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close this bookControlling Insect Pests of Stored Products Using Insect Growth Regulators and Insecticides of Microbial Origin (NRI, 1994, 58 p.)
close this folderSection 2: Insect growth regulators: general account
View the document(introduction...)
View the documentChitin inhibitors
View the documentJuvenile hormone and juvenile hormone analogues
View the documentAnti-juvenile hormones
View the documentInsecticide development and registration
View the documentReview of insect growth regulators
View the documentEffect of insect growth regulators on non-target organisms

Juvenile hormone and juvenile hormone analogues

Insect juvenile hormone (JH) controls metamorphosis and development. Studies have shown that maintenance of JH at a high level prevents the development of larvae and nymphs into adults. They remain as juveniles, often continuing to grow, and sometimes producing what are known as super-larvae.

Once the structure and function of juvenile hormone has been established analogues were synthesized, of which several were exploited commercially. The best known of these juvenile hormone analogues (JHAs) are methoprene, hydroprene and fenoxycarb. These substances do not kill adult insects but they prevent juvenile stages from completing their development. Control of an insect population is therefore a gradual process.