Effects of Plant Extracts on the Growth and Yield of Cowpea (Vigna ungnicnlatu (L.) Walp) infested with Root-knot nematode (Mehridogyne incognita Race 2):- Nzenwa. Peter O
ABSTRACT
Six Cowpea varieties (IT89KD — 391, 1T89KD — 288,
1F86KD - 719, IAR 48. I f assessed for resistance against root-knot nematode
field naturally infested with Meloidogyne incognita. Three varieties were
resistant,two were tolerant and one was rated susceptible experiment with plant
extracts in the greenhouse and field. The experiments were laid out in a
Completely Randomized Design (CRD) and Randomized Complete Block Design (RCBD)
with 14 treatments; (Hot water extracts (UWE) and Cold water extracts ol (CWE)
of Capsicum frutescens, Afromomum melegueta, Xylopia actiopica, Occimum
grattissimum. Nicotiana tabacum, Piper guinense, Lambdacyhalothrin and I
control) replicated 3 times. The result of the greenhouse experiment showed
that HWE O. grattisimum, HWE and CWE ofA. melegueta and HWE / aetiopica
significantly increased yield (<0.05) and suppressed did not differ
significantly with the synthetic insecticide-Lambdacy/udolhrin. The leaf by
local farmers. xii rnematode build up in the field. The aqueous extracts
reduced the number of galls on the roots, nematode populations in the root and
soil samples. The results obtained with these extracts 89KD) - 485 and Sokoto
Local) were respectively. The susceptible cowpea variety (IT89KD-288) was
selected for control disease on cowpea in the greenhouse and a extracts of the
test plants could therefore be harnessed as sources of natural nematicides of
plant origin to control t
0.0
NZENWA (2026). Effects of Plant Extracts on the Growth and Yield of Cowpea (Vigna ungnicnlatu (L.) Walp) infested with Root-knot nematode (Mehridogyne incognita Race 2):- Nzenwa. Peter O. Repository.mouau.edu.ng: Retrieved Mar 31, 2026, from https://repository.mouau.edu.ng/work/view/effects-of-plant-extracts-on-the-growth-and-yield-of-cowpea-vigna-ungnicnlatu-l-walp-infested-with-root-knot-nematode-mehridogyne-incognita-race-2-nzenwa-peter-o-7-2
NZENWA. "Effects of Plant Extracts on the Growth and Yield of Cowpea (Vigna ungnicnlatu (L.) Walp) infested with Root-knot nematode (Mehridogyne incognita Race 2):- Nzenwa. Peter O" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 31 Mar. 2026, https://repository.mouau.edu.ng/work/view/effects-of-plant-extracts-on-the-growth-and-yield-of-cowpea-vigna-ungnicnlatu-l-walp-infested-with-root-knot-nematode-mehridogyne-incognita-race-2-nzenwa-peter-o-7-2. Accessed 31 Mar. 2026.
NZENWA. "Effects of Plant Extracts on the Growth and Yield of Cowpea (Vigna ungnicnlatu (L.) Walp) infested with Root-knot nematode (Mehridogyne incognita Race 2):- Nzenwa. Peter O". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 31 Mar. 2026. Web. 31 Mar. 2026. < https://repository.mouau.edu.ng/work/view/effects-of-plant-extracts-on-the-growth-and-yield-of-cowpea-vigna-ungnicnlatu-l-walp-infested-with-root-knot-nematode-mehridogyne-incognita-race-2-nzenwa-peter-o-7-2 >.
NZENWA. "Effects of Plant Extracts on the Growth and Yield of Cowpea (Vigna ungnicnlatu (L.) Walp) infested with Root-knot nematode (Mehridogyne incognita Race 2):- Nzenwa. Peter O" Repository.mouau.edu.ng (2026). Accessed 31 Mar. 2026. https://repository.mouau.edu.ng/work/view/effects-of-plant-extracts-on-the-growth-and-yield-of-cowpea-vigna-ungnicnlatu-l-walp-infested-with-root-knot-nematode-mehridogyne-incognita-race-2-nzenwa-peter-o-7-2