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Topics - Millet

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Citrus General Discussion / Saint Valentine's Day
« on: February 14, 2018, 11:09:26 AM »
On this Valentine's day I went out to the greenhouse a picked a large Valentine Pummelo, for breakfast.  The pummelo was very red, very juicy,  very delicious, and very appropriate for the occasion.. Happy Valentines day.

It is common acidic acid.  Put on sticky taps it attracts Male (and female) psyillids and kills them.

My New Zealand Lemonade (NZL) tree has produce a nice crop of fruit.  This year I let the fruit remain on the tree until they were fully mature and very yellow.  The mature fruit was about the size of an Eureka lemon.  Yesterday I picked a couple fruit for taste testing.  Unfortunately the fruit did not taste like lemonade, but rather had a washed out lemon taste to it.  I would not say they tasted unpleasant, but rather bland.  The sour aspect was much less than that of a lemon.  In the past, I remember eating the fruit while it was still green, much the way one eats a lime, but don't remember much about the exact taste, other than I liked it.  The tree has a ton of flowers on it, so new fruit should be coming soon.  I plan on tasting the new crop at various intervals trying to determine when the fruit should be picked. Anyone else with a NZL tree have comments concerning picking time?

Citrus General Discussion / Light Splitting Film For Greenhouses
« on: February 04, 2018, 02:17:08 PM »
The University of Colorado at Boulder to develop a cost effective greenhouse cover that splits sunlight into photosynthetically efficient light and also repurposes inefficient infrared light for water purification.  Under normal conditions, plants only use about 50 percent of incoming sunlight for photosynthesis. The new CU Boulder technology takes the form of a semi-translucent film that splits incoming light and converts the rays from less desired green wavelengths into more desirable red wavelengths, thus increasing the amount of photosynthetically efficient light for the plant with no additional electricity consummation.  The thin engineered material can be applied directly to the surface of the greenhouse.   The near-infrared wavelengths  can help clean brackish wastewater, allowing it to be recirculated in an advanced humidification-dehumidification interface and further reducing the greenhouse's energy footprint.

Citrus General Discussion / Blooming & Leaf Drop
« on: January 31, 2018, 04:29:56 PM »
The season for citrus trees to flower is getting close.  The heavy bloom period is also the period of greatest leaf drop by the tree.  The production of flowers requires a lot of the trees energy, and the leaves that are not pulling their weight are discarded.  Therefore, when you notice more leaves falling to the ground don't become over concerned that the tree might have a problem.  This is a normal process.

Winter prebloom foliar spray application of low Biuret urea is known to greatly increase flower number, thus greater crop yield.  Proper timing is important to achieve the desired outcome.  Winter prebloom sprays are designed to increase flower number and fruit yield without reducing fruit size. Winter prebloom foliar sprays with low biuret urea (46-0-0 >0.5% biuret) is applied at the rate of .44-lbs. (200-grams) in 2 gallon of water plus one teaspoon of a good surfactant per gallon.. For large area sprays (acres) 50-lbs. per 225 gallons water. NOTE: a second low biuret urea foliar spray should also be done after early fruit drop and June drop periods to insure an  increase in fruit size.  In most areas  this would be around July 1 to July 20.

Citrus General Discussion / UCR Variety Collection To Go CUPS
« on: December 31, 2017, 10:04:14 PM »

The recent discovery of three Huanglongbing (HLB)-infected trees in Riverside approximately 2.25 miles from UCR and the
pervasive spread of Asian Citrus Psyllids (ACP), which moves the bacteria that causes HLB,
crystalized the need for further protection of the UCR Citrus Variety Collection.

The 1038 cultivars and species of citrus and related genera in the field site of the Citrus Variety Collection is one of the most diverse 
collections of citrus and related genera in the world. Two additional small trees of each cultivar and species are have been housed  in aging screened greenhouses at UCR Agricultural Operations or at the USDA NCGRCD since 2008. If we need to remove HLB infected trees from the field collection in the future, this would significantly affect our ability to breed new cultivars and conduct research that utilizes this diversity.
This disease has created a critical need for a two-phase project to protect the Citrus Variety Collection. Your donation of any amount will help protect the collection.


UC Riverside’s College of Natural and Agricultural Sciences (CNAS) has secured funding for
the initial site study design and bid process, both of which are required by public universities.
Additional financial support from generous individual donors will allow us to complete a full site study for a three-acre parcel

A site development for an initial one-acre parcel and required storage
Installation of two Citrus Under Protection (CUP) Systems that would screen and protect up to an acre of newly planted trees of all
cultivars and species in the collection from registered budwood and grown in the ground. With immediate funding, the CUPS system could protect the Collection as early as July 2018.


Site development for two additional acres of property, upon which we plan to construct one or two new Research/Instructional Screenhouses / Greenhouses covering up to two acres and potentially adding an additional Equipment Storage / Outbuilding. These structures will provide more robust protection for the Collection, making it a more permanently safeguarded presence at UC Riverside.

See UCR Citrus Variety Internet web site  for full details.

Citrus General Discussion / Greenhouse Air & Heat Dispersion
« on: December 24, 2017, 04:33:15 PM »
My greenhouse is 32 feet wide, 72 feet long and 11.5 feet high.  To insure equal dispersion of heat and air movement to all sections of the greenhouse, I use fans.  Because heat raises there are three 20-inch fans hanging from the ceiling 10 feet from each end and one in the middle of the greenhouse to blow the heat back down to the plants.  Additionally, three 20 inch fans are setting three feet above the floor moving air horizontally around the greenhouse.   The ceiling fans perform twp functions.  First, as stated they move air from the roof back down to the level of the plants, and second they reduce the temperature differential between the inside ceiling covering and the outside cold air.  The greater the differential between the two, the faster heat is lost to the outside.  By blowing the hot air back down to the floor, the heat gradient is reduces and therefore less heat is lost.         

Citrus General Discussion / Citrus Scab Found In Alabama
« on: December 21, 2017, 03:44:39 PM »
The U.S. Department of Agriculture (USDA) has confirmed the first detection of sweet orange scab in Baldwin County, Alabama. The fruit sample was collected by Alabama Department of Agriculture inspectors during a survey for citrus greening disease

Citrus General Discussion / HLB Getting Worse in California
« on: December 19, 2017, 11:46:07 AM »
This time it was 61 trees found with the deadly HLB disease, not the usual 2 or 3 trees as in the past finds.

Citrus General Discussion / HLB In California Backyards
« on: December 15, 2017, 11:31:10 AM »
Citrus Greening (HLB) has been spotted in about 250 backyard trees in Southern California, but so far California’s commercial orchards have been spared. Researchers are hard at work to keep it that way.

Citrus General Discussion / Must Be A Reverse Sport
« on: December 07, 2017, 03:15:32 PM »
Again this year the same branch on my Cara Cara tree is producing Washington Navel Oranges.  Last year I noticed that branch was not producing pink fleshed Cara Cara, but rather the regular orange colored fruit.  This year since the same branch is once again producing fruit with  orange colored flesh that branch must have surely revered back to a Washington navel.   For those that don't know, Cara Cara were originally a sport of a Washington Navel orange tree growing in Venezuela.

that transmits citrus greening disease, a development expected to help farmers control a plague that has destroyed trees in growing regions of Brazil and the United States.

The scientific breakthrough, shared with Reuters exclusively on Tuesday, is the result of six years of research on Diaphorina citri, the vector of citrus greening disease.

The molecule was discovered by Fundo de Defesa da Citricultura (Fundecitrus), a research center sponsored by farmers and orange juice producers in Brazil, in partnership with the University of California, Davis and the University of Sao Paulo's Agricultural College, known as Esalq.

The next step will be to synthesize the pheromone from the molecule and create a product that will work as a kind of trap to attract and neutralize the insect. Then scientists hope to reduce the spread of a disease that resulted, since 2005, in the destruction of almost half of Brazil's current orange tree area.

"This will not cure greening disease, but it will allow us to work in an intelligent and assertive way against the insect," Juliano Ayres, general manager at Fundecitrus, said in a telephone interview.

The first commercial solution should be available to farmers in a year, said Walter Leal, the Brazilian researcher representing UC Davis who participated in the interview.

Citrus General Discussion / If You Live In California
« on: December 05, 2017, 04:24:57 PM »
Sky Valley HEIRLOOM Navel Oranges season is beginning. The limited offering of this premium citrus will begin shipping next week, and is expected to last into March. The older a citrus tree gets, generally the better tasting citrus they produce. The limited crop of this heirloom variety was originally PLANTED IN THE 1930s, (trees are now 85 years old) and is now harvested from a single ranch for the duration of the season, ensuring consistent flavor and quality. Sky Valley Heirloom Navel Oranges TRULY represent quality over quantity and are unmatched in the citrus category as the only citrus grower that supplies heirloom navels from a single ranch, meaning retailers never have to worry about mixed results during the season; Sky Valley Heirloom Navels taste as great at the end of the season as they do at the beginning.

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