Efficacy evaluation of tribenuron methyl herbicide by using different adjuvants for common lambsquarters (Chenopodium album L.) control

Abstract

Environmental risks resulting from the increasing application of chemical herbicides have raised many concerns about human health and the safety of agro ecosystems and environment. Hence, it is very important to find practical and effective methods for reducing the use of pesticides in environment as well as the increasing the efficiency of these compounds. Addition of adjuvants to spray solutions could be considered as one of these methods. Greenhouse studies were conducted using a complete randomized design with a factorial arrangement during 2015-2016 to evaluate the impact of different adjuvants (citogate, canola oil, and castor oil) at concentrations of 0.1 and 0.2 (%v/v) with 5, 10, 20, 30 and 40 g a.i. ha -1 of tribenuron methyl herbicide to control common lambsquarters. Results showed that all applied adjuvants enhanced the efficacy of tribenuron methyl in decreasing the biomass of common lambsquarters. Efficacy of this herbicide increased with enhancing its concentrations. The required dose of herbicide to give 50 per cent common lambsquarters control (ED50) for no adjuvant, citogate, castor oil, and canola oil application (0.2 (%v/v)) was 21.24, 11.48, 11.65, and 11.81 g a.i. ha -1 , respectively. Totally the application of citogate and canola oil had the highest and the lowest impact on tribenuron methyl performance to control of common lambsquarters respectively. Also, the Relative Potency values were significantly increased when adjuvants were added to this herbicide. The results revealed that the use of citogate and vegetable oils can increase the efficiency tribenuron methyl, and reduce the application rate of this herbicide in agro ecosystems.

UAV spraying on citrus crop: impact of tank-mix adjuvant on the contact angle and droplet distribution

“…Most tank-mix adjuvants aim for reducing evaporation, spray drift, and volatilization and improving pesticide’s ability to spread and stick on the target surface by reducing CA ( Celen, 2010 ; Melo et al, 2015 ; Santos, Ferreira & Viana, 2019 ). The addition of tank-mix adjuvant(s) into a pesticide product or pesticide spray mixture contributes to the reduction of spraying droplets’ CAs, which is expected to reduce off-target deposit effectively and obtain a better distribution ( Griesang et al, 2017 ; Mehdizadeh, Mehdizadeh & Baghaeifar, 2020 ; Meng et al, 2018 ; Sobiech et al, 2020 ). Therefore, some tank-mix adjuvants are able to reduce the amount of pesticide usage, enhance control efficacy, facilitate the delivery of pesticide chemicals, and alleviate environmental pollution ( Jibrin et al, 2021 ; Li et al, 2021 ; Meng et al, 2018 ; Preftakes et al, 2019 ; Wang et al, 2018 ).…”

Improving the Management of Parthenium hysterophorus to Enhance Okra Production through the Application of Chemicals, Adjuvants and Plant Extract Blends in Pakistan

“…The most appropriate temperature for parthenium weed growth was 22-25°C (Gnanavel, 2013). As heavy use of herbicide causes phytotoxic effects on crop and results in environmental hazards, scientists are searching for strategies to minimize their use (Mehdizadeh et al, 2020). Moreover, currently, parthenium have been controlled by employing synthetic herbicides which are proven to be very effective while extensive use of these chemicals are causing negative impact on environment by their accumulation in the water and soil in addition to their effects on the biological diversity (Leszczyński et al, 2019).…”

“…One of the conceivable approaches to reduce the weeds' growing problem is to reduce their doses through enhancing their efficacy by mixing with adjuvants or other reasonable bio-enhancers (Mehdizadeh et al, 2020). The adjuvant enhances the efficiency of herbicide by altering its surface active properties at the leaf surface, improving herbicides selectivity and uniform shower drops inclusion on plant tissue as opposed to molding up and moving off (Tagour et al, 2011).…”