The effect of five composts of different origin on the survival and reproduction of Globodera rostochiensis

Five composts of different origin (C1: fresh olive pomace, straw, chicken manure and urea; C2: fresh olive pomace, cow manure, lettuce residues, straw and sawdust; C3: sewage sludge and municipal green residues; C4: grass, leaves, tree branches and soil; C5: by-product from penicillin production (mycelium), straw and sawdust, were tested for the control of the cyst nematode, Globodera rostochiensis, on potato in pot experiments. Composts were mixed with the nematode-infested soil at the rates of 1.0, 2.5, 5.0 and 10.0% w/w. A significant reduction in the number of eggs and juveniles was observed at all concentrations of the tested composts; compost from olive pomace mixed with urea resulted in the greatest decrease.