Effects of Hot Water Obtained by Solar Energy on the Weeds Convolvulus arvensis L., Setaria viridis (L.) P. Beauv. and Amaranthus retroflexus L.

Abstract

This study was carried out to determine the effect of hot water obtained by the solar method (solar energy) on the different plant growth stages of Convolvulus arvensis, Amaranthus retroflexus, and Setaria viridis species, which are problematic in agricultural areas. Hot water at a temperature of 98 °C, obtained using the solar method, was applied at 15:00 pm. The hot water was applied in two different doses depending on the driving speed (1st speed: 4 km h-1, 2nd speed: 2 km h-1) of the tractor. The application was carried out at three stages of plant growth (20, 40, 60 days old plants). According to the BBCH scale, these periods correspond approximately to GS:19, GS:40, and GS:60. In the results of the study; it was found that hot water application was more effective in the of GS:19 2 km h-1 (77%) to the aerial parts of C. arvensis and GS:19 2 km h-1 (68%) to the underground parts of A. retroflexus. In the hot water speed, it was observed that the 2nd speed (2 km h-1) was more effective on weeds than the 1st speed (4 km h-1).