Lactic acid as a potential herbicide of mungbean (Vigna radiata (L.) R. Wilczek): effect or growth and yield performance
2019
Rapadas, R.R.Jr. | Sumalapao, D.E.P. | Ledesma, N.A.A.
Lactic acid is a naturally produced compound that has been used as a safe environmental herbicide against a variety of grass and broadleaf weed species. However, it was found to be toxic to certain leguminous plants. It might also be toxic to important legume crops such as the mung bean (Vigna radiate (L.) R. Wilczek). This study aimed to (1) determine the percentage composition of lactic acid that can constrain the most number of weeds without affecting mung bean survivability and (2) assess the effect of lactic acid on the growth and yield performance of the crop. A two factorial experiment arranged in Completely Randomized Design (CRD) with four treatments and three replications was employed in this study. The different treatments evaluated were control (no herbicides solution), 2% lactic acid, 4% lactic acid and Roundup (positive control). The results revealed that the plants administered with 4% lactic acid obtained the tallest plant height at maturity, most number of leaves produced per plant, the highest yield per plot, and the most number of weeds being constrained compared to Roundup. However, when the mung bean variety was included as a variable, slightly different response was observed between 'Ginituan' (yellow) and 'Kulabo' (green). 'Ginintuan' had a higher tolerance for lactic acid with no significant differences found at the 4% level of concentration when compared with the control and had the highest value obtained in every parameter compared to 'Kulabo'. Minimum effect was observed at 2% of lactic acid as with the Control groups. The results suggest that as an herbicide, up to 4% of lactic acid could be safe to use on both varieties of mung bean as it did not affect the growth and yield performance of the crop, whereas it was effective in constraining weeds.
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