Other Applications of Biologically Active Terpenoids

Other synthetic terpenoid derivatives prepared as potential insecticides include further thiocyanato compounds among which is longifolyl thiocyano-acetate [668]. Relatively little attention would, however, seem to have been paid to the preparation of terpenoid organophosphorus compounds as potential insecticides or of terpenoid organotin compounds as potential fungicides. 

The interesting diterpenoid ryanodine, which has finally been shown to possess structure LXXVI [669] continues to find apphcation as an insecticide 

without doubt, the most exciting new possibilities for the control of insect pests, where terpenoids can be expected to play a major role, arise as a result of recent important advances in our understanding of insect physiology. These new approaches, which hold promise of eventually doing away with many, if not most, of the presently employed highly toxic insecticides capable 

The potentialities of the terpenoid group in this field, which is only beginning to be fully exploited [696-698] are probably best indicated at this point in time by considering what is presently known of the roles played by terpenoids in insect physiology. 

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