Articles
Improving the fruit set and productivity of the pear trees after spring frost
Article number
1449_15
Pages
111 – 118
Language
English
Abstract
Ensuring regular and quality yield in the orchards is challenging for the producers.
In pear trees, good productivity could be achieved by increasing fruit set and fruit size.
On the other hand, late spring frost and the damage it causes to the flowers and fruitlets are very common.
For improving the fruit set in pear trees in such cases, various management practices are used around the world.
In the paper the results of the evaluated effects of various growth regulators and biostimulants on the fruit set, the productivity and growth of eight-years-old ‘Williams’ and ‘Abate Fetel’ trees grafted on pear seedlings, after damages of flowers caused by late spring frost are presented.
In the research, the following treatments were used: gibberellic acid GA3 (ProGibb plus 10%–3×100 g ha‑1), gibberellic acid GA3 (ProGibb 40% SG–1×50 g ha‑1), gibberellic acid GA3 (ProGibb 40% SG–2×25 g ha‑1), prohexadione calcium (Regalis–3×0.8 L ha‑1), biostimulant based on the extract of the seaweed Ecklonia maxima (Basfoliar Kelp SL -1×2.5 L ha‑1) and amino acids (Aminosol–3×3 L ha‑1). The treatments were applied two days after frost (during the full flower period) and in a 10-day interval, respectively according to the variants.
Trunk growth, length of shoots, fruit set, number of fruits per tree, yield, average fruit weight, fruit length, fruit diameter, seed number, fresh firmness soluble solid content and acids were assessed.
The results indicate that some of the treatments have certain positive effects on the vegetative growth, fruit set, yield, and quality of the fruits.
In pear trees, good productivity could be achieved by increasing fruit set and fruit size.
On the other hand, late spring frost and the damage it causes to the flowers and fruitlets are very common.
For improving the fruit set in pear trees in such cases, various management practices are used around the world.
In the paper the results of the evaluated effects of various growth regulators and biostimulants on the fruit set, the productivity and growth of eight-years-old ‘Williams’ and ‘Abate Fetel’ trees grafted on pear seedlings, after damages of flowers caused by late spring frost are presented.
In the research, the following treatments were used: gibberellic acid GA3 (ProGibb plus 10%–3×100 g ha‑1), gibberellic acid GA3 (ProGibb 40% SG–1×50 g ha‑1), gibberellic acid GA3 (ProGibb 40% SG–2×25 g ha‑1), prohexadione calcium (Regalis–3×0.8 L ha‑1), biostimulant based on the extract of the seaweed Ecklonia maxima (Basfoliar Kelp SL -1×2.5 L ha‑1) and amino acids (Aminosol–3×3 L ha‑1). The treatments were applied two days after frost (during the full flower period) and in a 10-day interval, respectively according to the variants.
Trunk growth, length of shoots, fruit set, number of fruits per tree, yield, average fruit weight, fruit length, fruit diameter, seed number, fresh firmness soluble solid content and acids were assessed.
The results indicate that some of the treatments have certain positive effects on the vegetative growth, fruit set, yield, and quality of the fruits.
Publication
Authors
M. Kiprijanovski, S. Georgievski, N. Saraginovski, T. Arsov
Keywords
Pyrus communis L., growth regulators, biostimulants, yield, fruit quality
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