Investigation of the effectiveness of AC/DC electric current as a weed control method using NDVI technique

Abstract

Due to the negative environmental effects of herbicides, restrictions are imposed in many developed countries and the transition to alternative methods is encouraged. Upon these restrictions and prohibitions, non-chemical weed control methods have been started to be developed. One of these alternative weed control methods is the electric current method. Background: Using multiple electrodes, the mortality rates were measured by exposing the plants germinated in laboratory conditions to AC and DC currents for different periods. Objective: In this study, the effects of direct current (DC) and alternating current (AC) on the mortality rates of plants were investigated.Methods: By comparing the NDVI (normalized difference vegetation index) values measured before and 1 week after the plants were exposed to electrical current, the effect of AC/DC on the mortality rate was determined. Results: While mortality was between 11% and 17% for AC, mortality occurred at a rate of 31% in plants that had 300 volts DC applied for 350 s. Conclusions: The degrees (r) of these relationships were 79.7% and 95.7%, respectively. According to these results, mortality rates increased as the voltage increased.

Research status and prospect of high-voltage electric weeding technology and equipment

“…Figure 2. Variable position high-voltage electric weeding test In 2017, Turkish Hasan Sahin et al artificially studied the effects of AC, DC voltage on weeds, By comparing the NDVI (Normalized Vegetation Index) values for 1 week before and after electrification, Determine the effect of AC / DC voltage on weed mortality[27] , The experiments are shown in Figure3, studies have shown, At the discharge time of 150,250, and 350 seconds, At a voltage of 110V, Weeds do not die; At the discharge time of 350s, At 220V and 300V DC, Weed mortality rate is 10% -31%, With an alternating current of the same size, Weed mortality rate is 11% -17%; Whether under AC or direct current, Weed mortality rate increases with increasing voltage and discharge time; in addition, The experimental influencing factors are not only related to the voltage and the discharge time, It is also related to parameters such as weed age, root and stem structure, type, and soil moisture.…”