Primena NAA i BA u hemijskom proređivanju plodova sorti jabuke grupe Red Delicious / Application of NAA and BA in chemical fruit thinning of Red Delicious apple group
2012
Lukić, M. (Institut za voćarstvo, Čačak (Srbija)) | Marić, S. (Institut za voćarstvo, Čačak (Srbija)) | Glišić, I. (Institut za voćarstvo, Čačak (Srbija)) | Milošević, N. (Institut za voćarstvo, Čačak (Srbija))
The paper presents the fruit thinning response to NAA and BA plant regulators of Red Delicious spur and standard types - Hapke Delicious, Scarlet Spur and Red Chief. The experiment was designed to evaluate NAA, over a range of concentrations - 15 ppm, 20 ppm and 30 ppm when applied alone, and BA + NAA combinations (BA - 60 ppm, 100 ppm, 120 ppm or 140 ppm + NAA 5 ppm) for thinning the assessed apple cultivars. All the applied treatments with NAA and BA + NAA adequately thinned Hapke Delicious and Scarlet Spur, whereas application of NAA 20 ppm and 30 ppm and combined treatment BA 140 ppm + NAA 5 ppm were effective fruit thinners for Red Chief. In terms of the average fruit weight and number of fruits categorized as large (>70 mm or >75 mm), as well as from the aspect of fruit number per trunk cross-sectional area, the variant of treatment BA 140 ppm + NAA 5 ppm was most effective on Hapke Delicious and Red Chief, whereas BA 100 ppm + NAA 5 ppm had the best effect on Scarlet Spur.
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