DEPARMENT OF PLANT PATHOLOGY

The department Of plant Pathology offers courses for Undergraduate studies and Graduate program leading to M.S. and Ph.D. degree . The department has major programs on disease management, mycology, nematology, virology, bacteriology and general Plant Pathology. It has well developed Laboratories with modern facilities.

Course Title   : Fundamentals of Plant Pathology

Course Code  : PLP212

Course Credit   :3+1.5

Theory ( 3.0Cr.hr.)

1. Introduction
   • Définition of Plant Pathology
   • What is plant disease? (Concept of plant disease.
   • Objective of plant Pathology.
   • Significance of plant disease.
   • Important disease occurred in Bangladesh.
   • Causal agents of plant disease
2. Animate causes (infectious disease) Fungi Bacteria,

Viruses, nematodes, rickettsia like organism, phvtoplsdms & spiroplasma, algac and phancrogamic parasite.

1. Inanimate causes 9non-infection disease); Abnormal temperature , humidity, rainfall, air flow, light. Inadequate oxygen, air pollution, deficence or excess supply of nutrients, soil minerals, toxic to plants, pesticide injuries, improper cultural practices.
   • Brief history of plant pathology.
2. Fungi
   • General characteristics of fungi
   • Vegetative structures ; Fungal cell structure, thallus, modifications of fungal hyphae (plectenchyma); prosenchyma, pseudoparenchyma), rhizomorph, sclerotium, chlamydospore, haustoria, my-corriza (cctomycorrhiza, endomycorrhiza, eetomycorrhiza)
   • Reproduction in fungi; vegetative, asexual and Sexual.
   • Classification of fungi; Mastigomycotina and Zygomycotina, Asscomycotina, Basidiomycotina, Deuteromycotina.
   • Study on the characteristic features of class, order and family of the following genera ;

             Synchytrium, Phyhium, phytopthora, paonospora, Albuga,

             Rhizopus, Saccharomyces, penicillium,  

             Aspergillus,       Erysiphae, Claviceps, puccinia,

             Uslagi & Agaricus.

                                                                                                            3.Bacreria

(i)         General characteristic

(ii)         Morphology; Cell size, Cell shape, Cell rigidity  

             &   flexibility, cell boundary layers; Membrane

                 And cell wall.

• Cell arrangement, flagellation and locomotion
• Capsule and other surface structure.
• Bacterial nucleus and other intracellular organelles.
• Cell division and reproduction and Variability in bacteria
• Genera of plant pathoge                     Clavibacter (Corynebastrium), Ewinia (pantoea), Pseudomonas. Ralstonia, Streptomyces, Xanthomonas, Syllela.
• Phytoplasma & Spiroplasma; Characteristies,

4. Nematodes
   • General characteristics
   • Morphology and anatomy; Body colour, body symmetry, body shape, body size, body wall.
   • Lip of cephalic or head region; oral aperture, recturm, or prestoma, stoma, buccal cavity or stomata cavity.
   • Tail
   • Digestive system: Style, esophagus, intestine, rectum, and anus.
   • Reproductive system : Female reproductive system _ ovary, uterus, oviduct, vagina, spematheca, and male reproductive system testis, seminal vesicle, and vasdeferens.

5.Viruses and Viroid

• What is Viruses and Viroid?
• Characteristic of plant Viruses: Morphology, viral strucature.
• Composition and strucature. Of Viruses
• Infection virus infection
• Groping of viruses.

6. Algae

                       (i)         Characters of algal parasite

                       (ii)       Example of and algal disease: Red rust of mango, guava and citrus caused by algae.

7. Parasitic flowering plants

       (i) Parasitism: Epiphytes, Hemi-parasites, Holoparasite.

       (ii) Classification of the parasitic flowering plants: Stem parasites (semi-parasites: Dendrophthoe or Loranthus, Holoparasites: Cuscuta, Root parasites: Holoparasites (Orobanche), Semi- parasites (Striga).

Practical (1.5 Cr.hr.)

1. Laboratory Methods

            (i) Lab equipment and instruments

          (ii) Microscopy

           (iii) Nutrition of fungi (metallic element, non-metallic, macro elements, micro elements)

           (iv) Culture of plant pathogenic microorganisms in the laboratory

2. Study on symptoms of plant diseases.
3. Preparation of specimens of plant pathogens and observation under a compound microscope.
4. General characters of fungi
5. General characteristics of nematode
6. Culture of fungi n the laboratode
7. Study on Zygomycetous fungi
8. Study on Ascomycetous fungi
9. Study on Imperfect fungi
10. Study on parasitic higher plants.

Course Title   : principles of Plant Pathology

Course Code   : PLP315

Course Credit   :3+1.5

 

Theory ( 3.0 Cr.hr.)

1. Introduction to Plant Pathology : Some historical and Present examples of losses caused by plant diseases, plant disease and world crop production.
2. Pathogenesis: Parasitism and pathogenecity, Chain of events in disease development; disease cycle Role of toxing in disease development ; Effect of pathogens on plant physiology.
3. Ecology, survival and mode of spread of plant pathogens-fungi, bacteria, viruses and nemetodes.
4. Epidemiology of plant disease and disease triangle ; Factors of epiphytotic development of plant disease ; Inoculum potential and Disease potential ; Disease severity.
5. Introduction to Molecular Plant Patholgoy.
6. Disease Surveillance, assessment of disease intensity, disease forecasting and yiely loss assessment
7. Principles of plant disease management: Exclusion, eradication, legislative, immunization and resistance.

• Quarantine : Domestic, international, embargo and phytosanitary certificate, Eradication-Eradicants, Physical, chemical and cultural methods of readication.
• Protection : Cultural, Biological and chemical; classification of fungicides-protectionst, erdicants, therapeutants; copper, sulfer, mercury, heterocyclic nitrogenous compounds, systemic fungicides and antibiotics; characteristics of ideal fungicides ; formulation of fungicides; methods of application of fungicides-seed, soil and foliar applications, special methods; compatibility with other pesticides; phytotoxicity of fungicides, shelf life of fungicides ; precautions and safety measures during handling fungicides.  
• Host resistanc: Type of resistance-vertical and horizontal resistance : Variation in plant pathogens, genetics of host parasitic interaction, mechanisms of resistance, mechanical and chemical, per-inflectional and post-inflectional defense mechanism.
• Biological control of plant diseases: Antagonistic fungi ; bacteria, mycorrhyzal fungi, bacteriophases, plant products and antiviral principles.
• Biotechnological approaches to control plant diseases : Production of virus free plants by merstem culture, somaclonal vari-arion, Genetic engineering-plant clinic,organization and their role in disease man-agement.

8.Integrated approach to control to control crop diseases.  

 

Practical ( 1.5 Cr hr.)

1. Inoculation techniques of fungi, bacteria, viruses and nematodes
2. Practice of Koch’s postulate
3. Formulation of fungicides, calculation of dosage and preparation of fungicidal suspensions.
4. . Appliances for application of fungicides and nematicides.
5. Demonstration of application of fungicides- seed treatments, soil and foliar application, laboratory and field evaluation of fungicides.
6. Multiplication and application of biocontrol argents for disease control.
7. Study of phytotoxicity.
8. Visit to plant Quarantine Station
9. Each of the students is required to submit a comprehensive report on the

     prepared herbarium, spray experiment and field excursion.  

 

Course Title         : Diseases of field crops

Course Code        : PLP 340

Course Credit      : 3+1.5

 

Theory ( 3.0 Cr hr.)

Etiology, symptoms, mode of spread, survival of pathogen, epidemiology, disease cycle and management of diseases of different field crop:

• Diseases of cereals: Rice, wheat, maize, sorghums, barley, millets.
• Diseases of fibre crop: Jute, kanaf, Mesta, cotton.
• Diseases of oil seed: Mustard, sesame, sunflower, groundnut, soybean,
• Diseases of Pulses: Biackgram, mungbean, graangram, peas, lentil, chickpea, cowpea.
• Diseases of sugar crops: Sugarcane, Sugar beet .

 

Practical ( 1.5 Cr hr.)

1. Collection and preservation of disease specimens.
2. Study of symptoms and causal agents of the major diseases of rose, wheat maize, jute, sugarcane and pulse and oil seeds.
3. Visit to fields for observation and collection of disease specimens.
4. Each student need t submit a herbarium having at least 50 disease specimens.

 

Course Title         : Diseases of Horticultural and Plantation Crops

Course Code        : PLP 440

Course Credit      : 3+1.5

Theory ( 3.0 Cr hr.)

Etiology, symptoms, mode of spread, survival of pathogen, epidemiology, disease cycle and management of diseases of different horticultural crops.

• Disease of Fruits- Mango , Banana, Drapes, Citrus, Guava, Papaya, Coconut, Pineapple, Jackfruit, Water Melon & Muskmelon.
• Disease of Vegetables – Brinjal, Tomato, Cauliflower, Cabbage, radish, potato, Sweet, potato, Okra, Beans & Cucurbirs.
• Diseases of Spices: Chilies, Turmeric, Ginger, Onion, Garlic, & black pepper.
• Diseases of Flowers: Rose, Chrysanthemum, Marigold, Dahlia & Tuberose.
• Diseases of seedlings in the nursery and seedbed.
• Diseases of agro-forestry trees
• Diseases of narcotic and beverage crops: Tea, tobacco, betelnut, betelvine.
• Diseases of important medicinal plants.

 

 

Practical ( 1.5 Cr hr.)

1. Study on symptoms and causal agents of the major diseases of the important fruit, vegetable, spices and narcotic & beverage crops.
2. Study on symptoms and causal agents of the major disease of the nursery.
3. Visit of field for observation and collection of disease specimens.
4. Each student need t submit a herbarium of 50 disease specimens.

Course Title         : Post Harvest Pathology

Course Code        : PLP 480

Course Credit      : 3+1.5

 

Theory ( 3.0 Cr hr.)

 

Seed Pathology

1. Introduction to seed pathology: seed-borne diseases of crops and their significance in crop production, list of major seed- borne diseases of major crop of Bangladesh.
2. Mechanism of seed transmission of pathogens.
3. Seed health test.
4. Production of disease free seed of major crops grown in Bangladesh.
5. Deterioration of seed in storage.

 

Post harvest Pathology:

6. Concepts of post harvest loss of vegetables, fruits, tuber & root crop and spices of per- shambles: Transit, storage and market loss; Extent of post harvest loss and its

(i) Harvesting of produce- Concept of maturity, maturity indices,           considerations during harvesting, pre-harvest treatment of produce- trimming,         cleaning, water elimination, curing waxing and grading.

(ii) Packing house preparation-purpose and function of parking house, packaging and transport of produce- Function of packaging, damage caused   during packing, improving package performance.

(iii) Transportation-Bulk transport condition.

(iv) Storage and marketing-Storage and market environment and duration.

7. Post harvest disease: Types of diseases, source of infection, factors affecting disease development.
8. Management of post harvest diseases.

Practical ( 1.5 Cr hr.)

1. Demonstration of the methods on seed health testing-dry inspection, incubation method, growing on test.
2. Seed treatment against seed-borne pathogen.
3. Seed treatment against seed-borne pathogen.
4. Visit to the market t collect post harvest diseases and loss assessment.