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Development of superfluous soldiers induced by juvenile hormone analogues in the termite,Reticulitermes lucifugus santonensis

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Résumé

L'hormone juvénile synthétique: 17% alltrans+83%trans, trans, cis-méthyle 10-epoxy-3,7,11-triméthyle-2,6 tridecadienoate et l'analogue de l'hormone juvénile: méthyle 10-chloro-3,7,11-triméthyle-2 dodecenoate et éthyle 10-epoxy-3,7,11-triméthyle-2,6-dodecadienoate, qui ont été administrés amenés sur papier filtre à de petits groupes de termitesReticulitermes lucifugus santonensis Feyt., ont causé une différenciation de larves et de pseudergates en présoldats et/ou intermédiaires pseudergate-soldat. A la différence du rapport de 1 soldat à 100–300 autres individus dans des colonies normales, on assiste sous l'effet de la substance testée avec effet d'hormone juvénile à l'apparition d'un grand nombre de soldats en surplus, dont le nombre peut même dépasser celui des autres individus. Le trouble de l'équilibre entre les castes conduit à un taux de mortalité supérieur des termites.

Summary

The synthetic juvenile hormone (JH): 17% alltrans+83%trans, trans, cis-methyl 10-epoxy-3,7,11-trimethyl-2,6 tridecadienoate and juvenile hormone analogues (JHA): methyl 10-chloro-3,7,11-trimethyl-2 dodecenoate and ethyl 10-epoxy-3,7,11-trimethyl-2,6-dodecadienoate administered on filter paper to small groups of the European subterranean termiteReticulitermes lucifugus santonensis Feyt. caused differentiation of larvae and pseudergates into pre-soldiers and/or pseudergate-soldier intercastes. In contrast to the proportion of one soldier to 100–300 other individuals in normal colonies, the effect of the compounds tested that showed JH activity was to induce the development of a large number of superfluous soldiers in quantities that even exceeded the number of other kinds of individuals. Such a disturbance in the caste ratio leads to increased mortality.

Zusammenfassung

Das synthetische Juvenilhormon (JH): 17% alltrans+83%trans, trans, cis-Methyl 10-epoxy-3,7,11-trimethyl-2,6 tridecadienoate und die Juvenilhormonanaloge (JHA): Methyl 10-chloro-3,7,11-trimethyl-2 dodecenoate und Ethyl 10-epoxy-3,7,11-trimethyl-2,6-dodecadienoate, die auf Filterpapier kleinen Termitengruppen der europäischen ErdtermitenartReticulitermes lucifugus santonensis Feyt. zugeführt wurden, verursachten eine Differenzierung von Larven und Pseudergaten in Vorsoldaten und/oder Interkasten Pseudergate-Soldat. Zum Unterschied vom Verhältnis ein Soldat zu 100 bis 300 anderen Individuen in normalen Kolonien erscheint unter der Einwirkung der getesteten juvenilhormonwirksamen Stoffe eine grosse Menge überzähliger Soldaten, deren Anzahl jene der übrigen Individuen sogar übersteigen kann. Die Gleichgewichtstörung zwischen den Kasten hat eine höhere Absterberate der Termiten zur Folge.

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Authors and Affiliations

  1. Institute of Entomology, Czechoslovak Academy of Sciences, Viničná 7, Praha 2, Czechoslovakia

    I. Hrdý & J. Křeček

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  1. I. Hrdý
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  2. J. Křeček
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Dedicated to Prof.K. Gösswald at the occasion of his 65th birthday.

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Hrdý, I., Křeček, J. Development of superfluous soldiers induced by juvenile hormone analogues in the termite,Reticulitermes lucifugus santonensis . Ins. Soc 19, 105–109 (1972). https://doi.org/10.1007/BF02224728

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