The addition of mercury compounds to the fertilizer mixture as a control for common scab of the potato under Long Island conditions

Summary

Under Long Island conditions the addition of either yellow oxide of mercury or calomel to the fertilizer mixture reduces the infestation of common scab of the potato. Four pounds per ton of either of these compounds seems to be the proper amount to use. Yellow oxide of mercury is somewhat more effective in controlling scab than is an equal amount of calomel.

The yield on treated plats was slightly less in the season of 1934, but decidedly greater in 1935.