L‐CANAVANINE, AN ANTIGONADAL SUBSTANCE FOR <i>DYSDERCUS KOENIGII</i>

Koul, Opender

doi:10.1111/j.1570-7458.1983.tb03338.x

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…The surface dosage ranged between 0.15-1.50 ~g/cm 2. The eggs (freshly oviposited) and third, fourth and fifth stage (freshly ecdysed) Dysdercus larvae were confined in these petri dishes till adulthood and provided with normal food and water as described earlier (Koul, 1983). 2.…”

Section: Methodsmentioning

confidence: 99%

Azadirachtin: I‐interaction with the development of red cotton bugs

Koul¹

1984

Entomologia Exp Applicata

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Azadirachtin, a material isolated from Azadirachta indica A. Juss, was applied to various stages of red cotton bugs (Dysdercus koenigii F.). The phytochemical evoked various specific and nonspecific effects during the course of development. Prolonged development, wing deformities, unplasticisation of wing lobes, development of wingless adults and larval mortality were the characteristic features. RÉSUMÉ Azadirachtine d'Azadirachta indica I: Interaction avec de développement de Dysdercus koenigii L'azadirachtine, isolǎt de Azadirachta indica A. Juss a été utilisée (par traitement du substrat ou par dépǒt sur l'insecte) sur un hétérométabole, Dysdercus koenigii F. Cette substance phytochimique provoque divers effets, spécifiques ou non, pendant le développement. Les modifications caractéristiques sont: un développement prolongé, de déformations alaires, une absence de plastification des bourgeons alaires, une production d'adultes sans ailes et une mortalité nymphale. De tels résultats suggèrent des études complémentaires pour mettre en évidence une hormone d'éclosion chez D. koenigii avec laquelle interférerait l'azadirachtine.

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Section: Methodsmentioning

confidence: 99%

Azadirachtin: I‐interaction with the development of red cotton bugs

Koul¹

1984

Entomologia Exp Applicata

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“…Canavanine causes lethal morphological malformations in tobacco hornworm pupae, by this mechanism Rosenthal, 1986). It also causes sterility in adult migratory locusts, Locusta migratoria migratorioides (Orthoptera: Acrididae) (Pines et al, 1981) and in adult Dysdercus koenigii (Hemiptera: Pyrrhocoridae) (Koul, 1983).…”

Section: Amino Acidsmentioning

confidence: 99%

Molecular Aspects of Insect-Plant Associations

Brattsten¹,

Ahmad²

1987

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All rights reservedNo part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher PREFACE Thanks to the meticulous and enthusiastic work of insect collectors and taxonomists over the past hundred years and more, we have today a large amount of information on the feeding habits and life styles of several hundred thousands of insect species.Insects that feed on plants during at least one of their life stages constitute about half of the three-quarters of a million described species. Their numbers both in terms of species and individuals together with their small but macroscopic sizes makes the insect-plant biological interface perhaps the most conspicuous, diverse and largest assemblage of intimate interspecies interactions in existence. It is also perhaps the most important biological interface because of the plants' role as primary producers upon which all other forms of earthly life depend, thereby bringing herbivorous insects occasionally into direct competition with human food and fiber production.Early enthusiasm revealed many remarkable specializations and associations between insects and plants, and occasionally assigned chemical mediators for them. However, the modern practices of large scale crop protection by synthetic pesticides and their attendant problems, particularly with resistance in "pests" and destruction of natural enemies, have been in large measure responsible for drawing our attention to the mechanisms whereby plants control insect populations and insects adapt to the plants' defenses.These practices have also brought home the importance of chemical mediators in practically all aspects of insect activities and, in particular, the importance of plant allelochemicals in maintaining and balancing insect-plant associations.There are about 20,000 identified allelochemicals to date, estimated to be between ten and 50 percent of all possible such non-nutrient chemicals.Most of these have biological activity, mostly uncharacterized, when accumulated in sufficiently high concentrations.Many are acutely toxic to insects and other animals. A few have been used successfully for insect control and as drugs; more importantly, however, plant allelochemicals continue to provide model structures for the development of synthetic insecticides and drugs.With the recent availability of high-resolution analytical instruments, natural history is rapidly turning into a modern, multidisciplinary biological science. The elucidation of the mechanisms which maintain the observed ecological equilibria in the insect-plant interface provide fascinating work and rich intellectual rewards. It is also necessary to understand these interactions for purposes of local food and fiber production, the premise being that understanding the molecular details of insect adaptations to plant allelochemicals may allow manipulations of those mechanisms for crop protec...

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Fate of Ingested Plant Allelochemicals in Herbivorous Insects

Brattsten

1986

Molecular Aspects of Insect-Plant Associations

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L‐CANAVANINE, AN ANTIGONADAL SUBSTANCE FOR DYSDERCUS KOENIGII

Cited by 7 publications

References 9 publications

Azadirachtin: I‐interaction with the development of red cotton bugs

Azadirachtin: I‐interaction with the development of red cotton bugs

Molecular Aspects of Insect-Plant Associations

Fate of Ingested Plant Allelochemicals in Herbivorous Insects

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