Citrus Greening

Testing Sites

Field Test

  • The iodine-based starch test is used to aid in the selection of leaves for PCR testing
  • Greening infected trees and various other citrus diseases show an increased level of starch accumulation
  • By using an iodine and water solution, it can be applied to a leaf to exhibit starch levels
  • This does NOT verify a positive greening infected tree
  • An Iodine-Based Starch Test to Assist in Selecting Leaves for HLB Testing


• History • Regulations
• Transmission • Pathogen
• Alternate Hosts • Symptoms
• Nutrient Deficiencies Compared to Citrus Greening • Diagnostics
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• HLB Scion Survey