The influence of selected spraying parameters on two formulation of sulfonylurea herbicides effect

Kieloch, R.; Domaradzki, K.

doi:10.5513/jcea01/14.1.1153

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…High droplet concentration of some herbicides may induce crop injury. Many studies reported that droplet size, droplet concentration, spray volume affect herbicide application efficacy [19] . When droplet concentration is high, uptake of herbicide may decrease due to leaf tissue necrosis or increase due to increased herbicide gradient.…”

Section: Introductionmentioning

confidence: 99%

Weed control effect of unmanned aerial vehicle (UAV) application in wheat field

Chen¹,

Qi²,

Li³

et al. 2018

International Journal of Precision Agricultural Aviation

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Wheat is a major food source throughout the world. However, biological factors like pests and weeds can lead to lower crop yield. Most crop protection nowadays involves pesticide and herbicides application. This is commonly conducted with knapsack in China, which is inefficient and high labor intensive. Unmanned aerial vehicle (UAV) are an aerial spraying technology recently-developed. Using UAV application is more flexible and standardized, the spraying efficiency is 60 times more than knapsack sprayer. However, weed management using UAV is still a challenge. Low spray volume and droplet density with less penetration may affect weed control efficacy. High droplet concentration may induce crop injury. This study focused on discovering crop safety and weed control efficacy of UAV in wheat fields. Different herbicides, rates and spray volume were tested for pre-emergence (PRE) and post-emergence (POST). The results show that no crop injury was induced for PRE. While 10%-20% injury on wheat was found for POST. All herbicides treatments showed significant effects on weed management compared to untreated control. However, the efficacy was not stable between years and fields. Weed management for PRE can reach 98%-100% when the soil is humid, smooth and with no straw coverage when using diflufenican + isoproturon (120 + 1200 g ai ha-1). For POST application via UAV, weed injury ranged from 10% injury to 70%, in which isoproturon + clodinafop-propargyl + mesosulfuron (120 + 7.5 + 0.9 g ai ha-1) injured weed the most in 2018 (reached 70%). Knapsack sprayer showed relatively better weed control efficacy in many cases for POST applications. Weeds showed certain degree of resistance. In general, PRE application with UAV showed better potential, but herbicide spraying needs to be combined with field management to achieve better weed management efficacy.

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Section: Introductionmentioning

confidence: 99%

Weed control effect of unmanned aerial vehicle (UAV) application in wheat field

Chen¹,

Qi²,

Li³

et al. 2018

International Journal of Precision Agricultural Aviation

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“…The sulfonylurea herbicides are characterized by broad-spectrum weed control at very low rates (2-75 g ha -1 ) showing good crop selectivity [3,4] with systemic and residual action.…”

Section: Introductionmentioning

confidence: 99%

Metsulfuron-methyl determination in environmental samples by solid surface fluorescence

Alesso

Almeida

Talio

et al. 2018

Microchemical Journal

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A new environmental friendly methodology for metsulfuron-methyl quantification based on the fluorescent signal enhancement of rhodamine B dye has been developed. A cationic surfactant (cetyltrimethylammonium bromide, CTAB) and an anionic one (sodium dodecylsulfate) were employed to preconcentrate the herbicide using a coacervation phenomenon, in sodium borate buffer medium (pH 9.2). The coacervate phase was collected on a nylon membrane (0.45 μm) and the solid surface fluorescence signal was determined (λexc = 515 nm, λem = 565 nm). Experimental variables that influence on preconcentration step and fluorimetric sensitivity have been studied and optimized using response surface methodology. Under optimal working conditions, a LOD of 0.17 μg L -1 and a LOQ 0.53 μg L -1 was obtained. The zero th order regression calibration was linear from 0.53 to 5.00 μg L -1 . The method showed adequate sensitivity and selectivity, and was applied to the determination of trace amounts of metsulfuron-methyl in environmental water samples. The proposed methodology implies an alternative to traditional techniques for metsulfuron-methyl monitoring using an accessible instrument in control laboratories, Correspondence author

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