Cytotoxicity and Nematicidal Potential of Leaf Extracts of <em>Adansonia digitata</em> and <em>Khaya senegalensi</em>s on Root Knot Nematode (<em>Meloidogyne incognita</em>) Associated with Cabbage

Abstract

Purpose: Cabbage, an indispensable vegetable is often plagued by Meloidogyne incognita, a circumstance which lessens yield. Extracts of Khaya senegalensis and Adansonia digitata were appraised for possible nematicidal activity to check the menace of M. incognita sequel to the undesirable effect of synthetic nematicides in the environment.Research Method: Leaf materials were extracted in organic and aqueous extracts. The extracts were used as soil admix at 0, 150, 200 and 250 g/Kg soil, in a randomized complete block design experiment. Carbofuran a synthetic nematicide served as positive check for the extracts. Data was taken on vegetative growth, yield and nematode population. Lethality of the various extracts to brine shrimp larvae was also assessed. Findings: The aqueous extract was not as productive as the ethanol and methanol extracts. A. digitata extracts demonstrated weak nematicidal activity as against what was observed in cabbage plants treated with K. senegalensis extracts. Cytotoxicity evaluation of the organic and aqueous extracts of A. digitataindicated that the methanol extract expressed weak cytotoxicity (500 µg/ml -1000 µg/ml), while the aqueous and ethanol extracts were not toxic to the brine shrimps (LC 50 >1000µg/mL). K. senegalensis extracts were active against brine shrimp larvae with LC 50 values <1000µg/mL The methanol and ethanol extracts demonstrated strong cytotoxicity with LC 50 values <100µg/ml. Extracts from K. senegalensis significantly (p=0.05) increased the vegetative growth of cabbage plants.Originality/ Value: These results signify that the species have a probable use in the bio-pesticide industry, without any toxicity as the synthetics.

MANAGEMENT OF Meloidogyne incognita DAMAGING LETTUCE: POTENTIAL OF CHROMATOGRAPHIC FRACTIONS AND EXTRACTS FROM Lawsonia Inermis

“…Reports by Viaene and Abawi (1998) specified that amending soil with Sudan grass notably reduced M. hapla reproduction on lettuce resulting in increase of lettuce head weight at harvest. Countless leading-edge studies have shown that extracts of various plant species such as Chenopodium quinoa (Khan and Javaid, 2020), Euphorbia prostrata (Ferdosi et al, 2021a), Bergenia ciliata (Ferdosi et al, 2021b), Eucalyptus officinalis (Fabiyi, 2021c), Khaya senegalensis (Fabiyi, 2022c) and diverse purified active principles contain potent nematicidal compounds (Atolani and Fabiyi, 2020).…”

Nematicidal Activity of Pyrolisate of Bambusa vulgaris on Root-Knot Nematode; Meloidogyne incognita of Lettuce

“…Plant parasitic nematodes (PPNs) are regarded as a major threat to agricultural crop production causing extensive significant yield losses to farmers worldwide ( Javad et al, 2006;Fabiyi, 2022a). Meloidogyne species also called the root-knot nematodes (RKN) are described as the most devastating due to their wide host range (Bello et al, 2020;Fabiyi, 2021a) and being responsible for yearly crop loss reaching approximately hundred million US dollars worldwide (Chitwood, 2003).…”

Application of Fatty Acid Esters on Meloidogyne incognita Infected Jew's Mallow Plants

“…Efforts have been made to study the nematicidal potential of some plant extracts on the survival and reproduction of plant parasitic nematodes (Fabiyi et al, 2020b;Fabiyi, 2022b). Citrus fruit canning waste, thiarubrinc a root extract from Rudbeckia hirta and common agro wastes such as cocoapod husk, cassava, orange, pineapple and potato, peels have been reported to be an effective control against nematodes with subsequent significant improvements in crop yield (Egunjobi and Olaitan, 1986;Babatola, 1989;Viala et al, 1998;Fabiyi, 2022c).…”