Question:

Spraying manganese on peanuts. What’s the rain safe time for the product to work effectively?

Jordan Answer:

Manganese likely needs a few hours. At the rates we apply Mn there may be limited root absorption. If you had wash off keep a close look and apply more manganese with the next fungicide spray unless deficiency symptoms appear more quickly. Boron can be washed from foliage and still be absorbed through roots.