Study Investigator: John Curtis, PhD
Location of Study: Florida, USA, open field
Study Period: March - November 2014
2 Quarts/acre at Bloom 50%
2 Qts/acre at Post-Bloom
2 programs tested: Program A (4 applications at 1 quart/acre), Program B (2 applications @ 2 quarts/acre)
Total tree monitored:
Cyan 365® has been sprayed by conventional sprayer : rear pak- blast sprayer, 250 GPA
This study is even more outstanding because of the exceptional use of the IFAS mobile packing unit invented by Dr Rouse University of Florida. This mobile packing unit gives a high reliability of this agronomic study. Packing houses is usually where the results are severily corrupted.
One of the vicious effects of HLB is a noticeable increase in mature quality fruit drop. On infected trees, there is a serious decrease in the number of flowers that will set fruit and mature into marketable quality fruit.
Mid-June Fruit Drop (natural drop due to fruit competition)increases.
With HLB disease, early fruit drop is about 25-30% (Source: USDA, 2013).
The trees infected with HLB are experiencing more and more fruit drop.
Fruit quality is affected.
Contaminated trees have smaller fruit and internal quality is suffering.
Profit wise, it is extremely detrimental for the growers and the industry in general ...
Another side effect from HLB: the bitter taste of the juice.
The fruit show an significant decrease in sugar content. (brix, fructose - pound solids). This is a big issue for both fresh and juice producers within the citrus industry.
Agronomic study conducted from March to November 2014 and repeated with the same protocol in 2016. All operations were supervised and controlled by scientist John Curtis with his independent technical crew. The property used was a highly-reputed citrus grower’s commercial grove within the Indian River District (Florida).
THE PROGRAM [A] showed better results than program [B].
Here under results for program [A]:
Fruit size distribution:
The AVERAGE fruit size breakdown per TREE provides significant improvement on the packout for the most valuable sizes:
Return On Investment (ROI):
Notes: It is noticeable that for fresh fruits market, fruit size distribution results should be added to this $800 per acre.
Objectives: Ray Ruby red grapefruit on sour orange rootstock, 6 YO trees, severely affected by HLB, canker resurgence, early fruit drop, leafminer, melanoses, greasy spots, rust mites, etc.
For a better view of the graphs and charts, reposition your mobile device into landscape mode.
Variety Used: Ruby red grape fruit on sour orange rootstock, 6 YO trees, severely touched by HLB, canker resurgences, premature fruit drop, leaf minor...
With an increase of 0.8 boxes per tree, you will increase your total box count with 96 boxes per acre @ TPA 120. As you may see with more fragmented applications as per program [A] or T1 at lower dosage you will obtain the best results than the program [B] or T2.
For the extra yield obtained with Prog A with Cyan 365® (+75 pieces of fruit per tree), the distribution of the fruit size is as here under (photo). In the meantime it is very important to notice here the presence of a mobile packing house unit lended to Dr Curtis by the University of Florida (Dr Rouse equipment). This equipment allow to give a higher credibility and reliability to this scientific and agronomic study.
The fruit size distribution is showing here the abilty of Cyan 365® to improve the sizes of the fruits in the most marketable and valuable sizes.
For fresh, fruit size results here above must be taken into consideration to achieve an even better Return on Investment.
Juice content: +15% & 11% respectively on 40's and 32's. The juice content has improved the most on these 2 sizes.
Pound solids/Brix: +13% on 56's and +25% on 40's. It is commonly accepted that larger the fruit are, less brix there is. Note: 7.50 is the flat rate for November 2014 for Grape fruit (GF) within Indian river district, county Port Saint Lucie. The flat rate is transmitted each season each year to the packing houses. These data remains to be studied more extensively.