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Articles

COMPARISON OF FRUIT THINNING SPRAYS ON FOUR APPLE CULTIVARS

Article number

240_42

Pages

229 – 232

Language

Abstract

The crops from trees sprayed with the herbicide terbacil, ethephon, NAA and carbaryl and combinations of these chemicals with mineral oil at various times after full bloom were compared with unthinned control trees of the cultivars Red Delicious, Jonathan, Granny Smith and Golden Delicious.

Single tree plots were sprayed by hand gun (2 700 L/ha) and assessed at harvest by comparing the distribution of fruits over eight size classes.

Terbacil at 200 ppm was effective as a fruit thinning spray but caused temporary leaf damage and some leaf drop.
Treatments that included a carbaryl spray increased the proportion of larger size fruits.
A single spray mixture of carbaryl (1 200 ppm) and NAA (10 ppm) increased the proportion of Golden Delicious apples in commercial sizes by 36%. Some thinning sprays reduced the weight of crop harvested in commercial sizes on Red Delicious and Granny Smith.

Publication

Australian Temperate Fruits Review Conference

Authors

B.E. Windle, H. van Dam

Keywords

Full text

https://doi.org/10.17660/ActaHortic.1989.240.42

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4. EXPERIENCES IN EXPORT APPLE BREEDING

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5. SEX AND KIWIFRUIT BREEDING

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8. VIRUS STATUS OF TEMPERATE FRUIT IN AUSTRALIA

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11. MOLECULAR BIOLOGY, GENETIC TRANSFORMATION AND PLANT IMPROVEMENT

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12. ORCHARD DESIGN

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13. ‘SOLID MODEL’ ESTIMATION OF LIGHT INTERCEPTION BY APPLE ORCHARD SYSTEMS

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17. PRODUCTIVITY AND QUALITY OF NASHI ON TATURA TRELLIS

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P.H. Jerie | B. van den Ende | I.R. Dann

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G.E. Thomson | W.K. Thompson

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