Lemon Citrus Tree Diseases

Combatting Lemon Citrus Tree Diseases in Arizona



Here is a detailed guide to lemon tree health in Arizona, including solutions and local resources: 

Understanding Lemon Trees in the Arizona Climate 

  • The Challenge: Arizona’s arid climate, intense heat, and alkaline soils present challenges for lemon trees, which thrive in slightly acidic, well-drained environments. 
  • Opportunities: With proper care, lemon trees can produce abundant fruit in Arizona. Popular varieties include Meyer lemons (less acidic, more cold-tolerant), Lisbon lemons (classic, tart lemons), and Eureka lemons (seedless). 

Key Areas for Lemon Tree Health 

  1. Watering 
  • Solution: Water deeply and less frequently. During hot months, water every 7-10 days. In winter, water every 3-4 weeks. Let the soil dry out slightly between waterings. Build a watering basin around the tree to help water penetrate deeply. Avoid watering directly at the trunk. 
  • Signs of Trouble: Yellowing leaves can indicate both overwatering and underwatering. 
  1. Nutrition 
  • Solution: Use a balanced citrus fertilizer 3-4 times a year (February, May, August, and sometimes October). If possible, get a soil test to determine specific nutrient needs. 
  • Signs of Trouble: Iron chlorosis, causing yellowing leaves with green veins, is common in alkaline soils. Use chelated iron fertilizer. 
  1. Sunlight 
  • Solution South and west-facing locations provide ample light. Protect young trees from intense afternoon sun with shade cloth in extreme heat. 
  1. Pruning 
  • Solution: Prune lightly after harvesting to shape the tree and improve airflow. Remove suckers and dead or crossing branches. Major pruning is best done in late winter. 
  1. Pest and Disease Control 
  • Common Problems: Citrus leafminers (tunnels in leaves), aphids, scale, whiteflies, and citrus greening disease (carried by Asian citrus psyllids). 
  • Solutions:  
  • Inspect regularly. Wash off minor pest infestations. 
  • Use horticultural oils or insecticidal soaps. 
  • For citrus greening, there is no cure – prevention is vital. Buy trees from reputable sources, monitor for the psyllid, and remove infected trees. 

Local Arizona Resources 

  • Warner’s Tree Surgery: [480-969-8808]  
  • University of Arizona Cooperative Extension: Provides research-based information on citrus cultivation: https://extension.arizona.edu/ 
  • Master Gardener Helpline (Maricopa County): For personalized advice: [https://extension.arizona.edu/master-gardener] 

Additional Tips 

  • Protect from Frost: If temperatures drop, cover young trees with frost cloths or blankets. 
  • Mulch: Helps retain moisture and suppress weeds. 
  • Observe your trees: Regular observation is the best way to catch problems early. 

Remember: Lemon trees are rewarding! With careful attention, you will enjoy the fresh bounty of your own Arizona lemons. 

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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