from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various insects, such as the ichneumon fly, whose larvae are parasites that eventually kill their hosts.
- adj. Of or relating to a parasitic insect of this kind.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any organism that is parasitic during part of its life cycle, especially one that eventually kills its host.
from The Century Dictionary and Cyclopedia
- Same as parasitic.
Most biologists use the term parasitoid to refer only to insects with this type of life history, but some argue the term should be used more embrasively to include parasitic nematodes, seed weevils, and certain bacteria and viruses (e.g., bacteriophages), all of which obligately destroy their host.
Moreover, natural enemies such as parasitoid wasps and ants are likely to increase their abundances and activity rates if summer temperature rises.
The wasp also became interesting for sciencists because its cells tend to contain their own 'parasitoid'"Wolbachia" bacteria.
For example, among the 70,000 or so known parasitoid and other apocritan Hymenoptera, one of the largest orders of insects, all of whom are haplodiploid, no eusocial species has been found.
/Biological control of aphids in small grains by parasitoid wasps.
We learn, for instance, that the only creature on Earth that can rival humans for directional hearing is a humble parasitoid fly called Ormia Ochracea.
There is also a tendency for enhanced UV-B radiation levels to increase the immunocompetence of the caterpillars, which could possibly make them more tolerant to the wasp parasitoid .
Finally, higher temperatures and drought can shift the timing of budworm reproduction so that natural parasitoid predators are no longer effective in limiting budworm numbers .
As this virus and the parasitoid wasp '' Cotesia jucunda '' are both important controllers of the survival of moth caterpillars, increased UV-B radiation levels could possibly lead to increased moth populations and birch forest defoliation.
The coevolution of host resistance and parasitoid virulence.