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The Efficacy of the aqueous crude extract from Calotropis procera Linn. on the growth and production of tomatoes Lycopersicum esculentus Mill. infested by Meloidogyne javanica was investigated. An aqueous crude extract of Calotropis procera Linn. was prepared by soaking 2kg of dried powdered leaf in the ratio of 1:5mg/ml for 24 hours; this was sieved and concentrated with water bath at a controlled temperature of not above 60°C also freeze dried to obtain 487g of the dried crude extract. Thedoi:10.18311/jbc/2018/22745 fatcat:kwr2q6av4fdclpmqc65qbpgdvy