31. Some strains do have a wide host range and should therefore be considered nonselective biological insecticides. 32. These investigations have also addressed the mechanisms by which new pathogens emerge with different host ranges . 33. This pest is very difficult to manage, largely due to its extensive host range and migratory capabilities. 34. Viruses also have a very large host range so it'd be harder to classify them that way. 35. The virus has a limited host range , and barley appears to be the only known susceptible host. 36. One of the viruses had a wide host range and was named " Southern celery mosaic ". 37. The virus has a wide host range . 38. They are plant viruses that as a group have a very wide host range , infecting dicotyledonous plants. 39. Comparisons of host range and reproduction among populations of " Belonolaimus longicaudatus " from North Carolina and Georgia. 40. The importance of this oomycete is its vast host range and the damage it causes to major crops.