THE USE OF THE PLANT GROWTH REGULATOR REGOPLANT IN THE CONDITIONS OF CLIMATE CHANGE IN THE SOUTH OF UKRAINE

The effects ReTain Plant Growth Regulator (830 g in 1000 L water/ha) applied to a commercial block of 'Arctic Snow' nectarines 7 days before the first harvest was assessed in relation to harvest delay, fruit size, fruit quality (flesh firmness and brix), as well as the quality of the fruit following export to Taiwan. The untreated block (0.87 ha) and the ReTain-treated block (1.0 ha) were harvested according to the orchard's standard maturation criteria of background colour, size and percent blush colour. Based on picking schedules, the maturation of the ReTain block was delayed by 2.75 days (P<0.05). The fruit continued to grow during this delay and resulted in a 12.3% increase in yield and an increase of 393 packed cartons/ha. There were more (P<0.001) cartons of ReTain-treated fruit packed in grade sizes 69–78 mm diameter and less of smaller size classes (51–66 mm) compared with untreated fruit. The increase in both the number of cartons of class 1 fruit and fruit size on the ReTain block resulted in a Return on Investment (ROI) of 14.7 : 1 with an additional net return of AU$17 655/ha over the untreated block. There was a correlation between fruit size and flesh firmness with larger fruit being firmer than smaller fruit (P<0.001), however, packed ReTain-treated fruit was 3.2 N firmer on average (P<0.001) than packed untreated fruit for all size grades and from all harvests and packs. Brix levels increased (P<0.001) with fruit size but there was no difference (P = 0.568) between ReTain-treated fruit and untreated fruit. Two containers of fruit (early and late picks) were exported to Taiwan. The containers held a temperature of 0.5–2.0°C for the 14–15 day transit time from Australia to Taiwan. ReTain-treated fruit in both containers was 1.7 N firmer (P = 0.022) than untreated fruit upon arrival in Taiwan. After ambient storage (23°C) of fruit from container 1 for 45 h, fruit firmness declined (P<0.001) from an average of 65.7 to 43.2 N and there was no difference (P = 0.826) between treated or untreated fruit. It is concluded that ReTain application to 'Arctic Snow' nectarines can increase financial returns to growers through increased fruit size and quality benefits as well as maintain a higher flesh firmness following export.

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The effect of plant growth regulator treatments on the levels of ethylene emanating from excised turgid and wilted wheat leaves

Planta ◽

10.1007/bf00388127 ◽

1980 ◽

Vol 148 (4) ◽

pp. 381-388 ◽

Cited By ~ 46

Author(s):

S. T. C. Wright

Keyword(s):

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Wheat Leaves

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Growing Degree Day Models for Plant Growth Regulator Applications on Ultradwarf Hybrid Bermudagrass Putting Greens

Crop Science ◽

10.2135/cropsci2018.01.0077 ◽

2018 ◽

Vol 58 (4) ◽

pp. 1801-1807 ◽

Cited By ~ 1

Author(s):

E. H. Reasor ◽

J. T. Brosnan ◽

J. P. Kerns ◽

W. J. Hutchens ◽

D. R. Taylor ◽

...

Keyword(s):

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Putting Greens ◽

Degree Day

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Peanut (Arachis hypogaea L.) Response to the Hormonal Plant Growth Regulator Early Harvest®

Peanut Science ◽

10.3146/pnut.31.2.0002 ◽

2004 ◽

Vol 31 (2) ◽

pp. 70-73 ◽

Cited By ~ 3

Author(s):

J. P. Beasley ◽

W. J. Grichar ◽

D. L. Jordan ◽

R. G. Lemon ◽

B. A. Besler ◽

...

Keyword(s):

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Economic Value ◽

Indole Butyric Acid ◽

Pod Yield ◽

Commercial Plant ◽

Commercial Mixture ◽

Arachis Hypogaea L ◽

Early Harvest

Abstract Experiments were conducted from 1996 through 2001 in Georgia, North Carolina, and Texas to determine peanut response to the commercial plant growth regulator Early Harvest® (a commercial mixture of cytokinin, gibberellic acid, and indole butyric acid). Early Harvest (applied in the seed furrow) or Early Harvest TST (applied as a dry seed treatment) followed by four foliar applications (four-leaf peanut, initial pegging, 14 d after initial pegging, and pod fill), was compared to non-treated peanut in five, 13, and three experiments in these respective states. Early Harvest did not affect pod yield or gross economic value of peanut regardless of location, cultivar, or edaphic and environmental conditions. These data suggest that a spray program consisting of Early Harvest most likely will not improve pod yield or gross economic value of peanut.

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