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By:

JUGES RAJ

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INTRODUCTION

ROLE OF JUVENILE HORMONE (JH)

FORMS OF JH

SYNTHETIC FORMS OF JH

APPLICATIONS OF JH

EXAMPLES OF RESEARCH RELATED TO JH

CONCLUSION REFERENCES

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In insects Juvenile Hormone (JH)refers to agroup of hormones, which ensure growth of

the larva, while preventing metamorphosis.

Juvenile hormone is secreted by corpusallata.

Chemically, they are a group of acyclic

sesquiterpenoids that regulate many aspects

of insect physiology i.e., development,reproduction etc

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Juvenile hormone (JH), produced by thecorpora allata, regulates two important

processes in insects.

The first is development; as an insect

develops, the degree juvenility of the nextstage is determined by the amount of JH in

the blood; the lower the JH, the more adult

the next stage.

Experimental removal of the corpora allataresults in premature development of adult

characteristics.

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The other function of JH is, in many insects,

to regulate the production of eggs in the

female's ovaries.

Because mating behavior is oftensynchronized with the ovarian cycle, it

makes sense for mating behavior and

pheromone production to be linked with JH.

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Methyl farnesoate

CAS methyl

(2E,6E)-3,7,11-trimethyl-2,6,10-dodecatrienoate

Formula: C16H26O2

Juvenile hormone 0 (found in Lepidoptera)CAS methyl

(2E,6E)-10R,11S-(oxiranyl)-3,7-diethyl-11-methyl-2,6-

tridecadienoate

Formula: C19H32O3

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Juvenile hormone I (found in Lepidoptera)

CAS methyl

(2E,6E)-10R,11S-(oxiranyl)-7-ethyl-3,11-dimethyl-2,6-tridecadienoate

Formula: C18H30O3

Juvenile hormone II (found in Lepidoptera)

CAS methyl(2E,6E)-10R,11S-(oxiranyl)-3,7,11-trimethyl-2,6-tridecadienoate

Formula: C17H28O3

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Juvenile hormone III [17]

CAS methyl

(2E,6E)-10R-(oxiranyl)-3,7,11-trimethyl-2,6-dodecadienoate

Formula: C16H26O3

Juvenile hormone JHB3 [18] (found in diptera)

CAS methyl(2E,6E)-6S,7S,10R-(dioxiranyl)-3,7,11-trimethyl-2-dodecaenoate

Formula: C16H26O4

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The most common form is JH III , which is

structurally-

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Since juvenile hormone plays a very

important role in the life cycle of insects, it

can be used in various ways

1) In pest control,usually incorporated as a

part of IPM programs.

2) For control of insect-spread diseases like

malaria (via production of sterilemosquitoes).

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Juvenile Hormone plays a significant role in

the life cycle of an insect.

Economic losses incurred due to pest attackcan be successfully avoided with the use of

JH.

Several human diseases spread through

insects can also be effectively controlledusing JH.

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Journal Of Insect Science (Vol: 8)

www.plosone.org

www.wikipedia.org