Anti-juvenile hormones
AssigneeCornell Research Foundation, Inc.
InventorWilliam S. Bowers
Life of this patent
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Abstract
Potential insect control compounds which are chromenes, as well as their method of preparation and use, are disclosed. Compounds have been found which are effective in the control of insects by inhibiting the actions of juvenile hormone. An example of a useful compound is 5-methyl-7-ethoxy-2,2-dimethyl-3-chromene. Such compounds act to induce precocious maturation of immature insects, resulting in death either during or within a short time before or after the molting to an incompetant precocious adult. Additional effects which have been obtained include sterilization of mature insects.
Claims21
A method of treating an insect to inhibit juvenile hormone activity in said insect and thereby effect insect control which comprises contacting an insect with an active anti-juvenile hormone corresponding to the formulae:
- ##STR14## wherein R.sub.6 and R.sub.7 are each hydrogen, or straight or branch chain lower alkyl containing 1-4 carbon atoms;
- and
- R.sub.8, R.sub.9, R.sub.10 and R.sub.11 are each hydrogen, straight or branch chain lower alkyl, alkenyl, alkoxy, alkynoxy or alkenoxy containing 1-4 carbon atoms;
- provided that at least one of R.sub.9 and R.sub.10 is lower alkoxy or alkenoxy containing 1-4 carbon atoms;
- and further provided that at least one of R.sub.8 and R.sub.11 is straight or branch chain lower alkyl, alkenyl, alkoxy alkynoxy or alkenoxy containing 1-4 carbon atoms;
- or provided that R.sub.10 is lower alkoxy or alkenoxy containing 1-4 carbon atoms and at least one of R.sub.8, R.sub.9 and R.sub.11 is phenyl;
- or provided that R.sub.10 is lower alkoxy or alkenoxy containing 1-4 carbon atoms and R.sub.9 is lower alkyl containing 1-4 carbon atoms.
An active anti-juvenile hormone corresponding to the formulae:
- ##STR21## wherein R.sub.6 and R.sub.7 are each hydrogen, or straight or branch chain lower alkyl containing 1-4 carbon atoms;
- and
- R.sub.8, R.sub.9, R.sub.10 and R.sub.11 are each hydrogen, straight or branch chain lower alkyl, alkenyl, alkoxy alkynoxy or alkenoxy containing 1-4 carbon atoms;
- provided that at least one of R.sub.9 and R.sub.10 is lower alkoxy or alkenoxy containing 1-4 carbon atoms;
- and further provided that at least one of R.sub.8 and R.sub.11 is straight or branch chain lower alkyl, alkenyl, alkoxy alkynoxy or alkenoxy containing 1-4 carbon atoms;
- or provided that R.sub.10 is lower alkoxy or alkenoxy containing 1-4 carbon atoms and at least one of R.sub.8, R.sub.9 and R.sub.11 is phenyl;
- or provided that R.sub.10 is lower alkoxy or alkenoxy containing 1-4 carbon atoms and R.sub.9 is lower alkyl containing 1-4 carbon atoms.
Dependencies are inferred from the claim text.