Agriculture Reference
In-Depth Information
14 °C. This probably triggered a wave of second flush of flowering in 2013
fruiting season (
Personal communication
, 2013). However, during Febru-
ary 2012, the minimum temperature always had hovered between 13 and
15 °C without much change. Similar observations of '
recurrent flowering'
'
phenomenon and occurrence of fruits of different developmental stages on
the same tree have also been reported from Gujarat and Odisha (
Personal
communication
, 2013).
A similar environmental cue prevailed in Lucknow region wherein the
cold periods (<17 °C) were recorded from 15th October onwards in 2011-
2012 and 2012-2013 (Fig. 5.10), The cold periods were found extended
for at least a fortnight more in 2012-2013 (around 169 days) as compared
to 2011-2012 (around 155 days). These extended cold periods impacted
flowering phenology adversely; vegetative flushes emerging concomitant-
ly with flowering, and altered pests and diseases dynamics in '
Dashehari
'
(thrips; anthracnose) besides low number and activity of pollinators. Oc-
currence of frost (-0.2 °C to −1.2 °C on 9th and 10th January, 2013) was
the other notable feature that killed the shoot apices including shoot por-
tion of about 5-6 inches (Fig 5.10).
FIGURE 5.10
Frost damages to shoot apices, inflorescences and mango young plants in
January 2013.
Early flowering in some mango cultivars during December was found
subjected to frost injuries (-0.2 °C to −1.2 °C on 9th and 10th January,
