Volume No. 4 Issue No.: 1 Page No.: 171-177 July-Sept 2009

 

EFFECT OF TERPENOIDS ON NEMATODES : A REVIEW

 

Puja Ohri* and Satinder Kaur Pannu

Department of Zoology, Guru Nanak Dev University, Amritsar-143005 Punjab (INDIA)

 

Received on : May 25, 2009

 

ABSTRACT

 

Plant-parasitic nematodes are an economically important group of soil borne pathogens that may be controlled by cultural practices, chemical nematicides and the use of resistant cultivars. However, nematicides do not provide long-term suppression of nematodes, and environmental and human health concerns are resulting in increased restrictions on their use. Some safe procedures for nematode control have been developed based on biological control agents and organic amendments. One such alternative is to screen naturally occurring compounds in plants, which are known as plant secondary compounds. Among various classes of these plant secondary compounds, Terpenoids, have achieved the greatest structural and functional diversity in plants. Although these terpenoids lack any apparent role in the basic processes of growth and development in plants, many have ecological functions serving in the defense against herbivores and as allelopathetic agents. In the present review, a large number of terpenoids and their derivatives have been discussed for the nematicidal activity in various nematode systems. Gossypol, hemigossypol, methoxygossypol, methoxyhemigossypol and dimethoxygossypol have been found to be inhibitory to the larvae of root-knot nematode, Meloidogyne incognita. Similarly carvacrol, thymol, geraniol, camphor and linalool have been reviewed to be effective against M. incognita and M. javanica juveniles.

 

Keywords : Monoterpenes, diterpenes, sesquiterpenes, plant extracts, Meloidogyne spp.

 

 

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