Citrus Greening
July 30, 2021
July 30, 2021
What is Citrus Greening?
Originally coined as Huanglongbing, or 'Yellow Dragon Disease' in Chinese Mandarin, Citrus Greening remains a persistent menace to citrus trees and related species. Caused by the bacterial culprit Candidatus Liberibacter asiaticus (CLA), this disease continues to wreak havoc on Florida's citrus industry. It is crucial to note that the original information, though from 2021, remains pertinent as Citrus Greening, exacerbated by the invasive citrus psyllids (Diaphorina citri Kuwayama), continues to adversely affect Florida's citrus crop.
As highlighted by aphis.usda.gov, this disease, often abbreviated as HLB, stands as the most serious threat to individual trees and the broader citrus industry. Movement of infected trees, their leaves, twigs, branches, and fruit out of the infected area is strictly discouraged. Identifying Citrus Greening: A Challenging Task Identifying Citrus Greening proves challenging as trees can remain asymptomatic for extended periods post-infection. Vigilance is key, particularly in spotting citrus psyllids and their eggs.
As highlighted by aphis.usda.gov, this disease, often abbreviated as HLB, stands as the most serious threat to individual trees and the broader citrus industry. Movement of infected trees, their leaves, twigs, branches, and fruit out of the infected area is strictly discouraged. Identifying Citrus Greening: A Challenging Task Identifying Citrus Greening proves challenging as trees can remain asymptomatic for extended periods post-infection. Vigilance is key, particularly in spotting citrus psyllids and their eggs.
Once symptoms manifest, they include green color on ripe fruit, blotchy mottle leaves, asymmetric yellowing, stunted growth, reduced fruit size, premature fruit drop, corky veins, and root decline. Unfortunately, the disease is fatal, and with no current treatment available, prevention takes precedence.
Preventing the Onslaught: Control of Citrus Psyllids The best defense against Citrus Greening is the control of citrus psyllids. While eradicating the insect is challenging, their population can be managed through combinations or rotations of horticultural mineral oil, malathion, and other insecticides. Various treatments are applied to the canopy and soil to keep the psyllid population in check. As emphasized earlier, once a tree is infected, removal is the only recourse. Proper offsite disposal, handled by knowledgeable arborists such as those at Mid Florida Tree Service, is essential to prevent further spread.
A Glimmer of Hope: Ongoing Research and Management Though ongoing studies aim to develop anti-bacterial agents to combat Citrus Greening, complete solutions are yet to be realized. While progress is being made, management of the disease, including vigilant psyllid control and timely tree removal, remains the most effective strategy until a comprehensive solution is available.
Preventing the Onslaught: Control of Citrus Psyllids The best defense against Citrus Greening is the control of citrus psyllids. While eradicating the insect is challenging, their population can be managed through combinations or rotations of horticultural mineral oil, malathion, and other insecticides. Various treatments are applied to the canopy and soil to keep the psyllid population in check. As emphasized earlier, once a tree is infected, removal is the only recourse. Proper offsite disposal, handled by knowledgeable arborists such as those at Mid Florida Tree Service, is essential to prevent further spread.
A Glimmer of Hope: Ongoing Research and Management Though ongoing studies aim to develop anti-bacterial agents to combat Citrus Greening, complete solutions are yet to be realized. While progress is being made, management of the disease, including vigilant psyllid control and timely tree removal, remains the most effective strategy until a comprehensive solution is available.


By Mid-Florida Tree Service
•
February 13, 2026
Trees add beauty, shade, and value to properties throughout Polk County. From Lakeland to Bartow to Mulberry, mature oaks, pines, and palms are a major part of the landscape. However, Florida’s climate creates unique challenges that can affect tree health if problems are not identified early. Understanding common tree issues in Polk County helps homeowners protect their investment and avoid costly removals. Storm Damage and Structural Weakness High winds and heavy rain are common throughout Polk County. Even if a tree survives a storm, hidden structural damage may remain. Common storm related issues include: Cracked or split trunks. Limbs with weak attachment points. Leaning trees due to root movement. Canopy imbalance after major limb loss. Internal decay caused by storm wounds. Early evaluation can determine whether corrective pruning can restore stability or if removal is necessary. Soil Compaction and Root Stress Many Polk County yards experience compacted soil due to foot traffic, construction, or heavy equipment. Compacted soil restricts oxygen flow to roots and limits water absorption. Signs of root stress include: Sparse canopy growth. Smaller than normal leaves. Premature leaf drop. Slow overall growth. Increased susceptibility to pests and disease. Relieving soil compaction and improving root conditions often restores tree vitality. Pest and Disease Issues Florida’s warm climate supports a wide range of pests and fungal diseases. Oaks, pines, and palms are especially vulnerable if already stressed. Common problems in Polk County include: Fungal growth at the base of trees. Leaf discoloration or spotting. Bark separation or oozing sap. Palm nutrient deficiencies. Insect activity in weakened wood. Our ISA Certified Arborists evaluate symptoms carefully before recommending treatment or removal. Improper Pruning Improper trimming can cause long term structural problems. Over pruning, topping, or removing healthy limbs weakens the tree and increases storm risk. We frequently see: Excessive canopy thinning. Large flush cuts that do not heal properly. Unbalanced canopy weight. Stress from removing too many green fronds on palms. Corrective pruning helps restore structure and reduce future risk. Root Damage From Construction Driveways, patios, and landscaping projects can damage roots without obvious signs at first. In Polk County neighborhoods with mature trees, root disturbance is a common cause of decline. Warning signs may include: Gradual thinning of the canopy. Increased branch drop. Soil settling near the base of the tree. Delayed decline months after construction. Professional evaluation helps determine whether damage can be managed. Proactive Tree Care in Polk County Most serious tree problems begin with subtle warning signs. Regular inspections and routine maintenance reduce the likelihood of emergency removals and storm failures. At Mid-Florida Tree Service, our ISA Certified Arborists evaluate trees carefully and recommend practical solutions that protect your property and landscape. If you are concerned about a tree in Lakeland, Bartow, Mulberry, or anywhere in Polk County, we are ready to help. Call Mid-Florida Tree Service at (813) 588-0315 to schedule a professional tree evaluation in Polk County.







