Abstract
Rapeseed and crambe meals, when added to soil infested with eggs of Meloidogyne arenaria, reduced the number of galls on tomato (‘Rutgers’) roots. Both meals, however, were phytotoxic to tomato and reduced the height of celosia, dianthus, and rose periwinkle plants, and resulted in lower germination of periwinkle seed. When the planting of tomato was delayed for 3 weeks after addition of 1% meals the phytotoxicity and root injury were diminished, but not alleviated. The ED50 for rapeseed meal against peanut root-knot nematode was determined to be 0.64% v v when added to piedmont soil and planting occurred immediately, or 0.86% when planting was delayed 1 week.
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