0 a large number of animals and insects that carry disease, that are present where they are not wanted: --
an infestation of cockroaches/head lice
a flea infestation
Three days after the infestation, the number and weight of surviving aphids on each plant were recorded.
The snails were characterized and the prevalence of their infestation by schistosomes was investigated.
This was explained to the volunteers, and every single one expressed his willingness to submit to prolonged infestation with the itch mites.
These properties define the patch-specific longterm probability of occupancy or, in this case, the probability of an infestation being established and maintained.
Antibiosis was estimated as the biomass accumulated by each aphid species on each accession during infestation.
For this reason, reliance on insecticides as the sole means of managing infestations was considered at best a short term solution.
The result was that the abandoned fields served as permanent foci of infestation throughout the island.
Infestation-based discrimination among seeds is of great potential relevance for the population dynamics of the plants and the insects, as well as the vertebrates, involved.
