See Onion for a more detailed discussion of these diseases.
Symptoms appear as wilting and a slow or rapid collapse of the plant.
The bulb can appear brown and water-soaked instead of white and firm. Control can be achieved by using a two-year rotation with nonsusceptible plants, such as corn, to prevent the buildup of pathogenic organisms. Insect Problems Garlic is susceptible to onion insects, except onion maggot. This little springtail may occasionally damage young seedling garlic. Lesser bulb fly, Eumerus tuberculatus .