Utjecaj Alara-85 na rast i rodnost jabuke sorte Idared [regulatori rasta - stimulatori].
1983
Dubravec K. | Dubravec I. | Hrlec G.
The inhibitory effect of Alar-85 preparation on the lenght of 1-year-old shoots was investigated, as well as its stimulating effect on the increase of yield, the colour and hardness of fruits of "Idared" apple variety under production conditions. The row direction was north-south. The soil was medium-deep anthropogenized pseudogley and the planting distance was 5 x 3 m. The spring dose was 100 and 200 g/100 1 of water and summer one 50 and 100 g/100 1 of water. Treatment with Alar-85 did not cause changes in the blooming time with any dose or application term. Spring application of both doses influenced a little the increase of blooming intensity, this affecting the yield. Application of Alar-85 in spring also caused a slight increase in the color of coloured fruits. Spring application had an inhibitory effect on the lenght of 1-year-old shoots on M 11 stock. The strongest effect was reached with the dose of 100 g/100 1 of water. Spring application of Alar-85 had a stimulating effect on the yield. The dose of 200 g/100 1 of water had a stronger influence on the increase of yield than the dose of 100 g/100 1 of water(in one year of the investigation). Several inflorescences with full blossoms were noticed one year in one treated tree(spring application). Summer treatment under Yugoslav conditions did not show a notable influence on the quality of yield, the ratio of classes in the yield, or on the reduction of fruits falling off the trees before harvest. there was no notable effect on the change of the average size of fruits either. The influence on the number of coloured fruits was not strong, but it was present in both years. At the harvest time, the harder fruits were from the trees treated with higher Alar-85 dose (100 g/100 1 of water)and after storage, those from the trees treated with a lower dose(50 g/100 1 of water). The results of the investigation of the preparation residues in the fruits show that it should not be applied in the summer term.
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