BIOACTIVITY OF AQUEOUS EXTRACT OF Vernonia amygdalina AND Peperomia pellucida ON Meloidogyne incognita INFECTING TWO TELFAIRIA ACCESSIONS.

Author(s): Apalowo, Oluropo Ayotunde*, Izuogu, Nkechi Betsy, Baba, Halimat Shola, Mustafa, Suleiman
Volume/Issue: Volume 1 , Issue 1 (2021)

ABSTRACT:

Pot and field trials were conducted at the Teaching and Research farm of University of Ilorin, Nigeria to determine the efficacy of aqueous extracts of Vernonia amygdalina and Peperomia pellucida in the management of Root-knot nematode, Meloidogyne incognita infecting two accessions of Telfairia occidentalis Hook. F. Pots were inoculated with galled roots of Celosia agentea one week before planting to increase the initial nematode population. The pot trial was set up in a Completely Randomized Design with five replicates while the layout for the field experiment was a Randomized Complete Block Design replicated four times. Transplanted twoweek old seedlings in the pots were inoculated with 10g of infected Celosia galled root before application of treatment whereas the field was naturally infected. Treatment was applied a week after transplanting and repeated six weeks after transplanting. Results from the study revealed that treated plants in both trials had significantly higher number of branches, vine length and number of pods. Also, the population density and galling of roots were significantly reduced in treated plots to 3 and 4 against the control which has a gall rating of 7 and 6 respectively in pot and field. While the improved yield and reduction in nematode population could be traced to the treatments used, the tolerance of the accessions cannot be discountenanced.

KEYWORDS:

Botanicals, Root-knot nematode, Telfairia occidentalis, Accessions, Seedlings