Control of annual broadleaf weeds by combinations of herbicides in sugar beet

Abstract

Sugar beet is a poor competitor to weeds. Weeds are a major constraint to sugar beet productivity. Field experiments were conducted at Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry (55º23′ N, 23º51′ E) during the period 2010-2012 on a loamy Endocalcari-Epihypogleyic Cambisol (CMg-p-w-can) to determine the influence of tank-mixed herbicides phenmedipham + desmedipham + ethofumesate (136.5 + 106.5 + 168 g ha -1 a.i.) with chloridazon (624 g ha -1 a.i.), metamitron (700 g ha -1 a.i.) and triflusulfuron (3.75 g ha -1 a.i.) on broad leaf weeds. Phenmedipham + desmedipham + ethofumesate was applied at three doses, 1/1, 2/3 and 1/2 of the recommended dose. Metamitron was applied at two doses, 1/1 and 1/2 of the recommended dose. All herbicide combinations acted similarly in reducing these weed species: Chenopodium album, Thlaspi arvense, Tripleurospermum perforatum, Polygonum aviculare, Viola arvensis, Veronica arvensis, Lamium purpureum, Capsella bursa-pastoris and Euphorbia helioscopia. The efficacy of phenmedipham + desmedipham + ethofumesate at full (1/1) dose was similar to that applied in a tank mix with chloridazon, metamitron and triflusulfuron at full dose. There were no significant differences in weed weight. Having reduced the dose of phenmedipham + desmedipham + ethofumesate by 33% and 50% in a tank mix, the dry weight of C. album, T. perforatum and P. aviculare increased not significantly. The addition of chloridazon, metamitron and triflusulfuron at full dose had a similar impact on weeds. The action of triflusulfuron was longer because the weight of dominant weeds (C. album and T. perforatum) decreased (6-37%) during all crop growing period. Reducing the dose of metamitron from 525 to 350 g ha -1 a.i. (33%) in a tank mix with phenmedipfam + desmedipham + ethofumesate at 1/2 dose, the dry weight of C. album, T. perforatum, P. aviculare, V. arvensis and C. bursa-pastoris increased not significantly. By reducing the dose of herbicides in a tank mix, the number of active ingredients (a.i.) should be increased.

Effect of different single herbicide doses on sugar beet yield, quality and associated weeds

“…Also, he added that the total broadleaf and total broadleaf and grassy weeds were significantly reduced by 54 and 91%, respectively, compared to untreated check in the second season. Our findings are consistent with those obtained by Attia et al (2011), Vasel et al (2012), Wujek et al (2012) and Deveikte et al (2015).…”

COMPARATIVE EFFICACY OF DIFFERENT HERBICIDES FOR WEED MANAGEMENT IN LENTIL (Lens culinaris L.)

“…The cultivar Punjab Masoor-2020 performed appreciably well with maximum SDW (5.02 g) while cultivar Punjab Masoor-2009 remained at lowest ranking with minimum SDW (4.62 g). In the current study, herbicide application and manual weed management lower weed growth, ensuring wider reliability of inputs and resources for lentil plants and, as an outcome, a substantial increase in shoot plant biomass.These findings are consistent with the findings of Wujek et al (2012) and Deveikte et al (2015), who found that herbicides lowered weed crop competition and leads to a significant increment in plant biomass.…”

“…All the herbicides and manual weeding reduced the weeds growth which in turn ensured the better availability of inputs and resources for plants and therefore, resulted in substantial increase in root fresh and dry biomass production. These results are comparable with outcomes of Wujek et al, (2012) and Deveikte et al,(2015) they also noted that herbicides reduced the weed crop competition and resulted in significant increase in the biomass production.…”

Effect of Multifunctional Adjuvants on Physical and Chemical Features of Spray Liquid and Efficacy in Sugar Beet

“…Effective weed control is particularly important for widely spaced crops, where postemergence dicotyledonous weed control is mainly based on the use of substances such as ethofumesate, phenmedipham, metamitron or chloridazon, clopyralid, and triflusulfuronmethyl [13]. Considering both external factors and herbicide formulations, selecting the right adjuvant is difficult, especially for a single-component adjuvant.…”