A solution for economical and safe wheat protection from parasites

Abstract

Sum of stem length, spike capacity and SAGR transformed values ( 1-5) on May 25 was highly correlated to green leaf area disappearance (GLAD) of the varieties. Treatment at 06.03.2011 was most efficient but obvious followed by fungicide residua, while early one at 05.08.2012 was economically contra effective explained by reduced antagonistic facultative parasites activity. The model for forecasting maximal attack intensity of parasites and grain yield ·losses was adequate in both years for the solution about fungicide treatment rent ability. The economical and safe time for fungicide application were vice versed. Solution was found in !growing varieties with SAGR value below 3 and sum of on GLAD influential factors at least 12.