The Effectiveness of a Tank Mix of a Herbicide that Inhibits Hydroxylphenyl Pyruvate Dioxygenase (HPPD) for Controlling a Variety of Weed Flora in Maize in Tamil Nadu Western Zone
Author : Dr. SVR Shetty, Dr. AN Rao, Kamal Singh and Priya Gupta
Abstract :
Weeds' competition with maize for nutrients, moisture, and light interference is very likely to result in maize being damaged. In order to control weeds in maize, atrazine was the main tool at hand. Although it is a pre-emergence herbicide, it effectively controls some annual grasses and broad-leaved weeds; however, maize crops require some post-emergence herbicides to control complex weed flora. There are few herbicide mixtures that are approved for use on maize. Therefore, details about the sensitivity to POST tembotrione herbicide and PRE emergence atrazine in rabi maize are required. The goals of this experiment were to assess tembotrione 420 SC (Laudis)'s compatibility with maize and the impact of that compound's leftovers on a subsequent crop. To determine the compatibility of tembotrione 420 SC at 120 g a.i.ha-1 as its combination with surfactant isoxadifen-ethyl, atrazine, and 2,4-D Dimethyl amine salt as tank mix on the grain yield of maize, a field experiment was conducted over two consecutive years in the rabi season of 2015–16 and 2016–17. As compared to the application of POE tembotrione 420 SC at 120 g a.i.ha-1 + surfactant at 1000 ml + atrazine 50% WP at 500 g a.i.ha-1, individual herbicides and unsprayed control, the combination significantly reduced weed density and biomass of grasses and broad-leaved weeds. The predominant grassy and broad-leaved weeds were greatly reduced by it: In comparison to the other herbicidal treatments, Dactyloctenium aegyptium (L.) Willd., Panicum repens (L.), Cyperus rotundus (L.), Trianthema portulacastrum (L.), and Cleome gynandra (L.) were all effective. Finally, the compatibility of tembotrione 420 SC at 120 g a.i.ha-1, surfactant at 1000 ml, and atrazine 50% WP at 500 g a.i.ha-1 at 20 and 40 DAHS can maintain the total weed density and dry weight reasonably at lower levels and increase the productivity of rabi maize without causing any phyto-toxicity to the primary crop as well as the succeeding sunflower.
Keywords :
2, 4-D, isoxadifen-ethyl, atrazine, phytotoxicity, HPPD inhibitor, grain yield
