (leaf, flower and root) on S.

sclerotiorum 0 to 100%, on A. solani 21 to 100%, on P. infestans 25 to 100% and, on B. cinerea 0 to 100% depending

on the extract dose. According to herbicidal activity result the development of C. campestris has been reduced by

looking the fresh (in tabocco: 0.3639 g and in sugar beet:0.6749 g) and dry (leaf extracts: in tabacco:0.0675 g and

sugar beet: 0.1546 g; flower extracts: in tobacco 0.3246 g and sugar beet: 0.3421g) weight.

Keywords

• Antifungal activity,Cuscuta campestris,herbicidal activity,plant extract,Trachystemon orientalis

Bazı Bitki Patojeni Funguslar ve Cuscuta campestris Yunck.’a Karşı Trachystemon orientalis (L.) G. Don’un Antifungal ve Herbisidal Aktivitesi

Abstract

Trachystemon orientalis (L.) G. Don bitkisinin su ekstraktlarının bitki patojeni funguslara (Sclerotinia

sclerotiorum Lib. De Bary, Alternaria solani (Ellis& G. Martin) Sorauer, Phytophthora infestans (Mont.) de Bary,

ve Botrytis cinerea Pers.,) ve Cuscuta campestris Yunck. karşı antifungal ve herbisidal aktiviteleri belirlenmiştir.

Antifungal aktivite denemeleri laboratuvar koşullarında, herbisit etkinlik denemeleri ise sera koşullarında

yürütülmüştür. T. orientalis’in %1, 3, 5, 7, 10 ve 20 dozundaki yaprak, kök ve çiçek ekstraklarının bitki patojenlerine

karşı Patates Dekstroz Agar (PDA) ortamı üzerinde antifungal aktivite çalışmaları yürütülmüştür. Herbisidal

aktivite çalışmalarında ise, C. campestris’e karşı T. orientalis’in çiçek ve yaprak ekstraktlarının %5 dozları tütün

(Nicotiana tabacum L.) ve şeker pancarı (Beta vulgaris L.) bitkileri üzerinde uygulanmıştır. Bitki patojeni funguslar

ve ekstraktların doz artışına göre antifungal aktivitelerde farklılıklar gözlemlenmiştir. Bu sonuçlara göre, ekstraktın

doz miktarına bağlı olarak bütün ekstraktlar için (yaprak, çiçek ve kök) S. sclerotiorum’da %0-100, A. solani’de

%21-100, P. infestans’da %25-100 ve B. cinerea’da %0-100 arasında yüzde miselyum gelişim engellemeleri

gözlenmiştir. Herbisidal aktivite çalışmaları sonucunda, C. campestris’in kontrol bitkilerine göre taze (tütünde;

0.3639 g ve şeker pancarında; 0.6749 g) ve kuru (yaprak ekstraktı:tütünde 0.0675 g ve şeker pancarında: 0.1546 g;

çiçek ekstraktı: tütünde 0.3246 g ve şeker pancarında: 0.3421g) ağırlıklarına bakılarak gelişimini azalttığı ortaya

konmuştur.

Keywords

• Antifungal aktivite,bitki ekstraktı,Cuscuta campestris,herbisidal aktivite,Trachystemon orientalis

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