Localization of Trichoconiella padwickii in the Different Components of Rice Grain

The results of a phytosanitary survey of rice seeds in the province of Corrientes (Argentina) confirmed that Trichoconiella padwickii (Ganguly) Jain was present in 100% of the seeds samples analyzed, with values that reached 75% of the incidence. The localization of a pathogen in the different components of the seed provides valuable information for studies on transmission from seeds to seedlings and on the type of treatment to control the pathogen. The aim of the present work was to find out the localization of T. padwickii in the different components of rice seeds of the varieties BR-IRGA 424, Puitá INTA CL, Supremo 13 and Taim. Whole seeds were dissected in: palea, lemma, sterile lemmas and grain, and the incidence of the pathogen determined both in the whole seed and in each of the components. Then were incubated in Petri dishes with bean agar for 8-10 days. The results obtained show that the pathogen was present in all the components of the varieties analyzed, although mainly in the most internal components (endosperm and pericarp).

کلیدواژه ها:

Oryza sativa ، Seed pathogen ، Inoculum