Take only one year to develop instead of the two years others require. Thus the absolute density of the mosquito may be controlled. This is most likely to occurr among tree hole mosquitoes or in those with restricted breeding areas. Insects are affected by many diseases. In genereal, disease conditions do not appear until populations are quite high.
Several diseases can be problems for social insects.
Several other honey bee diseases are also known. Diseases are a standing problem when one tries to mass rear insects for whatever reason. Several serious diseases of silkworms are known. Diseases favored by right environmental conditions. Fungi especially need humid and cool conditions to germinate, and fungal disease outbreaks tend to be most prevalent in cool rainy seasons.