The Monitoring of the Phytosanitary Status on the Plum Tree Plantations from Reghin Area

Abstract

The plum tree is a fruit tree with fruits that have a very complex content of nutrients many of them still undetermined. In the Reghin area and in Romania this fruit has a significant importance in both industrial units and in smaller households. The present paper has as main purpose the monitoring of the plum plantations and evaluation of frequency (F%), intensity (I%) and the degree of attack (GA%) of the main pathogens observed at that time (2012) in different plantations from Reghin area. The monitoring took place on four plantations with different surfaces by visually estimating four varieties of plum trees De Bistrita, Stanley, Anna Spath and Silvia, with different percentage in the plantations. The symptoms followed on the plum trees were viral symptoms (mottling on the leaves), red spots (caused by Polystigma rubrum) and shot-hole bacterial symptoms (produced by Pseudomonas campestris pv. Plum or Pseudomonas syringae pv. Morsprumorum). These symptoms are very common and damaging in Reghin area, often exceeding the economic damage threshold.