Andy'S Advice: Understanding Tub Growth Cracks And Thumbnail Cracks

摘要

Tuber cracking has been far too common in our area in 2020. There are two types of tuber cracking, growth cracks and thumbnail cracks/air checks. Growth cracks (Figurel) occur during the growth and development of tubers as a result of a physiologicalresponse to environment stress, herbicide injury or disease pressure. However, thumbnail cracks (Figure 2) are a result of impact to tubers during tuber handling or exposure to air when lifted from the soil. Tuber cracking is not desirable in any situation. The quantity and severity of tuber cracking will vary based on the growing environment, variety, disease pressure, handling and cultural management.