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Thursday, August 7, 2014

Nutrient Deficiencies in Citrus

Many thanks to Dr. Mongi Zekri who sent me this information to share.

GREAT photos are included to help us diagnose!

Zekri, M. and T.A. Obreza. Boron and chlorine for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Molybdenum and nickel for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Iron and copper for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Manganese and zinc for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Nitrogen (N) for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Phosphorus (P) for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Potassium (K) for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Magnesium (Mg) for citrus trees.
UF Coop Ext. Ser.

Zekri, M. and T.A. Obreza. Calcium (Ca) and sulfur (S) for citrus trees.
UF Coop Ext. Ser.

Tuesday, August 5, 2014

Citrus Meeting Recap

Dr. Mongi Zekri

Photo is of ZINC deficiency.

Citrus greening is the most devastating problem with citrus. The citrus psyllid insect is the vector (transferee) of this disease. The best I can liken it to is AIDS for citrus, the dirty hypodermic needle being the insect the citrus psyllid, and there currently is no current cure.

ATTACHED is The citrus leafminer and the citrus psyllid in dooryard citrus from our last meeting with Dr. Mongi Zekri.

Here is a link on our blog of the Fertilizer Management data that Mongi provided:

Here is a link on our blog to the Some Citrus Fungal Diseases data that Mongi provided:

Citrus Problems in the Home Landscape

Citrus Culture in the Home Landscape

I included some of MY blog posts below that were covered in Mongi's presentation.

Citrus Canker:

Citrus Phytophthora:

Citrus Greasy Spot:

Citrus Scab:

Citrus Alternaria Brown Spot​:

Florida Citrus Harvesting Periods:

Having problems with your citrus trees in Lee County, Florida?
Email UF/IFAS Lee County Extension Office citrusadvisors@leegov.com to schedule a FREE citrus diagnosis. At least one Master Gardener, who has been specially trained as a Home Citrus Adviser, will visit your ailing tree(s) and recommend appropriate treatment(s).

Meeting Recap: Diagnosing Nutrient Deficiencies in Veggies

Meeting Recap: Diagnosing Nutrient Deficiencies in Veggies
Dr. Monica Ozores-Hampton

Vegetables are only able to access individual nutrients at a specific pH levels. The most aligned pH for all nutrients being accessible is a pH of 6.0 to 6.5. At a pH higher or lower than 6.0 to 6.5, the plant has difficulty absorbing nutrients, even if you over-fertilize.

NITROGEN. Vegetables require 3.0–6.0%. In general, OLDER/lower leaves suffer first. Signs include yellowing of older leaves with reddish undersides. Nitrogen tends to detain growth and accelerate flowering, however yields will be reduced.

PHOSPHORUS. Vegetables require 0.2–0.7%. In general, OLDER/lower leaves suffer first. Signs include stunted growth, thin stems, brown/dead spots. Plants tend to be darker green. Leaves of tomato, lettuce, corn and brassicas can have a purple pigment to the underside of leaves.

POTASSIUM. Vegetables require 2–5%. In general, OLDER/lower leaves suffer first. Signs include tip burn and brown/dead spots between the main veins. As the deficiency progresses, only the veins remain green and the leaves tend to curl.

CALCIUM. In general, NEWER leaves suffer first. Lack of calcium causes blossom end rot on tomatoes.

MAGNESIUM. Vegetables require 0.15–0.4%. Signs include advanced yellowing with brown/dead spots developing.

BORON. Signs include slight yellowing and death of terminal bud.

IRON. In general, NEWER leaves suffer first. Signs include leaves on the TOP of the plant are yellowing between the veins at the base of the leaf. Leaf can look bleached and have brown/dead spots.

MANGANESE. Signs include yellowing between the veins. As deficiency progresses, leaves get a gray metallic sheen with dark brown/dead spots along the veins. There is no signs on the underside of leaves.

SULFUR. Overall yellowing of entire plant. Veins and leaf stalks have a reddish/pinkish color on underside. Advanced deficiency also has brown/dead spots on leaf stalks and leaves become erect and often twisted and brittle.

ZINC. Younger leaves yellow between the veins first, then intense yellowing between the veins occurs. Often leaves become small and take on a rosette-like appearance.

Visual Nutrient Deficiency App. is available at:

Monday, July 7, 2014

Permaculture Meeting Recap June 2014

Mr. Brad Ward of ECHO spoke to us last month on permaculture. There are 12 "pieces" of permaculture. Brad lightly touched on all 12 but I have recapped the 10 we spent more time on:

  1. Know your property year round. Watch the wind, the sun, the rain, what creatures visit... pay attention.
  2. ​Catch and store the FREE stuff: sun, water, seeds, wind, organic matter. ​
  3. Learn from life, don't force it. Work with what you got.
  4. Re-purpose items from your landscape.
  5. There should be no waste from your landscape.
  6. ​Look for patterns in nature to utilize in your landscape. ​
  7. ​Companion plant based on plant needs of soil, water, sun, wind...​
  8. Use diverse plants and plantings.​
  9. ​Make small and slow changes to your landscape. ​
  10. ​Creatively respond to changes in your landscape. ​

Thursday, May 8, 2014

Tomato Disease Photos

Late blight

Tomato Bacterial Leaf SPECK

Tomato Yellow Leaf Curl Virus TYLCV