Adjuvants to Improve Phenmedipham + Desmedipham + Ethofumesate Efficacy Against Weeds in Sugar Beet (Beta vulgaris)

E Izadi-Darbandi,A Aliverdi,M Anabestani,A Shamsabadi

doi:10.1590/s0100-83582019370100021

E Izadi-Darbandi, A Aliverdi + Show 2 more

Open Access

https://doi.org/10.1590/s0100-83582019370100021

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Abstract

ABSTRACT: The efficacy of reduced (411.5 and 617.2 a.i. ha-1) and recommended (823.0 g a.i. ha-1) rates of phenmedipham + desmedipham + ethofumesate on the control of Amaranthus retroflexus, Amaranthus blitoides, Chenopodium album, and Tribulus terrestris in sugar beet field was investigated when they were tank-mixed with and without Adigor (0.5% v/v), Ammonium sulphate (2% v/v), Citogate (0.2% v/v), D-Octil (0.3% v/v), Hydro-Max (0.5% v/v), and Volck (0.5% v/v). When the herbicide was applied alone, there was no significant difference between the rates of 617.2 and 823.0 g a.i. ha-1 for reduction of total weed density and biomass. Significantly, the adjuvants decreased total weed density and biomass. However, there was no significant difference among the performance of adjuvants. The sugar beet root and sucrose yields were increased significantly by increasing herbicide rate as a result of an improvement in weed control. Although herbicide efficacy was influenced in a similar manner by all the adjuvants, the best results were found as follows: root yield was increased up to 9.66% (71.31 Mg ha-1) by applying the recommended rate of phenmedipham + desmedipham + ethofumesate plus Adigor compared to weed-free check (64.68 Mg ha-1) whereas sucrose yield was increased up to 26.48% (13.21 t ha-1) by applying the recommended rate of phenmedipham + desmedipham + ethofumesate plus HydroMax compared to weed-free check (10.45 t ha-1). From an economic and ecological standpoint, these two adjuvants can be suggested to optimize the recommended rate of phenmedipham + desmedipham + ethofumesate in weed management.

Highlights

It is an undisputed fact that food production tends to increase arithmetically while population growth tends to increase geometrically
Sugar beet (Beta vulgaris L.) is a herbaceous biennial plant which belongs to the family Chenopodiaceae
There was a significant difference among the herbicide rates for reduction of weed density and biomass at 3 and 5 weeks after treatment (WAT) (Tables 2 and 3) except for biomass of C. album and density of T. terrestris at 3 WAT (Table 2)

Summary

Introduction

It is an undisputed fact that food production tends to increase arithmetically while population growth tends to increase geometrically. Food production can be increased by intensive farming; it has high hidden costs (Anderson and Gugerty, 2010). In these agricultural systems, light, water, and fertilizer-use efficiency of a crop can be influenced when other plants are grown in the vicinity. Sugar beet (Beta vulgaris L.) is a herbaceous biennial plant which belongs to the family Chenopodiaceae. During 2010-2015, annual cultivation area of sugar beet in Iran was approximately 100,000 ha yr-1 to take 600,000 Mg sugar yr-1. This is an average yield of 51 Mg root ha-1. This is an average yield of 51 Mg root ha-1. (ISFS, 2016)

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