Disease of Guava and its Management

1. My Introduce
Name : Md. Rafiqul Islam
ID : 16109015
Program : BSAg
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2. Disease of Guava and its
Management
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3. Introduction
• Guava is a common fruit in our country.
Its scientific name is Psidium guajava.
Guava is good sources of vitamin-C and
minerals. 100 g fresh fruit provides 228
mg of vitamin-C, more than three times
the required daily recommended intake.
Some disease and management about
guava are given bellow.
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4. Disease name : Algal leaf spot
Pathogen name: (Cephaleuros virescens)
SYMPTOMS
• Orange, rust-colored,
dense, silky tufts on
both upper and lower
surfaces of leaves
which turn reddish-
purple in color as they
mature.
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5. Continue
• If tufts are scraped away, a thin gray-
white or dark-colored necrotic spot
remains on the leaf; bark on twigs and
branches may be cracked; young stems
and fruit may also be attacked.
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6. MANAGEMENT
• Ensure trees receive adequate
fertilization, irrigation.
• promote air circulation through the
canopy; periodic applications of a
copper based fungicide is usually
enough to control the disease.
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7. Disease name : Anthracnose
Pathogen name : ( Colletotrichum
gloeosporoides)
SYMPTOMS
• Sunken, dark colored
lesions on mature fruit
which may become
covered in pink spores;
lesions coalesce to form
large necrotic patches on
surface of fruit.
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8. MANAGEMENT
• Use resistant variety of guava .
• Both systemic and non-systemic
fungicides are effective at
controlling the disease and are
usually applied shortly before
flowering and during fruit
development.
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9. Disease name : Rust (fungal)
Pathogen name : Puccinia psidii
SYMPTOMS
• Orange to red pustules
appearing on leaves, young
shoots, flowers and/or fruit;
• leaves distorted; defoliation
of tree; reduced growth;
circular lesions on fully
expanded leaves with dark
borders and yellow halos.
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10. MANAGEMENT
• Application of appropriate
fungicides.
• Good sanitation practices .
• Adequate fertilization.
• Irrigation and pruning of trees.
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11. Disease name : Root knot
Pathogen name: Meloidogyne spp.
(nematode)
SYMPTOMS
• Galls on roots which can
be up to 3.3 cm (1 in) in
diameter but are usually
smaller; reduction in
plant vigor; yellowing
plants which wilt in hot
weather.
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12. MANAGEMENT
• Plant resistant varieties
• Check roots of plants mid-season or
sooner if symptoms indicate
nematodes.
• Solarizing soil can reduce nematode
populations in the soil and levels of
inoculums of many other pathogens.
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13. Conclusion
• We have already discussed about
plant disease and its management .we
should not depend on not only
chemical control but also cultural and
biological method for control plant
disease.
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14. Have any
Question
?3/28/2018 14

15. Thanks
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