Effects of different concentrations of capsaicin as a wildlife damage management on initial growth of pasture grass

Overseas, capsaicin is used as a measure against agricultural and forestry damage to Cervidae animals. The purpose of this study was to investigate the effects of spraying capsaicin solution adjusted to three concentrations on the growth of pasture grass. orchardgrass (Dactylis glomerata L.) and timothy (Phleum pratense L.) were subjected to the following treatments: pure capsaicin at three concentrations (1000 µM, 3000 µM, and 5000 µM), ethanol, and control water). Both the pasture grass species showed a significant reduction in plant length of pasture grass when subjected to 3000 µM and 5000 µM capsaicin (orchardgrass, timothy: control ; 19.5 ± 4.0 cm, 19.7 ± 2.0 cm, ethanol ; 19.7 ± 4.2 cm, 20.9 ± 3.0 cm, 1000 µM ; 17.4 ± 3.1 cm，16.4 ± 3.3 cm，3000 µM ; 13.3 ± 2.7 cm, 13.4 ± 2.2 cm, 5000 µM ; 7.3 ± 3.1 cm, 6.4 ± 2.3 cm, P