In conclusion, we may state that the
potential advantages of unisexual forms in
classical biological control have not been
tested rigorously. This will remain difficult
to do because of the often limited time
available for biological control projects.
Once a good biocontrol agent has been
found, funds generally dry up for doing
additional work. In inundative releases, the
potential for doing comparative work on
the economy of applying unisexuals is bet-
ter and this should be done. Finally, if at
some point the technology of rendering sex-
ual forms unisexual has progressed to the
stage where it is easy to make sexual lines
unisexual, it will also be possible to test the
potential advantages of unisexuality in clas-
sical biological control.106 R. Stouthamer
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