THE HATCHING RESPONSE OF HETERODERA FICI TO DIFFERENT CONCENTRATIONS OF SODIUM METAVANADATE SOLUTIONS

Abstract

The effect of different concentrations (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 mM) of sodium metavanadate solutions on the emergence of juveniles from cysts of Heterodera fici was compared with that of root leachate of commercial fig and distilled water. The cysts were collected by the Fenwick can from dried soil and batches of 50 each were incubated in the hatching agent for seven weeks at 25 ºC ± 1. The largest hatch (55.5%) occurred in fig root leachate. In sodium metavanadate maximum nematode emergence occurred at 0.6 mM.