The effects of the juvenile hormone analogues on diapausingHalyomorpha halys, Megacopta cribraria andNezara viridula and associated hymenopteran egg parasitoids

Juvenile hormone analogues have been tested as insect growth regulators in silkworm (Bombyx mori), seeking an increment of silk production. These chemical products, when applied in small or moderate rates, promote the extension of the last larval instar. To understand the physiologic consequences on silk production by the silkworm strain C115 x N108, the application of methoprene, a juvenile hormone analogue, was performed to evaluate its effects on larval development and silk production. Methoprene was topically applied 48h after the fourth larval ecdysis, on the dorsal integument of the 2nd thoracic segment of the insects, at seven rates between 0 and 20 ng a.i. Methoprene influenced positively the duration of the fifth instar and the weight gain of the insects. The application of 1ng methoprene resulted in the heaviest silkglands, cocoons, shell cocoons and pupae weights. Comparatively to the control, the increment on silk production (approximately 24%) by the use of 1ng methoprene was more accentuated than the corresponding negative effects on the cocooning rate (approximately 12%).

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Effects of juvenile hormone mimics on the codling moth Cydia Pomonella (L.) (Lep., Olethreutidae)

Bulletin of Entomological Research ◽

10.1017/s0007485300050847 ◽

1973 ◽

Vol 63 (1) ◽

pp. 7-16 ◽

Cited By ~ 22

Author(s):

I. Gelbič ◽

F. Sehnal

Keyword(s):

Juvenile Hormone ◽

Laboratory Experiments ◽

Cydia Pomonella ◽

Codling Moth ◽

The Other ◽

Wide Range ◽

Juvenile Hormone Analogues ◽

Juvenile Hormone Mimics

AbstractLaboratory experiments with juvenile hormone analogues on Cydia pomonella (L.) showed that Cecropia C17 juvenile hormone (methyl 10,ll-epoxy-3,7,ll-trimethyl-2,6-dodecadienoate) was the most active of the 28 compounds tested. When applied to four-hour-old eggs at 0.1 μg/egg, the hormone caused 100% failure in embryogenesis, while the other compounds were at least five times less effective. Depending on the time since ecdysis and the dose, juvenile hormone mimics applied to last-instar larvae resulted in a wide range of intermediate forms. Against three-day-old last-instar larvae, the Cecropia C17 hormone gave 100% inhibition of development at a dose of 1 μg/larva, while three other compounds (methyl 10,11-epoxy-3,7,11-trimethyl-2,6-dodecadienoate, ethyl 11-chloro-3,7,11-trimethyl-2-dodecenoate and ethyl 3,7,11-tri-methyl-2,4-dodecadienoate) gave the same effect at 2–5 μg/larva. Against newly emerged adults, the last two compounds at 10–50 μg/insect reduced fecundity and fertility to 0–81% and 0–50%, respectively, of their normal levels.

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Effects of 5 Juvenile Hormone Analogues Applied Topically to Cattle Naturally Infested with Hypoderma Larvae (Diptera: Oestridae)1

Journal of Medical Entomology ◽

10.1093/jmedent/12.5.517 ◽

1975 ◽

Vol 12 (5) ◽

pp. 517-524

Author(s):

R. L. Younger ◽

J. E. Wright ◽

H. E. Smalley ◽

H. R. Crookshank ◽

J. O. Norman

Keyword(s):

Juvenile Hormone ◽

Juvenile Hormone Analogues

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PRELIMINARY STUDIES OF EFFECTS OF JUVENILE HORMONE ANALOGUES ON ADULT EMERGENCE OF BLACK FLIES (DIPTERA: SIMULIIDAE)

The Canadian Entomologist ◽

10.4039/ent105509-3 ◽

1973 ◽

Vol 105 (3) ◽

pp. 509-511 ◽

Cited By ~ 10

Author(s):

J. E. Cumming ◽

B. McKague

Keyword(s):

Juvenile Hormone ◽

Adult Emergence ◽

Complete Inhibition ◽

Black Flies ◽

Breeding Sites ◽

Juvenile Hormone Analogues ◽

Simulium Decorum

AbstractBreeding sites for Simulium venustum, Simulium arcticum, Simulium pugetense, Simulium hunteri, Simulium canadense, and Simulium decorum were found in the Vancouver area. Addition of juvenile hormone analogues to the rearing water of S. decorum resulted in virtually complete inhibition of adult emergence.

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Control ofCacopsylla (Psylla) pyri(L.) (Stenorhyncha, Psyllidae) by juvenile hormone analogues

Journal of Applied Entomology ◽

10.1111/j.1439-0418.1997.tb01417.x ◽

1997 ◽

Vol 121 (1-5) ◽

pp. 343-351 ◽

Cited By ~ 2

Author(s):

N. Baldassari ◽

P. Baronio ◽

V. Němec ◽

M. Rejzek ◽

Z. Wimmer

Keyword(s):

Juvenile Hormone ◽

Juvenile Hormone Analogues

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9. Structure - Juvenile Activity Relationships in simple Peptides

Zeitschrift für Naturforschung B ◽

10.1515/znb-1971-0716 ◽

1971 ◽

Vol 26 (7) ◽

pp. 719-722 ◽

Cited By ~ 8

Author(s):

Karel Poduška ◽

František Šorm ◽

Karel Sláma

Keyword(s):

Amino Acids ◽

Amino Acid ◽

Juvenile Hormone ◽

Specific Activity ◽

Hormonal Activity ◽

Aminobenzoic Acid ◽

The Family ◽

Juvenile Hormone Analogues ◽

Acid Ethylester

Systematic alterations of the central amino acid in the peptidic juvenile hormone analogues consisting of three parts connected by amidic bonds tert.-butyloxycarbonyl group - amino acid - p-aminobenzoic acid ethylester) have revealed that the hormonal activity is dependent on the L-configuration of the central amino acids. The compounds exhibit specific activity on insects of the family Pyrrhocoridae, being inactive on several other insects tested.

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