The Open Natural Products Journal




(Discontinued)

ISSN: 1874-8481 ― Volume 8, 2015

Nematicidal Activity of Plant Extracts Against the Root-Knot Nematode, Meloidogyne incognita


The Open Natural Products Journal , 2009, 2: 77-85

Wiratno, D. Taniwiryono, H. Van den Berg, J.A.G. Riksen, I.M.C.M. Rietjens, S.R. Djiwantia, J.E. Kammenga, A.J. Murk

Indonesian Medicinal and Aromatic Crops Research Institute, Jl. Tentara Pelajar No. 3, Bogor, Indonesia.

Electronic publication date 21/10/2009
[DOI: 10.2174/1874848100902010077]




Abstract:

Nematicidal activity of extracts from plants was assayed against Meloidogyne incognita. In laboratory assays extracts from tobacco (Nicotiana tabacum L), clove (Syzygium aromaticum L), betelvine (Piper betle L), and sweet flag (Acorus calamus L) were most effective in killing the nematode, with an EC50 that was 5-10 times lower than the EC50 of the synthetic pesticides chlorpyrifos, carbosulfan and deltamethrin. The shapes of the dead nematodes differed in a characteristic way, and groups of pesticides and plant extracts could clearly be distinguished based on this phenomenon, which may be an indicator for the modes of action of the tested pesticides. In a greenhouse bioassay clove bud and betelvine were tested as mulch. Experiments revealed that the total number of live nematodes on roots of pepper plants treated with mulch of the clove bud was 7% of that of the controls and did not differ significantly from that of plants treated with the recommended synthetic pesticide carbofuran. The application of clove buds as a botanical pesticide for future use against nematodes is highly promising since clove is the 6th major plant grown on Bangka Island, and the market value of clove has decreased sharply over the last years.


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