Woodleaf Farm Disease Management System Table 3

Organic Agriculture May 02, 2016 Print Friendly and PDF

This article is part of the Woodleaf Farm Organic Systems Description.

Table 3. Mineral Mix Composition and Rate: Peaches, 2013–2015

On peaches, all ingredients are mixed with 300 gallons of water and applied from first bloom through petal fall using an air blast sprayer with constant mechanical agitation.

    Rate (per acre)






Micronized sulfur S fertilizer, disease management 8 lb 10 lb 6 lb
Maxi-crop (dry kelp) Micronutrient fertilizer, adhesion of ingredients 1.5 lb to second and third sprays 1 lb 1.5 lb
Gypsum (22% calcium, 16% sulfur) Ca and S fertilizer, mechanical coating 6 lb 10 lb 6 lb
Azomite rock dust (hydrated sodium calcium aluminosilicate—11% alumina, more than 70 other minerals and trace elements) Mechanical coating 5 lb 10 lb 5 lb
Ferrous sulfate Fe fertilizer, pH adjustment (to reduce pH to 6.6–6.8) 5 lb 10 lb 5 lb
Sulfate of potash (50% potassium, 18% sulfur)  K and S fertilizer, mechanical coating 5 lb 6 lb 5 lb
Manganese sulfate (31% manganese) Mn fertilizer (Woodleaf soils are low in Mn.) 5 lb 6 lb 5 lb
Solubor (boron) B fertilizer (Woodleaf soils are low in B.) 1 lb 1.5–2 lb 1 lb
Nutramin rock dust (1% calcium, 2.5% iron, 2% sulfur, 30% SIO2) Mechanical coating 2 lb 1.5 lb 2 lb
Activate (a humate) Ingredient aggregator 1 lb 1 lb 1 lb
Therm X70, derived from yucca  Spreader sticker 4 oz 4 oz 4 oz

¹One rain event occurred during bloom; three applications.
²Two rain events occurred during bloom; three applications with higher rates of sulfur. Some burning of peach foliage was observed, possibly due to higher Solubor rate.
³Weather was very dry; one application to three of five peach fields.

This table is part of the Woodleaf Farm Organic Systems Description.

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This is an eOrganic article and was reviewed for compliance with National Organic Program regulations by members of the eOrganic community. Always check with your organic certification agency before adopting new practices or using new materials. For more information, refer to eOrganic's articles on organic certification.

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.