Copper Deficiency New leaves are yellow, strap-shaped or distorted. Lack of copper Apply a micro nutrient that contains copper. Damaged leaves will not recover. New foliage will form normally. Myrothecium Leaf Spot Large gray-brown, oval leaf spots form at leaf tips or margins.
Fungal structures worm in concentric rings within the spots on the underside of the leaf.
Myrothecium roridum Do not apply excessive amounts of nitrogen fertilizer.