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Messages - citrange

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26
Citrus General Discussion / Re: Soluble Fertilizer(which is best)
« on: April 12, 2015, 06:52:47 AM »
Just had another look at your fertiliser labels.
Interestingly, the African Violet fertiliser has a low proportion of its N content from urea, and it actually quotes a maximum biuret level.
The Fruit & Citrus has a much higher urea content but doesn't mention biuret.
Perhaps you should keep looking for something with the correct NPK ratio, high trace element content but low urea/biuret.

27
Citrus General Discussion / Re: Soluble Fertilizer(which is best)
« on: April 12, 2015, 03:17:29 AM »
The problem with urea is that it can contain a chemical called biuret - a manufacturing by-product or breakdown product of urea. This has some bad effects on citrus, but the concentration of biuret is rarely quoted on fertiliser labels. Sometimes 'low biuret' is mentioned.
See http://edis.ifas.ufl.edu/ch142

28
Citrus General Discussion / Re: 3D Printing Helping in Fight Against Citrus Greening
« on: February 17, 2015, 04:59:34 PM »
Need more information to understand this. I picture a mini mouse trap which springs shut only when a psyllid enters - but that seems fairly unlikely! Does it trap a single insect? How big is it? Would you need thousands for each tree? Or is it just a research tool that currently has no hope of actually reducing psyllid numbers?

29
Citrus General Discussion / Re: Dye absorbed by citrus roots? limon rosso.....
« on: December 23, 2014, 11:38:00 AM »
There are different forms of sequestrene.
I found a similar question on website http://brightagrotech.com/iron-in-aquaponics/
A manufacturer replied —-Thank you for your inquiry about Becker Underwood’s Sprint 138 EDDHA micronutrient iron.
In reply to your question, the iron ingredient of the product is inherently red and there are no dye colorant additives.
So, what you see in the water solution is the natural color of the iron content.

By the way, was your citrus tree supplier Scarletts? They import from La Palmara nursery in Sicily which I visited earlier this year. They are a reputable grower and wouldn't add dye to try and make fruit red. And as Millet says, it wouldn't work!

30
Citrus General Discussion / The Quest for Citrus Wakonai!
« on: December 07, 2014, 08:13:45 AM »
Citrus wakonai is a wild citrus variety from Papua New Guinea. It was discovered about ten years ago, but, outside its native area, is only kept by government researchers in Australia. Such new varieties are interesting - even if they aren't commercial varieties themselves - because they may contain genes with unusual properties such as disease or pest resistance. Citrus wakonai is said to fruit at one year from seed.
I have always been interested in these odd varieties, and set a challenge to an adventurous Frenchman to collect seeds! Sylvain set off in August this year on an amazing trip. He is currently describing his travels on a French citrus forum AgrumesPassion.com . He has given me permission to translate and reproduce this on my own citrus website.
I am still currently adding pages - there are lots of incredible photos to come! So work in progress.
It starts at http://www.homecitrusgrowers.co.uk/australianpngnativecitrus/The_Quest_for_Wakonai.html
Take a look. Comments welcome.
Mike/Citrange

31
Citrus General Discussion / Re: Benzbromarone Kills Citrus Greening Baceria
« on: July 11, 2014, 03:35:47 PM »
Ignorant me looked up FMV.
Full Motion Video?
Fair Market Value?
Fields, Morris & Verdin (wine merchants)?
Ah, found it - Fig Mosaic Virus!!
But what's it got to do with Citrus Greening?

32
Citrus General Discussion / Re: grapefruit
« on: July 11, 2014, 03:27:58 PM »
No difference. Grapefruit is English, pamplemousse is French.
However, in France  both grapefruit (Citrus paradisi) and pummelo (Citrus grandis) are sometimes called 'pomelo'.
In England, pummelos - which I believe is the correct spelling - are sometimes labelled 'pomelo'.
There is similar confusion in many European languages!

33
Citrus General Discussion / Re: South Africa's 2014 Citrus Imports into The USA
« on: July 11, 2014, 03:16:48 PM »
As I didn't understand the above post, I did a little research to make it clearer for me and anyone else who missed the clues.

First, 'Zebedalia' was a top exporting citrus farm in South Africa.

'BEE' means Black Economic Empowerment. Also known as 'afirmative action.'

From what is probable a very biassed website (http://www.rense.com/general51/southafricacalamity.htm) comes this article:

The Zebediela Citrus Estate came into possession of the South African Government in 1974. It was hugely prosperous until then. Thereafter it grew to what was described as "the diamond of agricultural projects". The Reader's Digest Illustrated Guide to Southern Africa (1978) wrote "Nearly 400 million oranges are harvested each year from the groves of Zebediela, the world's biggest citrus estate. At the height of the season about 15,000 cases of oranges leave Zebediela every day. The fruit comes from more than 565,000 trees irrigated by enough water to supply a city. The whole estate is highly mechanised and many of the most advanced handling techniques in world citrus production have originated from Zebediela"
 
In 1994, Zebediela was placed under the control of the Agricultural and Rural Development Corporation (ARDC). This newly-formed ANC administration, ruined not only the R30 million per year harvest of Zebediela, but 'scores of other agricultural projects in the area' as well.
 
Corruption, theft and maladministration ensured that by 2001 the estate of 2260 hectares (ha) was reduced to 800 hectares. 'Hundreds of thousands of oranges and lemons were not harvested, and workers were not paid. R8 million worth of lemons were left to rot. 50 tractors fell into disrepair. Managers with 40 years experience were replaced by people who knew nothing of farming.

However, someone in South Africa is clearly still producing enough citrus to export large quantities to the US!

34
Citrus General Discussion / Re: meyer lemon Improved or not ?
« on: June 06, 2014, 01:30:53 PM »
Most Meyer Lemon trees in the USA used to be symptomless carriers of the Citrus tristeza virus.
However in 1975 a virus-free clone was introduced and distributed under the name Improved Meyer, and all older trees were supposed to have been destroyed - or at least never propagated from.
I have never managed to ascertain whether plants in Europe were all sourced from the USA and virus free.
However, from the point of view of a single potted plant, there is no observable difference between the two.
The virus produces no symptoms in the Meyer Lemon.

35
Citrus General Discussion / Re: Greening? Old fading leaves? Nutrient Deficiency? All of the above?
« on: May 16, 2014, 12:28:40 PM »
It might also help to first clear the grass from under the tree up to the drip line.
Otherwise the grass gets the available nitrogen before the lime!

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