Topic
Hyperparasite
About: Hyperparasite is a research topic. Over the lifetime, 222 publications have been published within this topic receiving 3132 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: The similarity between host suicide and the passage of group 4 parasites from intermediate hosts to definitive hosts is noted, and the possible role of host suicide in the evolution of such complex parasitic life cycles is examined.
Abstract: Parasites and their hosts show behavioral as well as physiological interactions. Parasites are able to alter the behavior of their hosts, and hosts in turn may employ behavioral retaliation in response to parasitic infection. The four types of endoparasites discussed in the paper are parasitoids (group 1), parasitic castrators (group 2), single-host true parasites (group 3) and multihost true parasites (group 4). For each of these four types of parasites the role of parasite induced modifications of host behavior is analyzed with respect to (1) dispersal of the parasite propagules to new hosts, (2) modification of the host's energy budget to provide energy for the parasite's growth and maturation, and (3) keeping the host alive until the parasite has completed its life cycle. It is found that modification of the host's energy budget is profitable for parasitoids and castrators, but not for group 3 parasites. During some stages of its life cycle the group 4 parasite can employ modification of the host's en...
122 citations
TL;DR: Sclerotia produced in agar culture are markedly more resistant to infection than those grown on autoclaved carrots and application of inoculum in the form of pycnidial dust to sclerotinia placed on compost results in high levels of infection.
Abstract: Coniothyrium minkans is a hyperparasite of sclerotia of Sclerotinia sclerotiorum and, S. trifoliorum known from the U.S.A., Europe and New Zealand. Its host range in culture includes Sclerotinia minor and some strains of Botrytis cinerea, B. fabae and Sclerotium cepivorum . Inoculation experiments and general observations indicate that it is not pathogenic to green plants. The optimum temperature for growth on agar and for infection of S. sclerotiorum sclerotia is 20 ° but good growth and parasitism occur at 10 ° . Using a standardized infection test with a comparatively low concentration of C. minkans spores great variability is demonstrated in the susceptibility of different isolates of S. sclerotiorum . Sclerotia produced in agar culture are markedly more resistant to infection than those grown on autoclaved carrots. Application of inoculum in the form of pycnidial dust to sclerotia placed on compost results in high levels of infection.
104 citations
TL;DR: Sensory deprivation experiments involving partial removal of the antennae suggest that these terminal structures are the sense organs primarily responsible for receiving stimuli from the secondary host.
Abstract: Cheiloenurus noxius Compere, a hyperparasite of unarmored scale insects, lays its eggs within the bodies of primary parasites of these scales. The location and structure of female sense organs, involved in discrimination secondary (scale) hosts, was investigated. Scanning electron micrographs showed that sensilla at the tips of the antennae were morphologically distinct from those more proximally situated. Sensory deprivation experiments involving partial removal of the antennae suggest that these terminal structures are the sense organs primarily responsible for receiving stimuli from the secondary host.
82 citations
TL;DR: The phylogenetic analyses based on 5-locus data strongly support that this fungus is a distinct species in the genus Polycephalomyces.
Abstract: A new species, Polycephalomyces agaricus, which is parasitic on Ophiocordyceps sp., a pathogen of melolonthid larvae in southwestern China, is described using morphological and phylogenetic evidence. This species differs morphologically from other species in the genus by its agaric-shaped synnemata, pileus-like slimy masses on short stipes, globose to subglobose α-conidia, and plenty of laterally or apically proliferating phialides. The phylogenetic analyses based on 5-locus (nrSSU, nrLSU, tef-1α, rpb1, and rpb2) data strongly support that this fungus is a distinct species in the genus.
78 citations
TL;DR: Application of conidial suspensions of the hyperparasite Ampelomyces quisqualis to greenhouse cucumbers inoculated with Sphaerotheca fuliginea increased cucumber yield compared with an untreated control.
Abstract: Application of conidial suspensions of the hyperparasite Ampelomyces quisqualis to greenhouse cucumbers inoculated with Sphaerotheca fuliginea increased cucumber yield compared with an untreated control. Similar yield increases were obtained with triforine and also when a reduced rate of triforine and the hyperparasite were combined. A. quisqualis extensively parasitized S. fuliginea and also, in experiments with commercial cucumber crops, Erysiphe cichoracearum.
72 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 6 |
| 2019 | 3 |
| 2018 | 1 |
| 2017 | 3 |
| 2016 | 6 |
| 2015 | 4 |