Demonstration of orobanchicidal effects of allelochemical
released by cereals suggests the potential of developing a
practical broomrape management strategy using cereals as
green manure crops or as intercrops. However, determining the
toxicity of specific compounds involved in broomrape
suppression is only part of the information needed to optimize
this management strategy. Further research is needed to
understand the fate of allelochemicals in soil and their use for
broomrape control. In addition to determining the concentration
of these compounds in soil, an appropriate cultivar
containing large concentrations of allelochemicals must be
used. For example, the amount of hydroxamic acids varies
greatly with plant age, organ, and cultivar, being affected by
water stress conditions, high temperatures, and fertilization.48
Hydroxamic acids do not persist for long periods.49,50 This
degradation in soil is interesting as this avoids the risks of
accumulation of toxic compounds in soil