Treatments for iron chlorosis in peach trees

Abstract

Soil applications of 300 g of Fe‐EDDHA, 10 kg and 20 kg of sulfur per tree were used to treat iron‐deficient peach trees. Fe‐EDDHA corrected rapidly and conpletely the deficiency, while both doses of sulfur had a slower effect with a significant decrease in soil pH. A complementary application of 2 kg iron sulfate per tree, localized to the soil, also showed a fast and effective control of iron chlorosis. In a drip‐irrigated orchard, lower doses of Fe‐EDDHA and applications of sulfuric acid through irrigation are resulting in a fast and consistent correction of the problem. Iron sulfate in contrast has not responded thus far.

Key words:

• Iron chelate
• FeEDDHA
• iron sulfate
• sulfuric acid
• drip irrigation
• banding