Tropical Fruit Forum - International Tropical Fruit Growers



Author Topic: Leaf Curl Mania  (Read 557 times)

Nayelie321

  • Member
  • ***
  • Posts: 77
  • In California most of the time.
    • California
    • View Profile
Leaf Curl Mania
« on: August 18, 2018, 10:46:11 PM »
First of all itís night time so Iíll take and upload pictures of the affected plants tomorrow.
Leaf Curl has become a tad of a problem in my fruit garden. Iíve tried using copper sulfate to control and eliminate it to no avail. Iíve used organic methods such as neem oil to no avail. Iíve tried using insecticides to control possible vectors but the leaf curl continues(I used both malathion and spinosad). The leaf curl affects my soursop plants the most with weak growth(posting tomorrow) to the point in where the leaves canít open or grow to their full size. It affects my mangoes, avocados and sapodillas but only on the point of the leaf to a certain extent the damage to them is negligible but visible. It has also affected my langsats, eggfruits, and starapple plants. Iíll post pictures of each tomorrow. I got so angry recently that I stripped the all the leaves from one of my young soursop plants(6ft tall and 7ft wide) then sprayed it with isopropyl alcohol, sprayed it with malathion and then copper sulfate(3 times the recommended amount). Itís been 3 weeks and itís began to bud out...infected. Iíve managed to control it only on my sapodilla plants and a couple of my mangoes. However the plants that seems to be immune even though they are at close proximity to the infected plants are My rollinia, Rambutan and garcinias(purple mangosteen and achachas). Anyone here has any tips? Iíll upload visuals tomorrow.

pineislander

  • Hero Member
  • *****
  • Posts: 1201
    • Bokeelia, FL
    • View Profile
Re: Leaf Curl Mania
« Reply #1 on: August 19, 2018, 07:58:40 AM »
What makes you sure this is disease related and not a nutrient problem? Are these all in soil? What has the weather been like?
Pictures will help not just closeup but showing the environment too.

johnb51

  • Hero Member
  • *****
  • Posts: 2372
    • USA Deerfield Beach, FL 33441 Zone 10b
    • View Profile
Re: Leaf Curl Mania
« Reply #2 on: August 19, 2018, 10:22:54 AM »
Where are you located?  California is a BIG state.
John

Nayelie321

  • Member
  • ***
  • Posts: 77
  • In California most of the time.
    • California
    • View Profile
Re: Leaf Curl Mania
« Reply #3 on: August 19, 2018, 12:39:33 PM »
This is located in a few acres I own in southern Mexico.
 








Those are a few pictures of the leaves of various infected plants. Not all.

At first I thought it was a soil deficiency however I purchased some canister plants recently and they got infected too due to being in close proximity to one of my infected soursop. I used the same soil to fill bags for seedlings too and my seedlings are doing fine their leaves are large with no signs of infection.









Guanabanus

  • Hero Member
  • *****
  • Posts: 2291
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Leaf Curl Mania
« Reply #4 on: August 19, 2018, 12:53:00 PM »
Are you fertilizing with Urea?
Har

Nayelie321

  • Member
  • ***
  • Posts: 77
  • In California most of the time.
    • California
    • View Profile
Re: Leaf Curl Mania
« Reply #5 on: August 19, 2018, 01:18:11 PM »
No. I do fertilize the citrus I have and ocationally use foliage fertilizer on the garcinias and mangoes but not the soursop. Both fertilizer and underutilized plants are infected.

spaugh

  • Hero Member
  • *****
  • Posts: 1949
    • San Diego County California
    • View Profile
Re: Leaf Curl Mania
« Reply #6 on: August 19, 2018, 01:55:33 PM »
Is it city water?  Maybe too much chlorine or other salts in the agua?
Brad Spaugh

Nayelie321

  • Member
  • ***
  • Posts: 77
  • In California most of the time.
    • California
    • View Profile
Re: Leaf Curl Mania
« Reply #7 on: August 19, 2018, 03:58:17 PM »
Is it city water?  Maybe too much chlorine or other salts in the agua?

I water the plants using ground water from my well. I donít treat the water with anything since itís only used for watering the crops.

Production doesnít seem to be affected that much since the plants tend to produce a good crop. The main ones affected soursops and canistels which at times produce undersized leaves that look the bulb on a pitcher plant  than anything else and whose production is affected. I only harvested two soursops from the tree this year since itís infection. Fruit was standard size(5lbs and uniform in shape) so it doesnít seem to affect the fruit quality.

Iím considering cutting down all the infected trees and burning them. Then I can simply replace them. Most of the infected trees are a few years old but I have grafted backups in the nursery.

spaugh

  • Hero Member
  • *****
  • Posts: 1949
    • San Diego County California
    • View Profile
Re: Leaf Curl Mania
« Reply #8 on: August 19, 2018, 06:26:50 PM »
Is it city water?  Maybe too much chlorine or other salts in the agua?

I water the plants using ground water from my well. I donít treat the water with anything since itís only used for watering the crops.

Production doesnít seem to be affected that much since the plants tend to produce a good crop. The main ones affected soursops and canistels which at times produce undersized leaves that look the bulb on a pitcher plant  than anything else and whose production is affected. I only harvested two soursops from the tree this year since itís infection. Fruit was standard size(5lbs and uniform in shape) so it doesnít seem to affect the fruit quality.

Iím considering cutting down all the infected trees and burning them. Then I can simply replace them. Most of the infected trees are a few years old but I have grafted backups in the nursery.

That seems like a bad thing to do if you are not sure there is actually a disease present and what it is. 

Do you have a TDS meter to measure the solid content in the water and an EC meter to get an idea how much salts are present?

They have those tools very cheap around 12$ on Amazon or ebay if you are the los angeles you could get some and take them back to the farm in Mex.
« Last Edit: August 19, 2018, 06:38:15 PM by spaugh »
Brad Spaugh

Nayelie321

  • Member
  • ***
  • Posts: 77
  • In California most of the time.
    • California
    • View Profile
Re: Leaf Curl Mania
« Reply #9 on: August 19, 2018, 08:42:03 PM »
Is it city water?  Maybe too much chlorine or other salts in the agua?

I water the plants using ground water from my well. I donít treat the water with anything since itís only used for watering the crops.

Production doesnít seem to be affected that much since the plants tend to produce a good crop. The main ones affected soursops and canistels which at times produce undersized leaves that look the bulb on a pitcher plant  than anything else and whose production is affected. I only harvested two soursops from the tree this year since itís infection. Fruit was standard size(5lbs and uniform in shape) so it doesnít seem to affect the fruit quality.

Iím considering cutting down all the infected trees and burning them. Then I can simply replace them. Most of the infected trees are a few years old but I have grafted backups in the nursery.

That seems like a bad thing to do if you are not sure there is actually a disease present and what it is. 

Do you have a TDS meter to measure the solid content in the water and an EC meter to get an idea how much salts are present?

They have those tools very cheap around 12$ on Amazon or ebay if you are the los angeles you could get some and take them back to the farm in Mex.



Iíll definitely take your advice, Brad. Iíll order them tonight so I can test as soon as possible. Thank you.

Just noticed a couple of my seedling soursops have the disease as well. Itís truly bothersome.

Guanabanus

  • Hero Member
  • *****
  • Posts: 2291
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Leaf Curl Mania
« Reply #10 on: August 20, 2018, 09:58:22 AM »
Any source of Urea, whether in urine (from pets or humans), or soluble fertilizers, sprays, soil mixes, etc., can cause leaf tip issues where the soil is deficient in Nickel.
The Urease enzyme contains Nickel.  Without Urease, plants don't handle Urea well.
Har

 

Copyright © Tropical Fruit Forum - International Tropical Fruit Growers