Definition of heteroecious in US English:



  • Parasitic on different and often unrelated species of host at different stages of life.

    Compare with homoecious
    • ‘Control of a heteroecious rust will involve two hosts and their proximity to each other.’
    • ‘The other Chrysomyxa needle rusts are heteroecious and require more than one host to complete their life cycles.’
    • ‘Most heteroecious aphids have just one primary and one secondary host.’
    • ‘This allows rapid asexual spread during a single growing season and also enables a heteroecious species to persist on one host, even when its other host is not present.’
    • ‘Puccinia gladioli is a heteroecious rust of quarantine significance for the U.S.’