Efficacy of the nanoemulsion formulation of Rhus coriaria extract on selected tomato pathogens under greenhouse condition

Abstract

The formulation from R. coriaria aqueous crude 35% concentrate, Emereen 1820 (5%) and water (60%) was prepared. An in vitro analysis was conducted, to determine the effectiveness of the strategy, for managing Fusarium oxysporum (Acc. Number KM039054) and Colletotrichum boninense (Acc. Number KM039057), two of the most harmful bacteria, as well as Xanthomonas vesicatoria (Acc. Number KU661975), and Ralstonia solanacearum (Acc. Number KT783476), two well-documented bacteria. Plants treated with formulation prior to infection by bacteria and fungi were seen to exhibit moderate resistance against these pathogenic bacteria and fungi with 5 and 10% concentrations. The results derived from a comparison with the control sample, revealed that the application of both the concentrations, substantially decreased the total AUDPC, for all the investigated diseases. The most significant decrease in disease intensity (82.58, 70.38, 64.93 and 64.80% for X. vesicatoria, R. solanacearum, F. oxysporum and C. boninense respectively), is attributed to the application of nanoemulsion formulations, at a concentration of 10%. The remedial measures employed, served to greatly enhance the shoot height and root length, increase the dry shoot and dry root occurrence, boost the chlorophyll content, and expand the leaf surface area. In view of these outcomes, the sumac biopesticide formulation can be considered a more cost effective and eco-friendly alternative, to chemical pesticides, for the curbing of diseases affecting tomato plants.