How to Manage Pests

Pests in Gardens and Landscapes

Onions and Garlic – Allium cepa and A. sativum
Family Amaryllidaceae (Amaryllis family)

Plant Description

Bulb and bunching onions (green onions) and garlic can be grown in home gardens. Varieties of onions are typically grouped by color and flavor. American onions are more pungent and European onions tend to be mild or sweet. The number of daylight hours required to bulb should be considered when planting onions. Garlic requires similar care and can be planted in most parts of California.

Cultural Tips

Cultural practices such as proper site selection, soil preparation, planting, and watering are important for plant health, pest management and pest reduction when growing onion and garlic.

For more information about growing vegetables, visit the UC ANR California Garden Web website.

Onion, Allium cepa, and garlic, Allium sativum.

Pests and disorders of Onions and Garlic



Diseases (continued)

Environmental disorders



Statewide IPM Program, Agriculture and Natural Resources, University of California
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