Abstract
IN several reports on the introduction of Aphelinus mali into New Zealand and its colonisation, Dr. R. J. Tillyard has stated that by crossing three different strains from America he has produced a more vigorous strain which is now established over the greater part of New Zealand. To quote from one of his articles—“The story of how the three strains of Aphelinus were crossed, producing the very vigorous strain which is now being distributed all over New Zealand, is too long to tell in detail here, but the main points may be mentioned.”
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MUIR, F. The Evidence for Hybrid Vigour in Insects. Nature 121, 56 (1928). https://doi.org/10.1038/121056a0
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DOI: https://doi.org/10.1038/121056a0
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