| Négrette N is highly susceptible to gray rot, oidium, leafhoppers and mites. |
| Also to enable the oidium albicans to attack the mucous membrane there must be some slight inflammation or injury. |
| It is, however, highly sensitive to wood diseases such as eutypiosis and esca, as well as to oidium. |
| Muscat à Petits Grains Blancs is susceptible to oidium, gray mold and hymenoptera. |
| In this ripening there is a prompt development of a heavy viscous slime, which consists of oidium and bacteria. |
| This occurs very rapidly under the attack of oidium lactis accompanied by bacteria. |
