Plant desease and it's control
•Download as PPTX, PDF•
1 like•129 views
Botany, plant pathology, control, quarantine law
Recommended
More Related Content
What's hot
What's hot (20)
Similar to Plant desease and it's control
Similar to Plant desease and it's control (20)
More from SAIKAT JANA
Recently uploaded
Recently uploaded (20)
Plant desease and it's control
- 1. PLANT DESEASE AND IT’S CONTROL PRESENTED BY SAIKAT JANA SEM-IV DEPT. OF BOTANY NARAJOLE RAJ COLLEGE
- 2. WHAT IS PLANT DESEASE Plant desease is a particular abnormal condition that negatively effects the structure or function of all or part of a plant, caused by particular pathogens. E.g.– Stem rust of wheat Late blight of potato Tobacco mosaic desease
- 3. PLANT DESEASE BACTERIAL FUNGAL VIRUL Aster yellows Bacterial wilt Blight Canker Crown gall Rot Smut Scab Rust Rot Damping off Club root Leaf blister Anthracnose Blight Canker Black knot Curly top Mosaic Psorosis Spotted wilt Scab TYPES OF PLANT DESEASES
- 4. CONTROL OF PLANT DESEASES Desease control is very important to keep the plant species from extinction. Plant deseases are usually controlled in three ways― i. Biological control ii. Chemical control iii. Physical control
- 5. BIOLOGICAL CONTROL This is the method of protection of plants directly by total or partial destruction of pathogen population by microorganisms. PROCESS OF BIOLOGICAL CONTROL 1. Direct mechanism Direct lysis or killing of pathogen by biocontrol agent. This is two types― i. Antibiotics ii. Parasitism
- 6. i. Antibiotics Antibiotics are microbial toxins that can, at low concentration, poison or kill other microorganisms. Volatile antibiotics Hydrogen cyanide Aldehydes Alcohol Ketones Sulfides Non volatile antibiotics Polyketides Heterocyclic nitrogen compounds
- 7. ii. Parasitism This is direct utilization of pathogens as source nutrients. Mycoparasitism refers to association in which a parasitic fungus live as a parasite to another fungus
- 8. 2. Indirect mechanism Exclusion of plant pathogen as a result of the presence, activity or products of biocontrol agents. This is two types― i. Competition ii. Induced systemic resistance (ISR)
- 9. i. Competition • Exclusion of pathogens by biological control agents via competition for space or nutrients. • Production of substances for nutrient acquisition. ii. Induced systemic resistance (ISR) It also known as systemic acquired resistance (SAR), resistance in plants to varieties of pathogens induced by the presence or products of biocontrol agents.
- 10. ISR biocontrol agents may be― ● Necrogenic pathogen (applied on leaf) ● Non-pathogenic bacteria (applied to root or seed) ● Metabolites of pathogenic or saprophytic bacteria.
- 11. Application method There are five application methods of ISR― Seed treatment Seedling dip method
- 12. Soil drench Foliar sprey Irrigation drips
- 13. CHEMICAL CONTROL This is the process where plant deseases are controled by chemical compounds such as― ● Bordeaux mixture ● Burgundy mixture ● Thiram ● Ferbam ● Ziram
- 14. PHYSICAL CONTROL Physical control is the removal of weeds by physical or mechanical means, such as mowing, grazing, mulching, tilling, burning etc.
- 15. WHAT IS QUARANTINE LAW A legal restriction on movement of agricultural commodities for the purpose of exclusion, prevention or delay in the establishment of plants, pests and deseases in the area where they are not present. Plant quarantine is this designed as a safe guard against harmful pests/pathogens exotic to a country or a region.
- 16. THANK YOU