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.
flowering of potato