THE IMPACT OF MCPA (2-METHYL-4-CHLOROPHENOXYACETIC ACID) IN THE CONTROL OF CIRSIUM ARVENSE AND TARAXACUM OFFICINALE SPECIES IN GRASSLAND ECOSYSTEMS
DOI:
https://doi.org/10.52846/aamc.v54i2.1575Abstract
This study aimed to determine the impact of MCPA (2-methyl-4-chlorophenoxyacetic acid) in reducing Cirsium arvense and Taraxacum officinale species in grassland ecosystems. The presence of Cirsium arvense and Taraxacum officinale species represents an obstacle in the preservation and restoration of biodiversity in temporary meadows. At the same time, these species reduce the yield of meadows, a fact that requires the application of control methods. The practical ecosystem in which the study was carried out belongs to the town of Carani, Timiș county. To reduce the population of Cirsium arvense and Taraxacum officinale were applied three herbicides: MCPA 50% DMA, MCPA 75% DMA and Starane. Hormonal herbicides MCPA 50% DMA (0.9 l/ha, 1.2 l/ha, 1.5 l/ha, 2.0l/ha) and MCPA 75% DMA (0.6 l/ha, 0.8 l/ha, 1.0 l/ha, 1.3 l/ha) were applied in four doses. The impact of the substance MCPA, in the control of Cirsium arvense and Taraxacum officinale species, was determined at 15 – 28 and 42 days after application. The herbicides used in the experiment reduced Cirsium arvense and Taraxacum officinale populations in grassland ecosystems by 60-100%. The application of 2-methyl-4-chlorophenoxyacetic acid (MCPA), in different doses, led to a survival of common dandelio, in the experimental variants of 3.33 - 20%. The population being controlled in a proportion of 80-96.67%, 42 days after applying the treatments. The impact of the herbicide, hormonal, MCPA was lower in population control of Cirsium arvense. The effectiveness of the herbicides depended on both the active substance content and the applied dose.