Transcript Fungal Diseases in Mango

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◦ Second
level Master text
Fungal Diseases
styles
in
Mango
styles
◦ Second
level
 Third level
 Fourth
level
 Third
level
 Fifth level
 Fourth
level
 Fifth level
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Major Diseases in Mango
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◦ Second
level

Powdery mildew
 Third level

Sooty mould
 Fourth level

Anthracnose
 Fifth level

Die back
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
Stalk End rot

Red rust
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Powdery Mildew (Oidium Magiferae)
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◦ Second
level
Powdery mildew
is one of the
most serious diseases of mango affecting
 Third
almost all the varieties
in level
all mango growing areas.
 Fourth level
 Fifth level
It causes approximately 20% crop loss in Maharashtra.
Sometimes as high as 70-80 per cent crop loss has been recorded on
individual plant basis.
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Symptoms
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The
characteristic
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text symptom
styles
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of the
disease is the white superficial
Second level
powdery fungal growth on leaves,
 Third levelstalks of panicles, flowers and young
fruits.
 Fourth level
 Fifth level
The affected flowers and fruits drop
prematurely reducing the crop load
considerably or might even prevent the
fruit set.
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Favorable Conditions
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Second
level
Rains or mists accompanied by cooler nights during flowering are
 Third level
congenial for the disease spread.
 Fourth level
 Fifth level
The fungus parasitizes young tissues of all parts of
the inflorescence, leaves and fruits.
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Management practices
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Spray the following
fungicides
at 15
days interval
for styles
effective control
of the disease:◦
Second level
 Third level


 Fourth
level0.2 per cent
Wet table
sulphur
 Fifth level
(2 g /1lit.water)
Tridemorph 0.1 per cent
(1 ml / lit. water ).
Dinocap 0.1 per cent
(1 ml / lit. water).
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Sooty mould (Meliola mangiferae)
Symptoms:
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◦ Second level
The severity of infection depends on the honey dew secretion
 Third level
by the above said
insects.
 Fourth
level
 Fifth level
Honey dew secretions from insects sticks to the leaf surface
and provide medium for fungal growth.
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Presence of a black velvety coating (sooty

mould)on the leaf surface
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◦ Second
level
Transmission by Insect vectors
 Third level
 Fourth level
 Fifth level
 Mealy bug
 Scale insect
 Hoppers
Common in most of the orchards
In severe cases the trees turn completely
black due to the presence of mould over the
entire surface of twigs and leaves.
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Management practices
◦ Second level
 Third level
 Fourth
level
Pruning of affected
branches
and their prompt destruction prevents the
 Fifth level
spread of the disease.
Spraying of 2 per cent starch is found effective.
It could also be controlled by spray of Nottasul + Metacin + gumacasea
(0.2% + 0.1% + 0.3%).
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Anthracnose
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The disease causes
serious
losses to young shoots, leaves stem, flowers
◦ Second
level
and fruits under favorable
climatic conditions of high humidity, frequent rains
Third level
oC.
and a temperature of
24-32level
Fourth
 Fifth
The disease produces
leaflevel
spot, blossom blight, wither tip, twig blight and
fruit rot symptoms.
Tender shoots and foliage are easily affected which ultimately cause ‘die
back’ of young branches
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Symptoms
Flowers:
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◦ Second level
Third
level(flower
on the
panicles
 Fourth level
clusters) start as small black or dark Fifth level
brown spots.
Infections
These
can enlarge, coalesce and
kill the flowers.
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Fruits:
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◦ Second level
 Third level


Fourth levelto black
Prominent dark-brown
 Fifth level
decay spots or “tear stains”.
Fruit infections are common and
can create severe decay of fruits
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Leaves:
◦ Second level

 Third level
Infections  Fourth
leaf level
as small,
 Fifth level
angular, brown to black spots.
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Second
level
Stem:
 Third level
 Fourth level
Dark-colored to Fifth
blacklevel
lesions
can
form
on
green
stem
tissues.
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Management practices
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◦ Second level
Spray twice with Carbendazim (0.1%) at 15 days
 Third level
interval during flowering to control blossom
 Fourth level
infection.
 Fifth level
Spray Copper fungicides (0.3%) for
the control of foliar infection.
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Die Back(Botryodiplodia theobromae )
Symptoms:
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styles
◦ Second
level trunk of infested
Disease occurs
on the branches/
 Third
levelat first and branches
trees that start drying
slowly
become completely Fourth
dried / level
killed, resulting gummy
 Fifth level
substance oozes out or remains hanging on the tree
.
The disease is characterized by drying of twigs and
branches followed by complete defoliation, which gives the
tree an appearance of scorching by fire.
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The young green twigs start withering first at the
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◦ Second level
base and then extending outwards along the
 Third level
veins of leaf edges.
 Fourth level
The affected leaf turns
brown
 Fifth
leveland its margins
roll upwards. Leaves scorch and fall, leaving a
dead branch.
In severe conditions, branches start drying one
after another in a sequence resulting in death of
the whole tree.
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Management Practices
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◦ Second level
Prune the diseased
twigs
and spray with Copper oxychloride (0.3%) on
 Third
level
infected trees.
 Fourth level
 Fifth level
Pruning should be done in such a way that the twigs are removed 2-3
inches below the affected portion.
In small plants, pruning of twigs is followed by pasting of Copper
oxychloride
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Red rust (Cephaleuros virescens)
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◦ Second level
Disease, caused by an alga, has been observed in mango growing
 Third level
areas.
 Fourth level
 Fifth level
The algal attack causes reduction in photosynthetic activity and
defoliation of leaves thereby lowering vitality of the host plant.
The disease is more common in closely planted orchards.
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Symptoms
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Rusty redspots
mainly
leavesMaster
text styles
◦ Second level
and sometimes on petioles and
 Third level
bark of young twigs
and islevel
 Fourth
epiphytic in nature
 Fifth level
The spots are greenish grey in color
and velvety in texture, later they turn
reddish brown
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Management Practices
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◦ Second level
 Third level
Two to three sprays of Copper oxychloride
 Fourth level
 Fifth
level
(0.3%) control
the
disease
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To sum up
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• Fungal diseases are adversely affect the yield and quality of fruits.it
◦ Second
level
may be occur
in leaves,
twigs, stem and fruits. They are powdery
mildew, sooty
mould,level
anthracnose, red rust, die back, stalk end rot.
 Third
• Powdery mildew – white powdery growth on leaf surface, stalks of
 Fourth level
panicles, flowers and young fruits - application wettable sulphur 0.2%
 Fifth level
• Sooty mould – presence of a black velvety coating – spraying of 2%
starch
• Anthracnose – Prominent dark-brown to black decay spots on leaves,
flowers, fruits and twigs - Sprayed twice with Bavistin (0.1%) at 15
days interval
• Red rust – Rusty red spots on leaves - three sprays of Copper
oxychloride (0.3%)
• Die back – Affected plants, twigs die from the tips back into old wood Prune the diseased twigs and spray with Copper oxychloride (0.3%)
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