, Volume 10, Issue 1, pp 83–96 | Cite as

Les Trichogrammes parasites deProceras sacchariphagusBoj., borer de la canne a sucre a Madagascar

Première partie Écologie deTrichogramma australicumgir. parasite autochtone Effets du renforcement de la population parasite
  • J. Brenière


Trichogramma australicum is egg parasite of theProceras sacchariphagusBoj., borer of the sugar cane in Madagascar.

The complex of theProceras parasites and the dynamic of theProceras andTrichogramma populations are studied under the natural conditions of the North-Western part of Madagascar. An experiment of strenghening theTrichogramma population was undertaken in 1960. The release of over 2 million parasites on a field of 10 ha shows that the influence of a very importantTrichogramma overcharge is obvious but of short duration. The dispersion occurs quickly and the influence on the borers'damages is not evident.

On the other hand, the rate of natural parasitism increases very fast as soon the host population increases, whatever the importance of the initial parasite population.

The author thinks there is little hope for the method ofTrichogramma reinforcement being used in Madagascar under existing conditions.


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Copyright information

© Le François Editeur Paris 1965

Authors and Affiliations

  • J. Brenière
    • 1
  1. 1.Institut de Recherches agronomiques à Madagascar, I.R.A.T.Madagascar

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