Nematicidal Effects Of Some Plant Extracts On Egg Hatchability And Control Of Meloidogyne Spp. In Cowpea (Vigna Unguiculata (L.) Walp.):- Nzenwa, Odinaka P
ABSTRACT
The
effects of cold and hot aqueous extracts of 5 test plants (Luffa cylindrica,
tvlomordica charantia, Euphorbia hirta, Desmodium scorpiurus and Stachytarpheta
cayennensis), wood ash, a synthetic nematicide (kaiatQ-Lambdacyhaloihrin) and a
tap water treated control were evaluated against the egg hatchability and
control of Meloidogyne spp in cowpea (Vigna unguiculata (L.) WalpJ in the
laboratory and green house. The experiments were laid out in a completely
randomized design (CRD) with 13 treatments; (Hot water extracts (HWE) and cold
water extract (CWE) of L. cylindrica', E. hirta, D. scorpiurus, S. cayennensis,
wood ash, karate (Lamdacylalothriri) and control) replicated 3 times. The
result ofthe laboratory experiment showed that the hot and cold water extracts
ofL. cylindrica, and HWE ofAT. charantia, significantly (p < 0.05) inhibited
the hatching of eggs of the pathogen. Result obtained from the Green house
experiments indicated that HWE of E. hirta, CWE ofS. cayennensis and CWE and
HWE of L. cylindrica significantly increased yield, (P< 0.05). 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 did not differ
significantly with the synthetic nematicide (Karate — lambdacyhalothrin). The
leaf extracts of the test plants could therefore be harnessed as source of
nematicides of plant origin to control the devastating effects ofplant -
parasitic nematodes in cowpea field by local farmers.
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NZENWA (2025). Nematicidal Effects Of Some Plant Extracts On Egg Hatchability And Control Of Meloidogyne Spp. In Cowpea (Vigna Unguiculata (L.) Walp.):- Nzenwa, Odinaka P. Repository.mouau.edu.ng: Retrieved Aug 24, 2025, from https://repository.mouau.edu.ng/work/view/nematicidal-effects-of-some-plant-extracts-on-egg-hatchability-and-control-of-meloidogyne-spp-in-cowpea-vigna-unguiculata-l-walp-nzenwa-odinaka-p-7-2
NZENWA. "Nematicidal Effects Of Some Plant Extracts On Egg Hatchability And Control Of Meloidogyne Spp. In Cowpea (Vigna Unguiculata (L.) Walp.):- Nzenwa, Odinaka P" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 31 Jul. 2025, https://repository.mouau.edu.ng/work/view/nematicidal-effects-of-some-plant-extracts-on-egg-hatchability-and-control-of-meloidogyne-spp-in-cowpea-vigna-unguiculata-l-walp-nzenwa-odinaka-p-7-2. Accessed 24 Aug. 2025.
NZENWA. "Nematicidal Effects Of Some Plant Extracts On Egg Hatchability And Control Of Meloidogyne Spp. In Cowpea (Vigna Unguiculata (L.) Walp.):- Nzenwa, Odinaka P". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 31 Jul. 2025. Web. 24 Aug. 2025. < https://repository.mouau.edu.ng/work/view/nematicidal-effects-of-some-plant-extracts-on-egg-hatchability-and-control-of-meloidogyne-spp-in-cowpea-vigna-unguiculata-l-walp-nzenwa-odinaka-p-7-2 >.
NZENWA. "Nematicidal Effects Of Some Plant Extracts On Egg Hatchability And Control Of Meloidogyne Spp. In Cowpea (Vigna Unguiculata (L.) Walp.):- Nzenwa, Odinaka P" Repository.mouau.edu.ng (2025). Accessed 24 Aug. 2025. https://repository.mouau.edu.ng/work/view/nematicidal-effects-of-some-plant-extracts-on-egg-hatchability-and-control-of-meloidogyne-spp-in-cowpea-vigna-unguiculata-l-walp-nzenwa-odinaka-p-7-2