Cover Image
close this bookControlling Insect Pests of Stored Products Using Insect Growth Regulators and Insecticides of Microbial Origin (NRI, 1994, 58 p.)
View the document(introduction...)
View the documentAcknowledgments
View the documentAbbreviations
close this folderSummaries
View the documentSummary
View the documentRésumé
View the documentResumen
View the documentSection 1: Introduction
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
close this folderSection 3: Insect growth regulators: specific details
View the documentJuvenile hormone analogues
View the documentChitin inhibitors
View the documentDiscussion
close this folderSection 4: Microbial control
View the document(introduction...)
View the documentInsect viruses
View the documentBacteria
View the documentProtozoa
View the documentFungi
close this folderSection 5: Overall summary
View the documentInsect growth regulators
View the documentMicrobial control agents
View the documentRecommendations
View the documentConclusion
close this folderAppendices
View the documentAppendix 1: References and further reading
View the documentAppendix 2: List of compounds described in review, including IUPAC chemical name, code number, trade mark, manufacturers producing the compound and toxicological data
View the documentToxicological data for compounds examined, compared with data for conventional grain protectants

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.