Powdery leaf extracts for control of root knot nematode in African yam bean

Abstract

Synthetic chemicals have been used to control plant pathogenic nematodes in the farmers fields. These chemicals, though valued for their effectiveness, are costly and may constitute health hazards to farm households and the environment. Reducing these situations in the farms through use of natural plant extracts is one of the challenges in Nigeria. Powdery extracts of Jatropha curcas, Parkia biglobosas, Newbouldia laevis, Ficus exasperata and Cassia alata were evaluated for the control of M. incognita in yam bean (Sphenostylis stenocarpa Hochst ex A. Rich) at the University of Nigeria, Nsukka in Nigeria. Newbouldia laevis extract significantly (P<0.05) controlled the galling of Meloidogyne incognita, while the efficacy of other extracts were insignificant (P >0.05). Newbouldia laevis extract had significant effects on the height of the plant. Significant difference was observed on the plants height. Newbouldia laevis extract reduced the number of galls from 1.89 to 1.18 and increased the height from 106.1 to 213.3 cm and the number of leaves from 59.2 to 69.2 compared with control (water treatment). Cassia alata extract had a significant effect on both leaf numbers and stem height of the plant. It increased the number of the leaves from 59.2 to 81.3 and the height from 196.1 to 201.3 cm, and the number of root gall from 1.89 to 2.49.

Screen house management of Meloidogyne javanica (Treub) in UC82B Tomato (Solanum lycopersicum) with leaf extract of Jatropha curcas

“…This means that extract contains antimicrobial nutrients which are antagonistic to the nematode attack on the test crop. Non-chemical strategies had been employed in the control root knot nematode infections in tomato (Ogwulumba and Ogwulumba, 2010;Ogwulumba et al, 2011;Ugwuoke et al, 2011). Onyenobi and Achale (2008) reported the efficacies of various plant extracts in the control of root knot nematode on crops.…”

In vitro nematicidal effect of Chenopodium ambrosioides and Castela tortuosa n-hexane extracts against Haemonchus contortus (Nematoda) and their anthelmintic effect in gerbils

“…Clean technologies for livestock and agriculture production require the use of traditional alternatives to control a number of diseases. The use of plants or plant extracts with anti-parasitic effects to control animal parasitic nematodes has gained interest among researchers worldwide during the last few decades (Ugwuoke et al ., 2011). The present study was designed to (1) assess the in vitro nematicidal effect of C. ambrosioides and C. tortuosa n -hexane extracts (E-Cham and E-Cato, respectively) against H. contortus infective larvae (L3), and (2) evaluate the in vivo anthelmintic effect with either a single or combined use of the extracts in gerbils as a study model.…”