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PEST MANAGEMENT DECISION GUIDE: GREEN AND YELLOW LIST

Iron Deficiency in tomatoes

Physiological disorder
Kenya
  • Avoid burning of crop residue in the cropping area
  • Incorporate organic materials such as compost manure (400kg/acre) in the soil to avoid poor drainage or cracking of the soil when dry
  • Construct drainage canals to avoid water logging on the farm
  • Leave the farm fallow for at least 1 season
  • Always test your soils for iron levels and pH, 1-2 months before planting
  • Carry out yearly monitoring of soil PH. If it is above 7 take action
  • Look for: yellowing and interveinal chlorosis on new emerging leaves of the plant with old leaves still green. stunted chlorotic tomato plants. Start direct control when you notice 1-2 new leaves are showing bright yellow colour.
  • Use commercial organic fertilizer Yad bio-vitalizer (contains 15637ppm) at a rate of 300kg/acre(750 kg/ha)
  • Incorporate organic materials such as Tithonia leaves and soft branches, compost or farmyard others in soil at planting at the rate of 0.5 kg/m2 (2 tons/acre)
  • Apply inorganic fertilizers (iron sulphate, Mavuno, YaraMila or cereal) during planting at recommended rates after soil testing. Spray foliar feeds (Iron sulphate, Bayfolan, Wuxal) as per instructions and repeat after 14 days if iron deficiency is severe
  • Always wear protective clothing when applying fertilizers. Always follow instructions on the label such as dosage, timing of application, maximum number of applications and protective clothing. Dispose excess fertilizer properly to avoid aquatic contamination. Store mineral fertilizers at dry conditions and separate from pesticides
AUTHOR(S): Kagai K.K (MOA), Oyoo J.(KALRO), Gachini G.N. (KALRO) and Otipa M (KALRO), Judith Oyoo (KALRO), Peninah Munyao (MOALF) and Wilson Nabakwe (MOALF)

CREATED/UPDATED: August 2014
PRODUCED BY: Plantwise

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