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Diseases of Mango
1.
2. Anthracnose- the latent invisible
infection is preset in the green fruit in a
dormant state, and becomes active during
the ripening process. Note that fruit
symptoms may not become evident until
the fruit arrives at the market. Dark brown
to black spreading lesions can occur
anywhere on the fruit, but two forms have
specific names: tear stain ad stem end
anthracnose. The tear-stain lesions are the
result of fungal spores carried down the fruit
surface in dew or rain droplets.
3.
4. Powdery Mildew- The disease affects
inflorescence, leaves and young fruits.
The characteristics symptom of the
disease is the white superficial powdery
growth of the fungus comprising a
large number of conidia borne on
conidiophores. The disease can be
managed by pruning of diseased leaves
and malformed panicles.
5.
6. Dieback- The disease is
characterized by dying back of
twigs from top downwards
particularly in order trees followed
by dying of leaves. Dark patches are
seen on young green twigs. Cracks
are seen on branches and gum
exudes from the cracks before its
death.
7.
8. Phoma Blight- Disease initially starts
as minute, irregular, yellow to light
brown scattered spots on all over the
leaf lamina. Characteristic feature of
fully developed spots are dark brown
margin and dull necrotic grey centers.
In severe cases spot coalesce and form
big patches resulting in withering and
defoliation of infected leaves.
9. Scab- the casual pathogen of disease is
Elsino mangiferae. It affects leaves,
panicles, blossoms, twigs, stem bark ad
fruits. The symptom produced by the
pathogen is almost similar to
anthracnose but lesions produced are
smaller than anthracnose on leaves and
down surface is covered by delicate
velvety growth.
10. Black Banded- Disease symptom
appear in the form of black velvety
fungal growth on midribs, twigs,
and branches of mango tree. The
infected portion of bark contains
mycelial growth and cluster of
conidiophores which confined to
upper layer only.
11.
12. Mango Malformation- vegetative
malformation is more pronounced on
young mango seedlings and plants. The
affected plants developed swollen
abnormal vegetative growth with short
internodes. The characteristic
symptoms of the floral malformation
are compact and clustery appearance of
flower.
13.
14. Mango Bacterial Canker Disease
(MBCD)- Lesions on leaves are angular
to irregular, dark brown to black,
cankerous on lower side but
occasionally on both sides and
surrounded by chlorotic halo. Fruits
may drop off, if infection comes at stem
end. MBCD can be minimized by
regular inspection of orchards and its
sanitation, use bio-control agents for
pest.
15. Red-Rust- The disease is caused by
algae, and manipest itself in the form
of rusty red fructification of the alga on
the surface of leaves, petioles and
twigs. Initially the spots are greenish
grey and velvety in texture which
finally turn to reddish brown, after
shedding the spore the algal matrix
remains attached to leaf surface,
leaving a creamy white mark at the
original rust spot.
16.
17. Black Rot- It is a post-harvest disease
caused by Aspergillus niger van tiegh.
Affected fruits show yellowing with irregular
grayish spots, which develops into black
necrotic area with growth of black mould.
Tissues around and beneath the spots
disintegrates and emits foul odor. The
disease can be managed by avoidance of
injury to fruits and its contact to soil,
dipping of fruits in hot water and covering
of fruits with brown or newspaper on the
tree itself 15 days prior to harvest.
