Natural and synthetic materials with insect hormone activity

Development ◽  
1968 ◽  
Vol 20 (1) ◽  
pp. 25-31
Author(s):  
P. Masner ◽  
K. Sláma ◽  
V. Landa
Keyword(s):  
Embryonic Development ◽  
Juvenile Hormone ◽  
Abnormal Development ◽  
Hormone Activity ◽  
Pyrrhocoris Apterus ◽  
Synthetic Materials ◽  
Juvenile Hormone Analogues ◽  
Insect Metamorphosis ◽  
Juvenile Hormone Activity ◽  
Imaginal Differentiation

The juvenile hormone of insects is known to inhibit the process of insect metamorphosis. It is also known to stimulate ovarian growth in adult females of some species. It has been found recently that some substances with juvenile hormone activity also influence embryonic development. In the bug Pyrrhocoris apterus such substances, which prevent imaginal differentiation in metamorphosis, also affect the differentiation process of embryos at a certain stage of egg development (Sláma & Williams, 1966). This has been confirmed with other juvenile hormone analogues on embryonic development of silkworm eggs (Riddiford & Williams, 1967) and grasshoppers (Novák, 1967). According to the above observations eggs treated with the substances show abnormal development of the embryos, which may pass successfully through the early stages of embryogenesis but are unable to complete differentiation. Usually the embryos do not develop beyond the stage of blastokinesis and die within the egg shells.

Synthesis and Activity of Juvenile Hormone Analogues (JHA)

1988 ◽  
Vol 43 (8) ◽  
pp. 1038-1042 ◽  
Author(s):  
Juan B. Rodriguez ◽  
Eduardo G. Gros ◽  
Angel M. Stoka
Keyword(s):  
Juvenile Hormone ◽  
Functional Groups ◽  
Oxidation State ◽  
Triatoma Infestans ◽  
Hormone Activity ◽  
Carbonate Group ◽  
Active Compounds ◽  
Juvenile Hormone Iii ◽  
Juvenile Hormone Analogues ◽  
Juvenile Hormone Activity

AbstractFrom geranylacetone and by the use of a variety of reagents, twelve analogues of the juvenile hormone III were synthesized. The compounds (5-16) have an isoprenic structure bearing at the extreme of the chain functional groups as carbonate, carbamate, thiolcarbonate, thiolcarbamate, carbonyloxyimino and thiol carbonyloxyimino. Compounds 5-9 present the normal unsaturated isoprenic chain while compounds 10-16 have a monoepoxide function. All the compounds were tested for their respective juvenile hormone activity for Triatoma infestans and Rhodniusprolixus. The most active compounds were those having a thiol carbonate group independently of the oxidation state of the molecule. The synthetic procedures and the biological results are discussed.

BLOCKING OF EMBRYONIC DEVELOPMENT IN THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE), BY SOME COMPOUNDS WITH JUVENILE HORMONE ACTIVITY

1970 ◽  
Vol 102 (12) ◽  
pp. 1592-1596 ◽  
Author(s):  
Arthur Retnakaran
Keyword(s):  
Embryonic Development ◽  
Juvenile Hormone ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Dosage Level ◽  
Egg Mass ◽  
Hormone Activity ◽  
Juvenile Hormone Activity ◽  
Effect Of Treatment ◽  
Embryonic Death

AbstractThe effect of treatment with juvenile hormone and five of its analogs on embryonic development of the spruce budworm was studied. All compounds were applied topically in acetone solution to budworm egg masses, and all were found to have ovicidal activity. Most active was the dichloro analog, which required a minimum dosage of 50 μg per egg mass to ensure embryonic death in all the treated eggs. A similar result was found for juvenile hormone, while juvabione, ethyl-aromatic terpenoid ether, and farnesyl methyl ether required a dosage of 100 μg per egg mass to achieve this result. At this latter dosage level, 6% of the eggs treated with methyl aromatic terpenoid ether hatched.

scholarly journals Juvenile Hormone Activity of Juvabione Analogues against Pyrrhocoris apterus(Hemiptera:Pyrrhocoridae)

1993 ◽  
Vol 28 (1) ◽  
pp. 118-121 ◽  
Author(s):  
Kenzo KAWAI ◽  
Chika TAKAHASHI ◽  
Atsushi NUMATA ◽  
Sergey CHERNYSH ◽  
Alexandr NESIN ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Hormone Activity ◽  
Pyrrhocoris Apterus ◽  
Juvenile Hormone Activity

Synthesis and Activity of Juvenile Hormone Analogues (JHA), Part II

1989 ◽  
Vol 44 (8) ◽  
pp. 983-987 ◽  
Author(s):  
Juan B. Rodriguez ◽  
Eduardo G. Gros ◽  
Angel M. Stoka
Keyword(s):  
Juvenile Hormone ◽  
Functional Groups ◽  
Triatoma Infestans ◽  
Hormone Activity ◽  
Juvenile Hormone Analogues ◽  
Juvenile Hormone Activity ◽  
Derivatives Of

Several derivatives of 4-phenoxyphenoxy-ethyl and 4-phenoxyphenylethyl bearing carbonate and thiolcarbonate as functional groups were synthesized. The products were tested for their respective juvenile hormone activity for Triatoma infestans. None of them showed an activity comparable to that of Fenoxycarb which was used as the standard control. The synthetic procedures and the biological results are discussed.

Hypermetabolic Response Induced by Juvenile Hormone Analogues in an Insect

1979 ◽  
Vol 34 (7-8) ◽  
pp. 599-607 ◽  
Author(s):  
Karel Sláma ◽  
Ilona Kryspin-Sørensen
Keyword(s):  
Juvenile Hormone ◽  
Larval Instar ◽  
Somatic Growth ◽  
Dietary Fatty Acids ◽  
Hormone Activity ◽  
Consumption Values ◽  
Juvenile Hormone Analogues ◽  
Juvenile Hormone Activity ◽  
Living Organisms ◽  
Metabolic Water

Some synthetic analogues of insect juvenile hormone cause tremendous rise of respiratory me­tabolism in the last larval instar of Dermestes maculatus. The O2 consumption values occasionally found in these hypermetabolic larvae (20 ml/g/h) can be classified among the most intensive res­piratory rates ever recorded in living organisms. The phenomenon is directly related to the dose of juvenile hormone activity and it is dependent on nutrition. The mechanism of such specific meta­bolic action of juvenile hormone is based on complete oxidation of the dietary fatty acids, provid­ing metabolic water for larval somatic growth. The excessive amounts of energy created by hy­permetabolism are partly converted to heat, suggesting uncoupling of phosphorylation. Some other specific endocrmological features associated with hypermetabolism have been discussed.

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