Citrus Tree Diseases

Reviving the Citrus Tree in Arizona



Here is a breakdown of how to keep your citrus trees robust and healthy in Maricopa County, along with disease prevention solutions and relevant local resources: 

Understanding Maricopa County Citrus Challenges 

  • Alkaline Soil: Our soil tends to be alkaline, which can lead to nutrient deficiencies (particularly iron) in citrus trees. This shows up as yellowing leaves. 
  • Intense Heat: Citrus trees thrive in warmth but can suffer from sunburn and stress during extreme heat spells. 
  • Citrus Pests: Aphids, scale insects, whiteflies, and citrus leaf miners are common pests in our region. These insects can weaken trees and make them more susceptible to disease. 

Essential Care for Healthy Citrus Trees 

  • Watering: Deep, infrequent watering is crucial. Allow the soil to dry slightly between waterings. Overwatering is a huge contributor to citrus problems. 
  • Fertilization: Use a citrus-specific fertilizer, following the package directions. Fertilize regularly during the growing season. 
  • Soil Amendments: If your soil is very alkaline, consider adding amendments like iron chelates and sulfur to improve nutrient availability. 
  • Sunlight: Plant citrus trees in a location with full sun for at least 6 hours a day. 
  • Pest Monitoring: Regularly inspect your trees for signs of pests. Early detection is key for effective management. 

Common Citrus Diseases and Solutions 

  • Citrus Greening (Huanglongbing): Sadly, there is no cure for this devastating bacterial disease. Prevention is key – buy trees from reputable nurseries and control pests that can spread bacteria. 
  • Root Rot (Phytophthora): Prevent this by avoiding overwatering and ensuring good drainage. Fungicide treatments may be effective if caught early. 
  • Sooty Mold: While not directly harmful to the tree, it impacts photosynthesis. Control the underlying pest problem (aphids, scale, etc.) and the sooty mold will clear up. 
  • Texas Root Rot: Unfortunately, there is no effective cure. Prevention focuses on good soil drainage and avoiding overwatering. 

Local Resources 

  • Warner’s Tree Surgery: (480) 969-8808 (https://mesatreedoctors.com/) Or 
  •  (https://warnerstreesurgery.com/). Specialize in Tree Health and Disease Diagnosis. 
  • University of Arizona Cooperative Extension: Maricopa County: (https://extension.arizona.edu/maricopa). Superb resource for science-based gardening information. 
  • Arizona Master Gardener Program: ([https://extension.arizona.edu/master-gardener]). Provides trained volunteers to assist homeowners with gardening issues, including citrus care. 

Remember: Healthy citrus starts with diligent care practices. If you suspect a disease, seeking professional help early can significantly improve your chances of saving your tree. 

Warners Tree Surgery is a Mesa, Arizona (Based) “Family Business”. Our Tree Disease Expert, Warner, is available to help you with your Sick Trees if you live within a 30-mile radius of Mesa. Warner Working, Our Tree Doctor, cares for Many Different Species of Trees in and around the cities of Mesa, Gilbert, Chandler, Tempe, Sun Lakes, and Scottsdale. If You need of a Tree Disease Professional with Over 50 Years of Knowledge and Experience, then Call “Warners Tree Surgery.” Our Number Is: (480) 969-8808 For More Information/Videos Visit Our Websites https://mesatreedoctors.com/ Or https://warnerstreesurgery.com/ 

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