%0 Conference Paper %A McLeod, Anni %A Ndungu, Beth %A Karanja, Daniel %A Karanja, Peter %D 2002 %E Powell, Jane %E et al., %F orgprints:8311 %I Organic Centre Wales, Institute of Rural Studies, University of Wales Aberystwyth %K Colloquium of Organic Researchers; COR; tomato; root-knot nematode; participatory budgeting; Kenya; biological pest control %P 123-124 %T Farmer evaluation of biocontrol methods against rootknot nematodes in tomatoes %U http://orgprints.org/8311/ %X This report was presented at the UK Organic Research 2002 Conference. Root-knot nematodes in tomatoes cause financial loss to Kenyan smallholders. While soil fumigation appears to be losing effectiveness two bio-control agents (bcas), Pasteuria penetrans and Verticillium chlamydosporium, appear promising. Participatory budgeting is being used to compare the bcas with chemical and other biological controls on commercial and organic smallholdings.