Influence of fertilizers and chemical foliar sprays on rotenoid production of Trigonella foenum graecum L.
Keywords:Trigonella foenum graecum, Rotenoids, Foliar spray, Grain yields, Natural product
AbstractA field experiment was conducted with the NLM (Prabha) variety of fenugreek (Trigonella foenum graecum) at the Agriculture Research Station Durgapura, Jaipur (Rajasthan). The seeds of fenugreek were sown in split-block designed plots. There were 48 treatment combinations of fertilizers (N and P) and foliar sprays containing the hormone naphthaleneacetic aad (NAA) or one of the chemicals H2SO4 or H3PO4 applied at pre-flowering followed by a second spray 15 days after the first. The seeds were analysed for yield and recovery of rotenoid, a naturally occurring insecticide. There was significantly higher grain yield from the combination 40 kg N ha-1, 90 kg p ha-1, and NAA spray, and significant higher rotenoid recovery from the combination 20 kg N ha-1, 90 kg P ha-1, and water spray, which was similar to the recovery from 40 kg N and 60 kg P ha-1 and H3PO4 spray.