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Out of a field of many thousands of amdogs of the insect juvenile hormones (JHA). only a few have found practical utility in the control of a variety of insect species. Their mode of action and the lack of foliar stability in all but the must rcccntlv discovered juvcnoids have st) far precluded their use against pests of field crops. A possible more efficacious mode of action is present in anti-juvenile hormone agents (AJH). which can induce premature metamorphosis, but of which none of the present prototypes has yet been. developed into a cost cflective control agent. These AJH prototypes represent a number of vcrv different action mechanisms and degrees of selectivity lk)r different insect taxa. In an even more contemporary approach, the interference with ncurohormonal pathways presents significant perspectives for insect control.

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