"virus diseases" is correct and usable in written English.
For example, you could use the phrase in a sentence such as: "Many virus diseases, including the common cold, are caused by airborne particles."
He published a further 450 papers on "slow virus" diseases and ethnography.
"With all the animals in the wild," he said, "we really know so little about what virus diseases they have unless they get into livestock or humans".
This is especially true with respect to virus diseases, because it is almost impossible to free plants of virus infections and because most virus diseases are not transmitted by seed.
Furthermore, most plant virus diseases are transmitted by insect carriers, so control of insects is linked to control of disease.
"The world as a whole has a great stake in how we together respond to this global threat," she said, adding that "virus diseases, just like terrorism, know no national boundaries".
In 1937, Dennis moved to the Plant Virus Station at Cambridge to work on virus diseases of potatoes, and in 1939 was appointed as plant pathologist at the seed testing station at East Craigs, Edinburgh.
Prusiner had his problem: he would isolate and characterise the elusive infectious agent responsible for scrapie, which could be studied with rodents, and in so doing shed light on these so-called slow virus diseases.
Other seemingly related slow virus diseases included scrapie (which occurs in sheep) and kuru (found in the Fore people of Papua New Guinea and spread by cannibalism), all three causing a spongy degeneration of the brain and being transmissible to similar species via injection of infected brain tissue.
The only justification for the generalization that asexually propagated plants lack hardiness or sturdiness is the fact that virus diseases can be transmitted by asexual propagation and that most such diseases cannot be transmitted through seed.
In the past, air-borne virus diseases appeared to pose a serious health risk for large human populations.
Planting resistant cultivars is the most effective and economical way to control plant virus diseases.
