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Citrus Diseases

 

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04Alternaria.jpg Alternaria

Leaf lesions.

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03Alternaria.jpg Alternaria

Fruit lesions.

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01Alternaria.jpg Alternaria

Fruit lesions.

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02Alternaria.jpg Alternaria

Close-up of fruit lesion.

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01Anthracnose.jpg Anthracnose

Close-up of fruit lesion.

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02Anthracnose.jpg Anthracnose

Close-up of fruit lesion.

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03Anthracnose.jpg Anthracnose

Close-up of fruit lesion.

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04Anthracnose.jpg Anthracnose

Close-up of leaf lesion.

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05Anthracnose.jpg Anthracnose

Close-up of leaf lesion.

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06Anthracnose.jpg Anthracnose

Leaf lesions.

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07Anthracnose.jpg Anthracnose

Symptoms on fruit.

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08Anthracnose.jpg Anthracnose

Symptoms on fruit and leaf.

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09Anthracnose.jpg Anthracnose

Symptoms on leaf.

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11Anthracnose.jpg Anthracnose

Symptoms on leaf (top surface).

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10Anthracnose.jpg Anthracnose

Symptoms on leaf (bottom surface).

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12Anthracnose.jpg Anthracnose

Soft brown decay at the stem end of a Meyer lemon fruit.

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Chimera_on_V_a.jpg Chimera

Leaf symptom - variegation as a result of chimera mutation on Valencia orange leaves.

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segmented_coloration_by_E_Serrano.jpg Chimera

Segmented coloration on fruit as a result of chimera mutation.

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Chimera_on_orange_rind_Jack_Kelly_Clark_UC_Statewide_IPM_Program_cs.jpg Chimera

Chimera on orange rind (fruit).

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CBS_topleafcaption.jpg Citrus bacterial spot

Leaf lesions.

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IMG_2897_Citrus_bacterial_spot_red_grapefruit_JHG_cs.jpg Citrus bacterial spot

Leaf lesions on Red grapefruit cultivar.

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IMG_2890_Citrus_bacterial_spot_red_grapefruit_JHG_cs.jpg Citrus bacterial spot

Leaf lesions on Red grapefruit cultivar.

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IMG_2893_Citrus_bacterial_spot_red_grapefruit_JHG_cs.jpg Citrus bacterial spot

Leaf lesions on Red grapefruit cultivar.

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IMG_2894_Citrus_bacterial_spot_red_grapefruit_JHG_cs.jpg Citrus bacterial spot

Leaf lesions on Red grapefruit cultivar.

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IMG_2896_Citrus_bacterial_spot_red_grapefruit_JHG_cs.jpg Citrus bacterial spot

Leaf lesions on Red grapefruit cultivar.

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Hard_spot_2_NP_bs.jpg Citrus black spot

Hard spot form of citrus black spot on fruit.

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HG_Picture_1_CBS_symptoms_1_cs.jpg Citrus black spot

Citrus Black Spot symptoms are frequently numerous and irregularly distributed on the fruit peel.

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blackspotpycnidia.jpg Citrus black spot

Pycnidia in center of lesions on fruit.

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False_melanose_2bs.jpg Citrus black spot

False melanose form of citrus black spot on fruit.

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Early_virulent_2bs.jpg Citrus black spot

Early virulent form of citrus black spot on fruit.

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Cracked_spot_blackspot.jpg Citrus black spot

Cracked spot form of citrus black spot on fruit.

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HG_Picture10_Advanced_stages_of_a_hard_spot_lesion_cs.jpg Citrus black spot

Advanced stage of a hard spot lesion showing a tan center and the brick-red raised border on fruit.

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HG_Picture11_Freckle_spot_or_early_virulent_spot_cs.jpg Citrus black spot

"Freckle spot" symptom type or "early virulent spot". Reddish or colorless spots on fruit lacking a halo which are a sign of heavy infection.

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HG_Picture12_Freckle_spot_or_early_virulent_spot_cs.jpg Citrus black spot

Close up of "freckle spot" symptom type or "early virulent spot" on fruit. Reddish or colorless spots lacking a halo which are a sign of heavy infection.

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HG_Picture13_Virulent_spot_cs.jpg Citrus black spot

"Virulent spot" symptom type. Fusion and expansion of many lesions covering part of the surface of heavy infected fruit giving a lathery appearance.

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HG_Picture14_Cracked_spot_cs.jpg Citrus black spot

"Cracked spot" symptom type on fruit. Lesions with cracked surface and irregular margins.

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HG_Picture15_Cracked_spot_2_cs.jpg Citrus black spot

Close up of "Cracked spot" symptom type on fruit. Lesions with cracked surface and irregular margins.

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HG_Picture16_CBS_symptoms_on_green_fruit_cs.jpg Citrus black spot

Symptom on green fruit that can become hard spots later in the season.

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HG_Picture17_Symptoms_on_green_fruit_can_become_hard_spot_lesions_later_in_the_season_cs.jpg Citrus black spot

Symptom on green fruit that can become hard spots later in the season.

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HG_Picture_4_Hard_spot_symptom_1_cs.jpg Citrus black spot

"Hard spot" symptom type on fruit. This is the most typical symptom of CBS. Usually appears between the beginning of yellow coloration and maturity.

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HG_Picture_6_Hard_spot_symptom_3_cs.jpg Citrus black spot

"Hard spot" symptom type on fruit. This is the most typical symptom of CBS. Usually appears between the beginning of yellow coloration and maturity.

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HG_Picture_5_Hard_spot_symptom_2_cs.jpg Citrus black spot

"Hard spot" symptom type on fruit. This is the most typical symptom of CBS. Usually appears between the beginning of yellow coloration and maturity.

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HG_Picture_9_Early_stages_of_hard_spot_lesion_on_fruit_cs.jpg Citrus black spot

Early stage of hard spot symptoms on fruit. Note green tissue surrounding the lesions.

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HG_Picture_8_Longitudinal_section_of_a_hard_spot_lesion_on_fruit_cs.jpg Citrus black spot

Longitudinal section of a hard spot lesion on fruit.

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19CitrusCanker.jpg Citrus canker

Water-soaked ring on leaf lesion.

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01CitrusCanker.jpg Citrus canker

Concentric circles found on leaf lesions.

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10CitrusCanker.jpg Citrus canker

Close-up of lesions on front of grapefruit leaf.

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03CitrusCanker.jpg Citrus canker

Yellow halo surrounding leaf lesion.

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15CitrusCanker.jpg Citrus canker

Leaf lesions on grapefruit, top view.

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16CitrusCanker.jpg Citrus canker

Leaf lesions on grapefruit, bottom view.

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17CitrusCanker.jpg Citrus canker

Leaf lesions on grapefruit, chlorotic halo.

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11CitrusCanker.jpg Citrus canker

Symptoms on leaf.

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12CitrusCanker.jpg Citrus canker

Whole leaf symptoms on top and bottom of grapefruit leaves.

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02CitrusCanker.jpg Citrus canker

Fruit lesion with center cracking; Photo by Jeffrey W. Lotz, Florida Dep. of Ag. and Consumer Services,

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18CitrusCanker.jpg Citrus canker

Grapefruit, fruit lesions.

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04CitrusCanker.jpg Citrus canker

Fruit, leaf, and stem canker lesions.

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05CitrusCanker.jpg Citrus canker

Symptoms on fruit.

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06CitrusCanker.jpg Citrus canker

Typical leaf, stem, and fruit symptoms on grapefruit.

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07CitrusCanker.jpg Citrus canker

Symptoms on sweet orange fruit.

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08CitrusCanker.jpg Citrus canker

Xanthomonas campestris pv. citri infection on fruit of Citrus unshiu (satsuma) showing crater-like lesions.

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09CitrusCanker.jpg Citrus canker

Symptoms on fruit (grapefruit).

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13CitrusCanker.jpg Citrus canker

Stem canker caused by Xanthomonas campestris pv. citri on Citrus natsudaidai.

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14CitrusCanker.jpg Citrus canker

Xanthomonas campestris pv. citri on stem of Citrus sp.; outer layer of bark removed to show brown lesions.

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01_CCDV_symptoms_on_leaves_crinkling_and_warping_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptoms of CCDV.

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02_CCDV_chlorotic_flecking_on_young_leaves_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptom - chlorotic flecking on young leaves.

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03_CCDVchlorotic_flecking_and_warping_on_leaves_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptom - chlorotic flecking and warping on leaves.

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04_CCDV_Gondol_like_leaves_with_inverted_cupping_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptom - gondol like leaves with inverted cupping on young leaves.

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05_CCDV_distorted_puckered_young_and_old_leaves_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptom - distorted, puckered both young and old leaves.

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06_CCDV_wrinkled_curled_leaves_with_bumpy_areas_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptom - wrinkled/curled leaves with some bumpy areas.

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07_CCDV_matures_leaves_distorted_and_warping_with_nutrient_def_MY_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptom - distorted and warped mature leaves with nutrient deficiency.

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CCDV_2745_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptoms on Red Blush grapefruit leaves. Courtesy EcoPort (http://www.ecoport.org), Kersting U.

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CCDV_2746_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptoms of CCDV on leaves of Minneola tangelo. Courtesy EcoPort (http://www.ecoport.org), Kersting U.

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CCDV_Leaf_2751_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

The first symptom of citrus chlorotic dwarf on a leaf of a rough lemon seedling after inoculation. Note the notch on the left margin of the leaf, which is symptomatic for this disease. Courtesy EcoPort (»

CCDV_2748_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Tree symptom on Fremont mandarin on sour orange rootstock 10 weeks after inoculation. Control is on the left. Courtesy EcoPort (http://www.ecoport.org), Kersting U.

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CCDV_2749_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf symptoms - typical bent tip symptoms of CCDV on leaves of sour orange seedling. Courtesy EcoPort (http://www.ecoport.org), Kersting U.

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CCDV_2752_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

A close-up of the v-notch on a leaf of a citrus chlorotic dwarf inoculated rough lemon seedling. Courtesy EcoPort (http://www.ecoport.org), Kersting U.

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CCDV_2753_EcoPortDatabank_Kersting_U_cs.jpg Citrus chlorotic dwarf virus (CCDV)

Leaf mottle and tip notches on rough lemon 10 weeks after inoculation with CCDV. Courtesy EcoPort (http://www.ecoport.org), Kersting U.

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15CitrusScab.jpg Citrus scab

Pustules on fruit.

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01CitrusScab.jpg Citrus scab

Symptoms on fruit.

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13CitrusScab.jpg Citrus scab

Symptoms on fruit.

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02CitrusScab.jpg Citrus scab

Symptoms on fruit.

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03CitrusScab.jpg Citrus scab

Symptoms on fruit.

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04CitrusScab.jpg Citrus scab

Symptoms on fruit.

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14CitrusScab.jpg Citrus scab

Symptoms on leaf.

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20CitrusScab.jpg Citrus scab

Common citrus scab on sour orange leaf. Note the scabby areas at the tip of the conical formations.

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12CitrusScab.jpg Citrus scab

Close-up of scabby areas at the tip of conical formations on leaf.

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17CitrusScab.jpg Citrus scab

Common citrus scab on sour orange leaf.

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16CitrusScab.jpg Citrus scab

Early stage of common citrus scab on sour orange leaf.

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19CitrusScab.jpg Citrus scab

Early stage of common citrus scab on sour orange leaf.

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18CitrusScab.jpg Citrus scab

Advanced stage of citrus scab on sour orange.

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05CitrusScab.jpg Citrus scab

Symptoms on leaf.

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06CitrusScab.jpg Citrus scab

Symptoms on leaf.

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07CitrusScab.jpg Citrus scab

Symptoms on leaf.

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08CitrusScab.jpg Citrus scab

Symptoms on leaf.

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09CitrusScab.jpg Citrus scab

Symptoms on leaf.

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10CitrusScab.jpg Citrus scab

Symptoms on leaf.

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11CitrusScab.jpg Citrus scab

Symptoms on leaf.

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07CSD.jpg Citrus stubborn disease (CSD)

Lopsided fruit.

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Koala64.jpg Citrus stubborn disease (CSD) Chrysanthemum36.jpg Citrus stubborn disease (CSD) 18CSD.jpg Citrus stubborn disease (CSD)

Tree exhibiting irregular (off season) flowering.

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01CSD.jpg Citrus stubborn disease (CSD)

Leaf chlorosis.

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02CSD.jpg Citrus stubborn disease (CSD)

Leaf chlorosis.

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03CSD.jpg Citrus stubborn disease (CSD)

Leaf chlorosis.

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Citrus Diseases
March, 2013