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- Title
RESEARCHES ON THE COMPORTMENT OF SOME FOREIGN WINTER WHEAT TO THE ATTACK OF THE PATHOGEN DRECHSLERA TRITICI REPENTIS (DIED.) SHOEMAKER.
- Authors
COTUNA, Otilia; SĂRĂȚEANU, Veronica; PARASCHIVU, Mirela; DURĂU, Carmen; MICU, Lavinia
- Abstract
Wheat tan spot produced by Drechslera tritici repentis (Died.) Shoemaker fungus is a foliar disease spread in many areas of the world where wheat is cultivated; having great economic importance due to loses that can be produced at great attack intensities. This pathogen is present in Romania by about 15 years. In Banat region was first reported in 2007, with the suspicion that the fungus was present already before in wheat crops. The harvest loses produced by this pathogen are in direct relationship with the inoculum amount, the resistance of the cultivated variety, with the climatic conditions and with the wheat plants phenophase at the moment of the infections. In 2011 there have been monitored 13 winter wheat varieties, respectively 11 varieties of common wheat (Apache, Kalango, Azimut, Soissons, Renan, Karolinum, Esperia, Bilancia, Centauro, Sagittario and Alcione) and 2 varieties of durum wheat (Normanno and Maestrale). The climatic conditions from the spring of 2011 have influenced positively the pathogeny of Drechslera tritici repentis (Died.) Shoemaker fungus. The virulence of the pathogen was comprised between 45% and 75%. The most sensitive variety from the trial was Apache (control), where the attack intensity was 75%. The attack severity in the Italian varieties was between 48.33% (Esperia) and 66.66% (Normanno and Centauro). The lowest virulence from the trial was registered in the variety Kalango (I% = 45%). Due to the favourable climatic conditions, the infection has been spread to the flag leaf too. The flag leaf was affected in proportion of 15% (Maestrale and Bilancia varieties) and 33.33% (variety Apache). At the moment when the infection reaches the flag leaf the grains are susceptible to the infection. The evolution of Drechslera tritici repentis (Died.) Shoemaker fungus was assessed by the use of AUDPC (area under the disease progress curve). The greatest values of AUDPC have been registered in the varieties Centauro (1370.56), Renan (1359.84), Apache (1333.28), Normanno (1306.56), and the lowest values in the varieties Kalango (917.28), Azimut (954.56) and Esperia (959.84). The values of AUDPC are strongly correlated with the values of intensity registered in the trial field.
- Subjects
WHEAT tan spot; PLANT disease research; WHEAT; PATHOGENIC microorganisms; PLANTS; AGRICULTURAL research
- Publication
Research Journal of Agricultural Science, 2013, Vol 45, Issue 1, p123
- ISSN
2066-1843
- Publication type
Article