Impact of tembotrione and flufenacet plus isoxaflutole application timings, rates, and adjuvant type on weeds and yield of maize

Abstract

Due to the steadily increasing cost of weed control in corn (Zea mays L.) and possible negative impact of chemicals on environment the demand for less and more efficient herbicide use is rising. Field studies were carried out in 2010 and 2011 in the Middle-West Poland in order to assessment the effective weed control. Treatments included herbicides tembotrione and flufenacet + isoxaflutole at recommended (88.0 and 36.0 + 7.5 g ha -1 ) and reduced rates (44 and 22 g ha -1 ; 19.2 + 4.0 or 9.6 + 2.0 g ha -1 ) with addition of methylated seed oil (MSO) and ammonium nitrate (AMN) adjuvants. Tembotrione was applied once at the stage of 3-5 maize leaves and flufenacet + isoxaflutole once at pre-emergence of maize. Mixtures of these herbicides were applied sequentially post-emergence, at 16-20-d intervals, after successive weed emergence. Results indicate that herbicide applied at reduced rates with adjuvants provided satisfactory weed control in maize. Application of reduced rates of tembotrione (44 and 22 g ha -1) and especially mixture of tembotrione with flufenacet + isoxaflutole and MSO + AMN adjuvants applied twice provided similar grain yield of maize as from treatments where tembotrione or flufenacet + isoxaflutole herbicides were applied only once at recommended rates (9.5, 9.7, and 10.0 t ha -1 , respectively).

Tank mix application of tembotrione and atrazine to reduce weed growth and increase productivity of maize

“…The treatment tembotrione at 100 g/ha + stefes mero surfactant at 733 g/ha + atrazine 500 g/ha recorded the highest grain yield (4.57 t/ha), which was at par with tembotrione at 80 g/ha + stefes mero at 733 g/ha + atrazine 500 g/ha, tembotrione at 120 g/ha + stefes mero at 733 g/ha + atrazine 500 g/ha and hand weeding at 25 and 40 DAS. This result corroborates with the findings of Singh et al (2012), Idziak and Woznica (2014), Sharma et al (2000), Reddy et al (2000), Deshmukh et al (2009). Higher weed control efficiency in these treatments facilitated better availability of space, light and nutrients resulting in higher values of growth attributes, more number of grains ultimately higher yield.…”

“…Among the herbicidal treatments, the combined application of tembotrione and atrazine registered the highest weed control efficiency (94.4%) at 60 DAS but was very close to that of tembotrione at 100 g/ha + stefes mero at 733 g/ha + atrazine at 500 g/ha, tembotrione at 80 g/ha + stefes mero surfactant at 733 g/ha + atrazine at 500 g/ha. Similar type of results was obtained by Singh et al (2012), Woznica and Idziak (2014).…”

A study on Sorghum bicolor (L.) Moench response to split application of herbicides

“…Th e effi cacy of the split applications was tested and confi rmed by studies on diff erent crops (Kaps and Ondea 1994;Ferreira et al 2000;Lockhart and Howatt 2004;Najafi et al 2013;Idziak and Woźnica 2014). For example, in corn, a reduced dose of tembotrione and its mixture with fl ufenacet + isoxafl utole and adjuvants applied twice provided corn grain yield similar to the herbicides applied once at the labeled rates (Idziak and Woźnica 2014).…”

Effect of Adjuvants and pH Adjuster on the Efficacy of Sulcotrione Herbicide

“…To reduce the cost of intensive herbicide application and environment pollution, and enhance biological effectiveness, methods of weed control should be optimized [23]. Many factors influence the effectiveness of herbicides.…”