Moulting, growth and survival of Galleria mellonella L. (Lep., Pyralidae) treated with juvenoids

Ciemior, Krystyna E.; Sehnal, František; Schneiderman, Howard A.

doi:10.1111/j.1439-0418.1979.tb02518.x

Cited by 19 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results have also been observed with administration of juvenile hormone analogue (JHA), pyriproxyfen to larvae of Indian meal moth, Plodia interpunctella (Ghasemi et al 2010). Such postponement of larval-pupal or pupal-adult ecdysis or extension of the larval or pupal period may certainly be due to inhibition of the moulting process caused by an increase in the juvenile hormone titre in the insect body (Hangartner and Masner 1973;Lapcharoen et al 2005) which is responsible for direct inhibition of prothoracic glands or modification of the prothoracicotropic brain activity (Ciemior et al 1979). There are two juvenile hormone (JH) sensitive periods during last larval instar.…”

Section: Discussionmentioning

confidence: 99%

Withania somnifera acts as a potential insect growth regulator in the polyphagous pest, Pericallia ricini

Gaur¹,

Kumar²

2018

Journal of Plant Protection Research

View full text Add to dashboard Cite

Both seed and root extracts of the medicinal plant, Ashwagandha, Withania somnifera exhibit insect growth regulatory activity against the polyphagous pest, Pericallia ricini. Topical administration of W. somnifera seed and root extracts to last instar larvae of P. ricini disrupted moulting and metamorphosis, leading to a number of developmental abnormalities such as delay in larval-pupal and pupal-adult ecdysis, formation of larval-pupal, pupal--adult and larval-pupal-adult mosaics/chimeras, ecdysial failure, suppression of pupation and adult emergence and formation of abnormal pupae and adultoids. The treatment with seed extracts was more severe than that of root extracts as it completely suppressed the pupation and adult emergence. The results clearly suggest that the medicinal plant, W. somnifera acts as a potential insect growth regulatory (IGR) disrupting the moulting and metamorphosis as a consequence of interference with the endocrine system.

show abstract

Section: Discussionmentioning

confidence: 99%

Withania somnifera acts as a potential insect growth regulator in the polyphagous pest, Pericallia ricini

Gaur¹,

Kumar²

2018

Journal of Plant Protection Research

View full text Add to dashboard Cite

show abstract

“…This is certainly the case in metamorphosing holometabola, which represent the majority of insects. Interestingly, most marine invertebrates also undergo a larval phase before metamorphosing into an adult, and, like insect metamorphosis, this has important nutritional consequences for their growth and development [31]. Indeed, those marine invertebrates best described by non-exponential functions did not undergo metamorphosis (Amphipoda and Ctenophora) or did not feed in the larval phase (Gastropoda) [32].…”

Section: Discussionmentioning

confidence: 99%

“…The absence of a physical limit that determines size in insects has been supported experimentally. Caterpillars chemically induced to enter an extra instar before pupation have been observed to continue their rapid growth trajectory beyond their usual terminal weight [31,35].…”

Section: Discussionmentioning

confidence: 99%

Testing mechanistic models of growth in insects

Maino

Kearney

2015

Proc. R. Soc. B.

View full text Add to dashboard Cite

Insects are typified by their small size, large numbers, impressive reproductive output and rapid growth. However, insect growth is not simply rapid; rather, insects follow a qualitatively distinct trajectory to many other animals. Here we present a mechanistic growth model for insects and show that increasing specific assimilation during the growth phase can explain the near-exponential growth trajectory of insects. The presented model is tested against growth data on 50 insects, and compared against other mechanistic growth models. Unlike the other mechanistic models, our growth model predicts energy reserves per biomass to increase with age, which implies a higher production efficiency and energy density of biomass in later instars. These predictions are tested against data compiled from the literature whereby it is confirmed that insects increase their production efficiency (by 24 percentage points) and energy density (by 4 J mg 21 ) between hatching and the attainment of full size. The model suggests that insects achieve greater production efficiencies and enhanced growth rates by increasing specific assimilation and increasing energy reserves per biomass, which are less costly to maintain than structural biomass. Our findings illustrate how the explanatory and predictive power of mechanistic growth models comes from their grounding in underlying biological processes.

show abstract

“…Die Hauptaktivitaten der Proteinsynthese und des Wachstums der Insektenlarven sind meist mit denjenigen Perioden verknupft, in denen J H wirksam ist. Die Erhohung des JH-Titers im letzten Larvenstadium fuhrte bei Galleria rnellonella durch Verlangerung der Frei3periode zu einem hoheren Larvenund Puppengewicht (SEHNAL 1971;CIEMIOR et al 1979). Bei Heliothis armigera wurde sogar eine Stimulation der Nahrungsaufnahme und damit eine grogere Wachstumsgeschwindigkeit beobachtet (FYTIZAS und MOURIKIS 1979).…”

Section: Einfluj? Auf Das Puppengewichtunclassified

Einfluß von exogenem Juvenilhormon auf die Larvalentwick‐lung und die Metamorphoseleistungen von Lymantria dispar L. (Lep., Lymantriidae)

Kallenborn

Mosbacher

1982

Zeitschrift für Angewandte Entomologie

View full text Add to dashboard Cite

Influence of exogenous juvenile hormone on larval development and metamorphosis in Lymantria dispar L. (Lepidoptera) By treating last instar larvae of Lymantria dispar with C16‐JH, different reactions, dependent on the age of the larvae were obtained. When injected during the 1st third of the last larval instar, this stage can be prolonged, for the most part, without preventing normal pupation. Injections made in the 2nd third do not delay the next ecdysis significantly, but lead to an increased development of larval‐pupal intermediates. In the case of injections made shortly before or during the prepupal phase there is a slight delay before normal pupae develop. By injection of C16‐JH supernumerary normal larvae can in no case be induced. Even after a maximal prolongation of the last larval instar the pupal weight is not essentially higher than that of untreated animals. The highest mortality of normal pupae is observed when injection is made towards the end of the last larval instar. Peanut oil used as solvent for the injection of C16‐JH has a slight JH‐like effect, moreover it can affect the fertility of the females. The intermediates caused by C16‐JH treatment are described and classified by larval and pupal characteristics. Zusammenfassung In Raupen von Lymantria dispar wurden am 1. bzw. 3., 5., 7. und 9. Tag des letzten Larvenstadiums 0,1 μl C16‐JH, gelöst in 2 μl Erdnußöl, injiziert. Die Injektionen im 1. Drittel des letzten Larvenstadiums führten zu einer deutlichen Verzögerung der Verpuppung; bei den Münnchen wurde eine Verlängerung des letzten Larvenstadiums um maximal 34% (bei Injektion in T3), bei den Weibchen um 25% (bei Injektion in T5) erreicht. Die anschließende Verpuppung verlief meist normal. Injektionen im 2. Drittel des letzten Larvenstadiums (bei den Männchen in T5 und T7, bei den Weibchen in T7 und T9) verzögerten die nächste Häutung nur wenig, hatten aber vermehrt die Ausbildung larval‐pupaler Zwischenformen zur Folge. Bei Injektionen kurz vor oder in der Vorpuppenphase (bei den Männchen in T9) entstanden nach geringfügiger Verzögerung normale Puppen. Normal gestalteteüberzählige Larven konnten in keinem Fall induziert werden. Auch nach einer maximal verlängerten Larvenzeit war das Puppengewicht nur wenig höher als bei den unbehandelten Kontrolltieren. Die höchste Sterblichkeitsrate bei den männlichen Puppen wurde nach JH‐Injektion in T7, bei den weiblichen Puppen nach Injektion in T9 beobachtet. Injektionen von reinem Erdnußöl hatten einen schwachen JH‐ähnlichen Effekt und konnten darüber hinaus die Fertilität der Weibchen beeinträchtigen. Die durch C16‐JH‐Injektionen hervorgerufenen larval‐pupalen Zwischenformen werden beschrieben und nach ihren larven‐ und puppenähnlichen Merkmalen in die Kategorien LPI‐LP IV und PL I‐PL IV klassifiziert. Die Ursachen für die Entstehung der Intermediärformen werden diskutiert; als wesentliche Faktoren werden begrenzte JH‐Empfindlichkeitsphasen der verschiedenen Organanlagen und unterschiedlich hohe Reaktionsschwellen gegenüber bestimmten JH‐Konz...

show abstract

Moulting, growth and survival of Galleria mellonella L. (Lep., Pyralidae) treated with juvenoids

Cited by 19 publications

References 21 publications

Withania somnifera acts as a potential insect growth regulator in the polyphagous pest, Pericallia ricini

Withania somnifera acts as a potential insect growth regulator in the polyphagous pest, Pericallia ricini

Testing mechanistic models of growth in insects

Einfluß von exogenem Juvenilhormon auf die Larvalentwick‐lung und die Metamorphoseleistungen von Lymantria dispar L. (Lep., Lymantriidae)

Contact Info

Product

Resources

About