Abstract
IN a previous communication1, Dr. Salt and Miss Laing asserted that individual females of Trichogramma evanescens avoid host eggs which have already received the attention of other individuals of the same species. In the experiment described, a parasite was allowed to walk on, but not to parasitise, some host eggs. The parasite was then removed, and clean eggs placed alternately with the others. A second parasite was introduced which ” avoided the hosts that had been visited by the first, as though they had already been parasitised”. From this is deduced that the sense of smell warns the parasites of those eggs which have received attention, so that they leave them alone.
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References
NATURE, 135, 792, May 11 (1935).
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KING, C. Discriminative Ability of a Parasitoid. Nature 137, 32–33 (1936). https://doi.org/10.1038/137032b0
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DOI: https://doi.org/10.1038/137032b0
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