Responses of Orange and Grapefruit Trees to Maleic Hydrazide

Erickson, Louis C.; Brannaman, B. L.; Hield, H; Miller, Milton D.

doi:10.1086/335752

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Previous work with oranges, grape fruit and lemons showed that the most undesirable fruit quality effect of MH was associated with rind thickness (8,10). Rind thickness measured made on fruit from the 0.4 Krenite and 0.25% EHPP treatments and untreated trees showed no significant differences on both dates measured, however the rind thickness of the lemons from all treat ments, including the control were reduced about 2 mm after storage.…”

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confidence: 96%

Inhibition Effects of Localized Growth Regulator Sprays on Mature Lemon Trees1

Boswell

Burns

Hield

1976

horts

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confidence: 96%

Inhibition Effects of Localized Growth Regulator Sprays on Mature Lemon Trees1

Boswell

Burns

Hield

1976

horts

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“…Growth inhibitors and retardants. MH-30, a highly active growth inhibitor of citrus (3,17) which increases or delays the loss of cold hardiness in the field (2,8,9,18), increased seedling cold hardiness in controlled conditions. MH-30 at 500 and 1000 ppm induced cold hardiness in grapefruit leaves and tw igs (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Effect of Growth Regulators on Citrus Seedling Cold Hardiness1

Young

1971

J. Amer. Soc. Hort. Sci.

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Citrus seedlings sprayed with chemicals which influence the cold hardiness of other plants were hardened in controlled conditions. Maleic hydrazide (MH-30) increased cold hardiness; however, growth retardants (2-chloroethyl)trimethylammoniumchloride (chlormequat) and succinic acid-2,2-dimethylhydrazide (SADH), and growth inhibitor abscisic acid (ABA) did not. ABA at high concns decreased cold hardiness as did gibberellic acid (GA3). Benzyladenine (BA), kinetin (KN), decenylsuccinic acid (DSA), and (2-chloroethyl)phosphonic acid (ethephon) had little or no effect on cold hardiness. These results are consistent with tests on citrus conducted under field conditions.

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“…Hand pruning is ex pensive, and with both hand and mechan ical pruning there is the expense of brush shredding (1,9). Chemical pruning has many drawbacks such as undesirable rind thickness (6,7), chemicals not available 'R eceived for publication July 3, 1980. The authors thank R. K eim , Superintendent, U niversity o f C ali fornia, South C oast Field Station, for his cooperation and for furnishing trees used in this field trial, also ac know ledgem ent to E .I.…”

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confidence: 99%