Copper photosynthesis new growth turns yellow, withers, and dies Iron photosynthesis and chlorophyll formation yellowing of new leaves Magnesium chlorophyll synthesis brown and yellowing dead tissue around the leaves Manganese enzyme activator in the growth process new shoots die back, poor fruit color, and early drop Molybdenum assists in the nitrate assimilation process spotting or mottling of leaves, leaves may die and drop early Nitrogen development and quality of fruit tree growth new growth declines or stops, fruit yields decline, small fruit back to top Pest Control Anything that is unwanted in an apple orchard is a pest. The following chart names the types of pests we are concerned with, shows what they look like, and the damage they can do to the tree and fruit. In controlling these pests, there are many substances that we can use. The chart below shows the different forms of control used in our organic apple orchard. To see application rates and times, click on Third Leaf and then click on Sprays.
Sulfur is a protectant.
It must be present to function. Sulfur kills fungal cells by taking up electrons to form hydrogen sulfide. This vapor is deadly to mites. San Jose scale Sulfur is a protectant. It must be present to function.