Control of the Citrus Mealybug with Insect Growth Regulators with Juvenile Hormone Activity13

Staal, Gerardus B.; Nassar, S. G.; Martin, Jonathan W.

doi:10.1093/jee/66.4.851

Cited by 22 publications

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“…SOllie time ago kinoprene (XXVIl) displayed promising activities against Homoptera, as descnbed by Henrick and co-workers so , Hrdy3 or Staal and co-workers. 66 The synthesis of 2,4-unsaturated secondary alcohols 67 X X VIlI a -X X V/J I c also proved promising results, where just the derivatives containing a cyclohexane cycle (XXVIIIc) in the molecule displayed a high activity in tests with the yellow mealworm (Tenebrio molitor). The compounds containing a five-membered cycle in the molecule were synthetized by Wawrzenczyk and co-workers 6o ,68.…”

Section: Aliphatic Luvenoidsmentioning

confidence: 99%

Insect juvenile hormones and their bioanalogues

Wimmer

Romaňuk

1989

Collect. Czech. Chem. Commun.

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This survey supplements and up-dates review articles of other authors published in the field of substances affecting the development of the insect, juvenoids. Attention has been paid primarily to such structures as deserved more detailed investigation in the given field owing to their biological properties, further to less known structures and facts, and lastly to the most recent information from literature, mainly paying attention to the present trend in searching for structural types of substances affecting insect development. The synthetic juvenoids discussed are divided into chapters, on the basis of the skeleton of the molecule, on aliphatic juvenoids, juvenoids with one aromatic ring in the molecule and finally juvenoids with two and more cycles (aromatic as well as non-aromatic) in the molecule. Certain attention has also been paid to optically active juvenoids. Finally the role is mentioned of complex hormonogen compounds, juvenogens, in the protection of cultured plants against economically important insect pests.

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Section: Aliphatic Luvenoidsmentioning

confidence: 99%

Insect juvenile hormones and their bioanalogues

Wimmer

Romaňuk

1989

Collect. Czech. Chem. Commun.

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“…JHA I was the most toxic JHA to the grain beetles; reduction of S. oryzae treated with this was 91.7%, R. dominica on the other hand, completely failed to reproduce. Staal (1973) reported that JHAs are not toxic to most adults of different species of insects. Reduction in adult emergence was 35% for the rice weevil, and 48% for the lesser borer grain beetle.…”

Section: Grain Beetlesmentioning

confidence: 99%

Synthetic Juvenile Hormone Analogues Against Four Species of Stored Products Beetles

Mkhize¹

1988

Int. J. Trop. Insect Sci.

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Juvenile hormone analogues (JHAs), JHA I (6,7'-epoxy-3',7'-dimethyl-dec-2'-enyl 6-ethyl-3pyridyl ether), JHA II (3',7'-dimethyl-undec-2,6'-dienyl 6-ethyl-3-pyridyl ether), MV-678 (2-methoxy-9-[4-isopropyl phenyl]-2, 6-dimethylnonane), and R-20458 (4-ethylphenyl-6, 7'-epoxy-geranyl ether) in acetone solution were applied to insect diets at lOppm (v/v), and their effects on four species of stored products beetles observed. The larvae of the flour beetles, Tribolium confusum Jacquelin duVal, and Tribolium castaneum (Herbst), reared in media treated with JHAs I and II failed to pupate. At the end of the 6-week observation period, these larvae had not yet pupated. MV-678 and R-20458 produced ecdysial failures, lethal morphological abnormalities and larval/pupal and pupal/adult intermediates. Only a few apparently normal adult flour beetles emerged from these treatments. The lesser borer grain beetle, Rhizopertha dominica (Fabricus), completely failed to reproduce in a medium treated with JHA I. JHA II, MV-678 and R-20458 affected the reproduction of the two grain beetles, R. dominica and Sitophilus oryzae (L.), to varying extent, with MV-678 being the least potent JHA.Resume-Hormones juveniles analogues (JHAs), JHA I (6,7'-epoxy-3', 7'-dimethyl-dec-2-enyl 6-ethyl-3pyridyl ether), JHA II (3',7'-dimethyl-undec-2,6'-dienyl 6-ethyl-3-pyridyl ether), MV-678 (2-methoxy-9-[4-isopropyl phenyl]-2, 6-dimethylnonane), and R-20458 (4-ethylphenyl-6, 7'-epoxy-geranyl ether) dans un solution d'acetone ont applique a la nourriture d'insecte, a dix 10 ppm (v/v), et leur consequence sur 4 especes d'insectes products qui ont reserves ont observes. La larvae d'escarbots de la fanire Tribolium confusum Jacquelin duVal, ont Tribolium castaneum (Herbst), qui onto cultivees dans milieu, traiteraient avec melanger un et deux ont faillies de changer dans une nymphe. Au fin d'un observation qui a pris 6 semaines, ces larves navaiet pas encore chargees. MV-678 ent R-20458 ont produit faillir mues, morphologie mortel et anormal; et intermediaries. Apparement seulement un peu adultes escarbots de la farine, qui etaient normal, ont emergees de ces traitements. Le petit foreur escarbot de grains (Rhizopertha dominica) Fabricus a failli completement de reproduire, dans un milieu qui a traite avec JHA I. JHA II, MV-678 et R-20458 ont alteres le reproduction due 2 escarbots de grains, R. dominica et Sitophilus oryzae (L.), dans une certaine mesure, avec MV-678 qui etait le moindre puissant JHA.

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“…However, the results of the treatment of E. insulana larvae with ZR-777 are particularly interesting since larvae of the 2 younger instars were found to be more sensitive to this compound than the older larvae. A compound structurally analogous to the insect juvenile hormone would be expected to be more effective against the last instar of the lepidopterous larvae (CAWICH et al 1973 NASSAR et al (1973) andSTAAL et al (1973) suggested that in addition to having a more common juvenile hormone like action on the metamorphosis in the greenbug and the citrus mealybug, ZR-777 had a new mode of action. They reported that this compound was more lethal to the younger stadia of these homopterous insects.…”

Section: Ill Hussain and A Askarimentioning

confidence: 99%

Effect of three juvenile hormone mimics on the development of Earias insulana Boisduval (Arctiidae, Lepidoptera)

Hussain

Askari

1975

Zeitschrift für Angewandte Entomologie

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Three juvenile hormone mimics, Altosid (isopropyl 11‐methoxy‐3,7,11‐trimethyl‐2,4‐dodecadienoate), Altozar (ethyl 3,7,11‐trimethyl‐2,4‐dodecadienoate) and ZR‐777 (prop‐2‐ynyl 3,7,11‐trimethyl‐2,4‐dodecadienoate) were topically applied to the thorax of 2nd to 5th instars of Earias insulana Boisduval to deposit a dose of 1 or 10 μg/larva. The effects of these compounds on the growth process included a varying degree of morphogenetic activity in the immature stages, larval mortality, inhibition of adult emergence from pupae, and formation of abnormal looking adults. Second and 3rd instars were killed with 10 μg/larva dose of ZR‐777 while an equal dose of the other two compounds was ineffective against these instars. Altosid was the most effective compound in inhibition of the adult emergence from pupae. The 5th instars were more susceptible than the younger larvae to the effect of Altosid at both the concentrations used and of Altozar at the higher concentration. Zusammenfassung Wirkungen von drei Juvenilhormonanalogen auf die Entwicklung von Earias insulana Boisd. (Lep., Arctiidae) Die drei den Juvenilhormonen ähnlichen Substanzen Altosid, Altozar und ZR‐777 wurden in Dosen von 1 und 10 μg pro Larve auf den Thorax der L2 bis L5 von E. insulana appliziert. Als Folgen traten auf: Abnahme der morphogenischen Aktivität der Entwicklungsstadien, Zunahme der Larvenmortalität, Unterdrückung des Falterschlüpfens sowie Entstehung anomaler Falter. Das zweite und dritte Larvenstadium wurden mit 10 μg ZR‐777 pro Larve abgetötet, während die zwei anderen Substanzen in gleicher Dosis gegen diese Stadien unwirksam waren. Unter dem Einfluß von Altosid wurde das Falterschlüpfen aus den Puppen am stärksten verhindert. Hinsichtlich der Wirkung von Altosid in beiden Konzentrationen sowie von Altozar in der höheren Konzentration zeigten sich die Altlarven (L5) empfindlicher als jüngere Larven.

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Control of the Citrus Mealybug with Insect Growth Regulators with Juvenile Hormone Activity13

Cited by 22 publications

References 0 publications

Insect juvenile hormones and their bioanalogues

Insect juvenile hormones and their bioanalogues

Synthetic Juvenile Hormone Analogues Against Four Species of Stored Products Beetles

Effect of three juvenile hormone mimics on the development of Earias insulana Boisduval (Arctiidae, Lepidoptera)

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