How to Manage Pests

Pests in Gardens and Landscapes

Early maturation

Late in the season plants may mature prematurely. Leaves may curl and turn a purplish color. Tubers may also appear malformed.


Environmental factors such as low moisture or nutrition, primarily phosphorus, or a combination of these may result in early maturation or tuber malformations. These stressed plants are more susceptible to diseases and disorders such as Verticillium wilt, early blight, and black spot. Good cultural practices can minimize disorders. Plant for uniform stands with correct spacings. Maintain levels of soil fertility and moisture that support uniform plant development throughout the growing season. Irrigation to maintain adequate soil moisture levels during hot weather is critical, but excessive soil moisture must be avoided. Avoid excess nitrogen, which causes excessive vine growth.

Early flowering of potato
Early flowering of potato


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

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