Effects of pre‐harvest synthetic chemicals on post‐harvest bioactive profile and phytoconstituents of white cultivar of Vigna unguiculata grains

In this study, the impact of pre‐harvest synthetic chemical treatments on the post‐harvest bioactive compounds, phyto‐constituents, and thermal properties of white cultivar of V. unguiculata was investigated. The results showed that organic V. unguiculata grains (white cultivar) contained 36.02 g bioactive compounds/100 g grain, whereas nonorganic (control) recorded 22.94 g bioactive compounds/100 g grains. Among the bioactive compounds in the organic grains were [3‐(2‐hydroxy‐6‐methylphenyl)‐4(3H)‐quinazolinone (10.25 g/100 g grain)]; [methaqualone (13.94 g/100 g grain)]; [pyrazole‐3‐carboxylic acid, 4‐iodo‐1‐methyl‐ (5.78 g/100 g grain)]; and [cinnamic acid, p‐(trimethylsiloxy)‐, methyl ester (4.43 g/100 g grain)]. The identified bioactive compounds have health‐promoting potentials. Organic grains had peak viscosity of 114.02 RVU, final viscosity (135.81RVU), and pasting temperature (76.15°C), whereas nonorganic grains recorded peak viscosity of 84.89RVU, final viscosity (92.98 RVU), and pasting temperature (77.08°C). Organic grains had L*, a*, and b* of 84.31, 0.42, and 13.01, respectively. The nonorganic grains had 88.98, 0.33, and 15.09 for L*, a*, and b*, respectively. The enthalpies of the organic and nonorganic were 2.98 J/g and 2.94 J/g, respectively. Organic grains showed significant (p