Three growers agreed to apply 1/4th the regular rate of Citrus Fix and MaxCel every 45 days on approximately 1 acre, about 2 rows, each of Hamlin and Valencia orange trees. Grove locations are Sebring, Babson Park and Ft. Meade. The last application for the first growing season occurred in October, 2014. Growers were diligent in making timely applications. Comparable control rows are being monitored two rows from the sprayed trees. Approximately one acre was treated in each cultivar and these trees plus controls were categorized as to tree health. No apparent difference in flush growth or any phytotoxicity was detected. Tree condition (decline status) was monitored and evaluated at the end of the fall period but no difference was detected. Fruit drop was measured and yields obtained. Flowering will be checked for any difference in timing or intensity. Fruit drop was measured and yields obtained during the harvest period. Decline rated trees (3) had less fruit than 1 rated trees and 3 % more drop. Yields were not different for year one between Control and treated trees, but fruit drop was numerically less for the treated trees by 6 % for Hamlins and 3 % for Valencias compared to the Control plots for all sites combined. Fruit dropped Total fruit Total fruit dropped n per tree (no.) per tree (no.) per tree (%) Tree condition Trees rated 1 145 97 a 429 A 24 B Trees rated 3 147 99 a 396 B 27 A Hamlins 4 sites evaluating 2,4-D+ Maxcel Controls 16 100 a 354 a 32 A 2,4-D+ Maxcel 16 92 a 399 a 26 B Valencias Controls 18 51 a 399 a 14 A 2,4-D + Maxcel 18 46 a 429 a 11 B Each spray application included 5 gm ai ProGibb per acre with the Citrus Fix and Maxcel in the second year. Flowering was evaluated in March of year 2, but no differences were detected in time nor intensity of flowering. Treated and Control trees were categorized by three levels of tree health and were monitored for fruit drop, leaf drop, flushing, yield, etc. We monitored leaf drop to see if these frequent applications may affect leaf drop as well as fruit drop. If they do, it would more than compensate for keeping some additional fruit on the tree longer than normal for HLB affected trees. Leaf drop was not greatly different between the sites, nor were large differences found between the low concentration treatment and the control trees. Total leaf drop for Treated vs Control at each site was 370 vs 340; 243 vs 254, and 231 vs 233 total leaves for the fall count period. There was very little difference between 1 rated and 3 rated (decline) trees. Leaf drop was much heavier during September and early October than later for Hamlins, and leaf drop was heavier for Valencias in December than later in the spring. In one case almost 70 % of the leaf loss occurred by October 8th. No differences were found between PGR-treated and Control trees in the amount of leaf drop. This late summer, early fall leaf drop did not occur prior to HLB. Fruit drop was more uniform from late September until December. Per site drop rates for Treated vs Control Hamlin trees were 19 vs 15.5, 18.8 vs 19.4 and 24.5 vs 25.1, respectively. There was usually only 1 or 2 % difference between 1 and 3 rated trees. Overall fruit drop rates in year two were 22 % and 19 %, respectively, for Hamlin and Valencia trials at Babson Park, 22 % and 20 % at Sebring and 18 % and 15 % at Ft. Meade, respectively. No differences were found between the low concentration PGR treatments and Controls at any of the sites for either healthier or more declined trees in the Valencia trials. The reduced fruit drop in treated trees after the first year did not occur in the second year. No differences in juice content, brix or acidity were found between Treated and Control tree fruit. At each site there was no difference in the fruit per tree, fruit or leaf drop or tree condition between the Control and PGR treatments in the second year after two years of treatments. Therefore the experiment was terminated.