Further studies with plant extracts on root-knot nematode (Meloidogyne javanica) larvae.
Krishnamurthy G. V. G., Murthy P. S. N.
Author Affiliation: Central Tobacco Institute, Rajahmundry 533 105, India.
Botanical pesticides in integrated pest management: Proceedings of National Symposium held on January 21-22, 1990 at Central Tobacco Research Institute, Rajahmundry, 533 105, India. : 438-448
Abstract : Plant species (44) belonging to millets, pulses, oilseeds, narcotics, horticultural crops and ornamental plants were tested for nematicidal activity against Meloidogyne javanica as water extracts at dilutions of 1:10, 1:100 and 1:1000. Nicotine and nicotine sulfate were also tested at these dilutions. Observations were taken on larval mortality or otherwise, on 4 consecutive days, by transferring the treated larvae to fresh water daily. The extracts exerted 5 types of responses on the larvae. On this basis, 14 plant species, viz. Sorghum vulgare, Brassica nigra, Nicotiana tabacum, Clerodendron inerme [Clerodendrum inerme], Catharanthus roseus, Allium sativum, Capsicum annuum, Moringa oleifera, Pongamia glabra [P. pinnata], Caesalpinia crista, Piper nigrum, Tamarindus indica, Mangifera indica and Chrysanthemum indicum were found to possess higher nematicidal effects than the rest at the 1:10 dilution level, while dilutions of 1:100 and 1:1000 were less effective. In the case of nicotine and nicotine sulfate, all the 3 dilutions showed high nematicidal effects.