Training and pruning
Of the conventional training systems, modified leader and open centre
are usually adopted to train peach trees. If sunlight exposure is a limiting
factor (hills),
vase or open centre system of training is
generally used. In this system, at the time of planting, stem is cut to a
height of 60–80cm from the ground level and only 3–4 branches are allowed to
develop on it. In the following dormant season, these 3–4 branches arising in
opposite directions with wide angled crotches are headed back. The unwanted
branches are thinned out. In the second year, 5–7 secondary limbs on the main
scaffolds are selected and headed back. On secondary scaffold, diseased, weak
and dry shoots are thinned out and 2 or 3 secondary laterals are selected at
this stage. All the side branches which grow towards the ground, centre of
the tree or vertically straight should be thinned out. The main stem is kept
clear up to 45cm above the ground.
Peaches require heavy and regular pruning because
fruiting occurs laterally only on previous season’s growth which bears only
once in its life time. The pruning of peach has two important
components—thinning out and heading back of the shoots. Pruning should be done
so as to produce 25–50cm of growth annually under temperate condition,
which is sufficient for maintaining optimum productivity. During early bearing,
the selected shoots should be lightly pruned by removing 20–30% linear growth
after corrective pruning of the tree. After 7–8 years of bearing, the
corrective pruning should be followed by removal of linear extension growth to
the extent of 70–80%. The remaining 50% of selected shoots should be headed
back by removing 20–30% linear growth. In general, fruiting shoots should be
lightly pruned and alternate ones severely headed back to get sufficient yield
and following year’s growth respectively. In subsequent years, the pruning
severities in these two branches are changed which maintains the trees in growing
and fruiting condition.
In July Elberta peach, pruning should be done to
retain 40 fruiting shoots and each shoot is headed back to 15 nodes. Where
heavy pruning is required, three-fourths heading back + 40% thinning out is
recommended. Mid-winter is best time of pruning.
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