Sudan Grass Sensitivity to Some Herbicides. I. Selectivity

Abstract

During the period 2008 – 2010 in the experimental field of the Institute of Forage Crops, Pleven is displayed three factorial field experiment in non irrigated conditions. Studied is the selectivity of five two components herbicide for soil application (Suksesor T, Merlin Flexx 480 SC, Click Plus, Click Сombi and Kamiks 560 CE) in five varieties Sudan grass (Voronejskaya 9, Vercors, Kazitachi, Piper and True) in three doses (50, 100 and 150%) of the dose of the product recorded by the manufacturer. Detected specific varietal response to feld germination and survival according to the type and dose of herbicide applications. Vercors and Kazitachi varieties and can be used as components in future breeding programs due to the relatively low sensitivity to herbicides. Suksesor T is selective for Sudan grass variety Voronejskaya 9 at a dose of 400 ml/da. Click Plus at a dose of 300 ml/da has relatively good selectivity and can be applied only varieties Vercors and Kazitachi. Kamiks 560 at a dose of 300 ml/da has good selectivity in Sudan grass variety Vercors. Application of Merlin Flexx 480 SC Sudan grass induces strong phytotoxicity (score 8-9) which leads to death of all tested varieties.