296 Interaction Between Naa and Ba on Cropping and Fruit Size in `delicious' and `empire' Apples
Year: 1994
Type: article
Abstract: Benzyladenine (BA), reported to increase fruit growth in apples, was evaluated with NAA to overcome NAA-induced inhibition of fruit growth. High volume sprays of NAA (15 mg·liter -1 ), BA (25 to 100 mg·liter -1 ) and combinations were applied to Redchief `Delicious' (king fruit = 10 mm). Yield was not significantly reduced. The combinations (NAA + BA 25, 50 or 100 mg·liter -1 ) resulted in the highest percentage of small fruit (39% < 70 mm) and the lowest percentage of large fruit (35% > 77 mm) compared to NAA, BA and hand thinned control. There was no significant effect of NAA or BA on size of king fruit in absence of lateral fruit competition on a given spur, while the combinations decreased (P = 0.01) king fruit size. NAA, but not BA, reduced growth of lateral fruit, with or without competition. However, the combinations caused marked suppression of lateral fruit growth and reduced seed content. With `Empire', both NAA (10 mg·liter -1 ) and BA (25 to 150 mg·liter -1 ) effectively thinned. Fruit size was greater with BA than NAA. The combinations (NAA, 10 mg·liter -1 + BA, 25 or 50 mg·liter -1 ) over-thinned and did not increase the amount of small fruit as in `Delicious'.
Source: HortScience
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2581674832