Excess water can cause enlarged lenticels that remain visible throughout storage and act as entry points for disease organisms. Pest Control Weeds Competes well against weeds, but is sensitive to post-emergence applications of metribuzin. Insects Psyllid injury is common and easily seen in this cultivar. Fungicides One to three applications may be necessary for the control of foliar early blight. They may be susceptible to growth cracks and hollow heart if poor irrigation management is used.
Centennial is generally resistant to second growth problems.
Vine killing is required in most years. Tubers can become large late in the season, careful monitoring is necessary after mid-August. Heavy netting enables Centennial Russet to be moderately resistant to harvest bruising. Virus spread is limited because of low-aphid preference. Bacterial ring rot symptoms usually are not visible until 90 days after planting, but will be intense.