Effects of Salicylic Acid, Harpin and Phosphorus acid in Control of Late Blight (Phytophthora infestans Mont. De Barry) Disease and Some Physiological Parameters of Tomato


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Tosun N. , Aktaş L. , Karabay Yavaşoğlu N. Ü. , Türküsay H.

The Journal of Turkish Phytopathological Society, cilt.32, ss.165-174, 2003 (Diğer Kurumların Hakemli Dergileri)

  • Cilt numarası: 32 Konu: 3
  • Basım Tarihi: 2003
  • Dergi Adı: The Journal of Turkish Phytopathological Society
  • Sayfa Sayıları: ss.165-174

Özet

Bitki aktivattirleri (hastahk direng elisittirleri), salisilik asit (SA) ve Harpinsa (Messenger) tek baglanna ve fungisitle (Agrifos 400) birlikte domates bitkisi yapraklanna uygulanmrg ve ardmdan bitkiler Phytophthora infestans etneni ile inokiile ediknigtir. Ortalama etkililik SA uygulamasnda Vo47 ve llarpinBu uygulamasrnda ise, %55 olarak bulunmugn:r. Yeni geligen iimiwar firngisitlerden biri olan Agrifos 400 ise, konrole giire geg yanrkbk hasmh[r 7o88 oranmda control etni$tir. SA ve Harping, ile fungisit kombinasyonlan tekbaqlanna uygulamadan daha etkili bulunmugtur. Patojen balmut @R) proteinler, kitinaz, p-1,3-glukonaz ve peroksidaz birikimi SA tarafmdan uyanlrken, HarpinBu kitinaz aktivitesinde rinemli bir arhga neden olmam4nr. Salisilik asit ve l{arping" uygulamalan aym zarnanda domateste biiyiime-geligme ile fotosentetik pigment igeriklerinde de pleotopik etkilu giisterrnigtir. Fungisit uygulamast da hastahla dayarukldrk unsurlanm denemede kullandan elisitijrler gibi uyamrrgur. Bu sonuglar, phosphorus asit etkili maddeli Agrifos 400 isimli fungisitin sadece geg yankhk hastal$m ba$anh bigimde conftol eftnekle kalmayp aym zamanda bir bitki attivatiirii oldulunu kantlamalctadn. 

Plant disease resistance elicitffs, salicyclic acid and Harping. alone and in combination with systemic fungicide phosphorus acid (Agrifos 400) were applied to tomato plants, which were inoculated with Phytophthora infestans after heaunents. The average disease reduction was about 47Vo aftq freaunent with SA and 55Vo with Harpinga. One of the newest promising fungicide Agrifos 400 connolled the late blight efficienfly with 887o compare to unfreated ones. The combinations of SA and HarpinEa with fungicide were found much more effective than that of single freatments. While SA induced the accumulation of pathogenesis related proteins (PR Foteins), chitinase, p-1,3-glucanase and peroxidase, Harping" was failed to provide significant increase in chitinase activity. SA and HarpinB. treaunents also exerted pleionopic effects on tomato growth and development and photosynthetic pigment contents. Surprisingly, fungicide application induced the disease resistance components like the elicitors used in our experiment. The results confirmed that Agrifos 400 is not only effective fungicide against late blight but also a plant activator.