EFFECT OF COMPLEX APPLICATION OF HERBICIDES DUAL GOLD 960 FUSILAD FORTE 150 WHITH RADOSTIM ON PRODUCTIVITY AND WEED CONTROL OF SUNFLOWER PLANTATIONS

Abstract

The article presents an analysis of the main indices of the efficiency of application of different chemical class herbicides at different rates and methods. The research results, described in the article, were received during the years 2012-2013 while researching the efficiency of herbicide application on the areas under sunflower hybrid Canion which was grown on the black podzolized loamy soil in the conditions of the Right-Bank Forest-Steppe of Ukraine.In the process of measuring weed infestation, the weeds elimination appeared to be insufficient in the variants with the minimal rates of different chemical class herbicides. Under maximum rates the weed elimination was more intensive but the crops were affected negatively having received chemical stress and reduction of their productivity. In 2012 the vegetation period lacked moisture which caused smaller quantity of weeds both in the control variant I and in all other experiment variants.The year 2013 was quite wet which promoted weed growth.The most efficient weed removal was observed under the application of certain herbicides in the variants where Fusilad Forte 150 was applied at the rate of 0,75; 1,0 l/ha. The level of weed infestation was still lower in the variants of combined application of Fusilad Forte 150 c.e. at the rates of 0,5; 0,75; 1,0 l/ha with Radostim at the rate of 20 l/ha when the seeds were treated before sowing them which led to the reduction of the weeds quantity of 87; 93 and 95% as well as 86; 91 and 92%.It is obvious that with pre-sowing treatment of seeds in the variant of combined application of herbicide Fusilad Forte 150 at the recommended rates of 0,5; 0,75; 1,0 l /ha with plant growth regulator Radostim at the rate of 20 ml/ha the negative influence of herbicide agent on the plants was weaker, the conditions of the plants growth and development improved due to anti-stress properties of the biological preparation and inhibition of disease producing factors. Analyzing the dependence of crop yield on the level of weed infestation it was established that in all experiment variants, where herbicides were applied, the indices significantly exceeded the control ones (without herbicides). Among the researched variants with the applied herbicides the crop yield was also higher in the variants with pre-sowing treatment of seeds with Radostim at the rate of 250 ml/t. The highest results were achieved in the variant with the seed pre-sowing treatment and the combined application of Fusilad Forte 150 c.e. at the rate of 0,75 l/ha and Radostim at the rate of 20 ml/ha which was 2,69 t/ha respectively. Similar dependence was observed in 2013.Summarizing the results of the research on the development of the system of sunflower growing with the use of elements of biologization the conclusion was made that the concept of phytocenotic weed control should be the main criterion for practicability of application of different agro-technical measures.The conclusion concerning the improvement of the efficiency of application of herbicides in tank mixture with plant growth regulators on the areas under sunflower was made.