Plant and Crop diseases identification

1. Crop Prot 2
Integrated Pest Management
Laboratory Exercise No. 1

2. SURVEY OF PATHOGEN-LIKE
DISEASES
IN SOME MAJOR CROPS
(e.g. Bacteria, Virus, Fungus, etc.)

3. Group No.1 (BSA 1C)
Members:
Sofia Margarette T. Juanico Raquel P. Capirayan
Catlyn Joy A. Alto Gilbert C. Cantomayor
Roland C. Cantero Roj C. Cana-an
Lee Earvin N. Laminares Chale Ivon C. Agas
Gerald John B. Palacios Ma. Frejielyn F. Olmedo

4. INTRODUCTION
• Agricultural productivity plays a crucial role in global
food security, and one of the significant challenges
faced by the agricultural sector is the impact of
pathogen-like diseases on major crops.

5. INTRODUCTION
• Pathogen-like diseases encompass a range of
conditions caused by various biotic and abiotic
factors that mimic the symptoms of pathogenic
infections. These diseases can lead to severe yield
losses, economic hardship for farmers, and
disruptions in the supply chain of essential crops.

6. OBJECTIVES
• To identify common diseases in crops,
• To familiarize symptoms of plant pathogens, and
• To determine the distribution of plant pathogenic like
infected plants in some major crops.

7. Type of diseases
Host Papaya
Name of Disease Papaya ringspot
Symptoms Leaves develop prominent mosaic
and chlorosis on the leaf lamina, and
water soaked oily streaks on the
petioles and upper part of the trunk.
Causal Agent Papaya Ringspot Virus (PRSV)

8. Type of diseases
Host Tomato
Name of
Disease
Bacterial spot
Symptoms It appears a small, round,
water-soaked spots that
gradually turn dark-brown or
black and are surrounded by
yellow halo.
Causal Agent Xanthomonas campestris pv.
Vesicatoria.

9. Type of diseases
Host Jackfruit
Name of
Disease
Rhizopus rot
Symptoms Discolored, water-soaked spots
on fruit.
Causal Agent Rhizopus stolonifer

10. Type of diseases
Host Cabbage
Name of
Disease
Alternaria leaf spot
Symptoms Dark brown to black irregularly
shaped lesions on leaf blades
and petioles.
Causal Agent Alternaria brassicicola

11. Type of diseases
Host Long Chilli Pepper
Name of
Disease
Anthracnose disease
Symptoms Irregular spots, and dead areas
on leaves that often follow the
veins of the leaves.
Causal Agent Colletotrichum or Gloeosporium

12. Type of diseases
Host Coconut
Name of
Disease
Gray leaf blight Pestalotiopsis
palmarum.
Symptoms Very small yellow, brown or black
discoloration of the leaves.
Causal Agent Pestalotiopsis palmarum

13. Type of diseases
Host Banana Leaves
Name of
Disease
Black and Yellow Sigatoka
Symptoms Very small yellow, brown or black
discoloration of the leaves.
Causal Agent Mycosphaerella
musicola/fijiensis

14. Type of diseases
Host Radish
Name of
Disease
Fusarium wilt
Symptoms Leaves on infected plants turn
yellow and fall.
Causal Agent Fusarium oxysporum f. sp.
lycopersici,

15. Type of diseases
Host Eggplant
Name of
Disease
Blossom end rot
Symptoms A large, brown to black, dry,
leathery area at the blossom end
of the tomato fruit.
Causal Agent A localized deficiency of calcium
in the fruit.

16. Type of diseases
Host Cassava
Name of
Disease
Cassava phytoplasma disease
Symptoms Significantly shorter shoots on
top of manioc plants give the
plant a "witches' broom" aspect.
Roots may develop thin and
woody with deep cracks.
Swellings of lower part of the
stems.
Causal Agent Candidatus Phytoplasma

17. Type of diseases
Host Okra
Name of
Disease
White bumps
Symptoms Blisters appears on the leaves
and the stem and the infected
plant produce deformed,
hypertrophied and hard seeds.
Causal Agent Fungus Protomyces macrosporus

18. Type of diseases
Host Watermelon
Name of
Disease
Phytophthora fruit rot
Symptoms Water-soaking of the stem. Fruits
in contact with soil with the
presence of the pathogen is
highly susceptible.
Causal Agent Fungus Phytophthora capsici

19. Type of diseases
Host Rice
Name of
Disease
Rice tungro diseases
Symptoms It causes leaf discoloration
(yellowing), stunted growth,
reduced tiller numbers & sterile
or partly filled grains.
Causal Agent Virus/GLH

20. Type of diseases
Host Corn
Name of
Disease
Stalk and ear rots
Symptoms Stalk rot pathogens decay the
central pith, which weakens the
stalk. One can envision a healthy
stalk being a solid rod of plant
tissue. A rotted stalk is no more
than a tube with decaying pith
loosely packed inside.
Causal Agent Fungus Diplodia maydis

21. Type of diseases
Host Bitter gourd
Name of
Disease
Bitter gourd Yellow Mosaic Virus
Symptoms Irregular yellowish patches on
the leaves.
Causal Agent Begomovirus (BgYMV)

22. THANK YOU!!!