SOLVING GARLIC PROBLEMS
Garlic is rarely damaged by insects.
Diseases
Most garlic diseases are either soil- or seed-borne and usually can be controlled with proper rotation and planting disease-free seed. The most common diseases include:
Botrytis.
This fungus attacks garlic leaves following periods of warm, wet weather and bulbs in storage. Symptoms include water-soaked stems, which is why the disease is often called "neckrot." In severe infections, the bulbs may rot. In mild infections, the disease may not be noticed during the season, but may attack the bulb during storage.