Remember, by the time you see visual problems, it’s already late in the day. Use Trace to help prevent the following micronutrient deficiency symptoms: Boron: Stunted growth, hollow stems, poor fruit and seed development. Copper: Dark green curled leaf tips, poor flowering and fruiting. Manganese: Interveinal chlorosis in younger leaves, slowed growth. Zinc: Smaller, abnormal leaves, stunted roots. Iron: Interveinal chlorosis progressing to white leaves. Molybdenum: Older leaf scorching, stunted growth, poor nutrient utilisation.