<![CDATA[The research aims to evaluate effectiveness of leaf extract oh neem, piper, and eupathorium as botanical pesticide and its compatibility which use of biological control agents Trichoderma for control of club root disease. The test conducted in greenhouse belong to Faculty of Agriculture, University of Sebelas Maret at Surakarta., on June till September 2004. The research used completely randomized design with 3 replications consisted 10 soil treatments before planting using leaf extract of neem (Azadirachta indica), Piper betle, and Eupathorium inulifolium and Trichoderma or its combinations. As dependent variables are disease severity, weight of health root, weight of fresh biomass and dryy biomass.The result of the research showed that soil treatment using leaf extract of neem, piper, and euphatorium could reduce effectively disease severity of club root. Treatment combinations of leaf extract of neem, piper, and euphatorium could increase effectiveness of control of club root and compatible with soil treatment using Trichoderma so it could increase effectiveness of the disease control.]]>
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