Intensity of downy mildew on pea

Abstract

Downy mildew on peas (Peronospora viciae) is a significant pathogen in the production of this plant species. In years favoring the development of this parasite, the agents responsible for downy mildew of ten cause serious damage, resulting inyield reductions of up to 50%. The experiment took place during 2014, in the Institute of Field and Vegetable Crops in Novi Sad. The following three varieties of peas were used for the experiment: Tamis, Dunav and Mali Provansalac. Two reviews focusing on the intensity of downy mildew occurrence were performed during the experiment. The average occurrence of downy mildew on pea leaves during the first check was 5.17%, and during the second check 15.67%. When compared, variety Tamis had the highest infection intensity on the leaf surface, while Mali Provansalac and Dunav varieties showed similar intensity of infection. The results suggest differences in susceptibility to downy mildew among the varieties tested.

Plamenjača (Peronospora viciae (Beck) Caspary) na grašku poslednjih nekoliko godina se pojavljuje kao značajan patogen pri proizvodnji ove povrtarske vrste u našim agroekološkim uslovima. U povoljnim godinama za razvoj parazita, pričinjava ozbiljne štete, koje se manifestuju smanjenjem prinosa i do 50%. Ogled je izveden tokom 2014. godine, na oglednom polju Instituta za ratarstvo i povrtarstvo u Novom Sadu (Rimski Šančevi). U ogledu je uključeno 3 sorte graška: Tamiš, Dunav i Mali provansalac. Tokom ogleda izvedene su dve ocene intenziteta pojave plamenjače. Pojava plamenjače na listu tokom prve ocene iznosila je 5,17%, a tokom druge ocene iznosila je 15,67%. Međusobnim poređenjem sorti, sorta Tamiš je imala najveći intenzitet zaraze na listovima (7,04%; 20,91%), dok je prosečna zastupljenosti zaraze na sortama Mali provansalac (3,66%; 10,66%) i Dunav (4,79%; 9,45%) bila približno jednaka. Dobijeni rezultati ukazuju na razlike u osetljivosti među ispitivanim sortama prema plamenjači.