Anthracnose of jute prentation
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Contents Introduction. Causal organism. Systemic position. Symptoms. Diagnostic characters of the casual organism. Control Strategies. Conclusion. References
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5) Stone Graft Mortality
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7) Die-back
8) Red rust
9) Loranthus or giant mistletoes
10) Spongy tissue of Mango
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Anthracnose is a fungal disease of grapes that reduces fruit quality and yield. It was introduced to the US in the 1800s from Europe. Symptoms appear as lesions on shoots, leaves, tendrils, young shoots, and berries. On shoots, lesions are small and isolated with a violet to brown margin. On leaves, lesions are circular with brown or black margins that cause a shot-hole appearance when the tissue drops out. On berries, small reddish circular spots develop with a dark brown to black margin and velvety whitish gray center. The fungus overwinters in infected plant material and produces spores during wet weather that infect plants, causing more lesions. Proper sanitation,
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Diseases of cotton -
1. Root rot
2. Wilt
3. Anthracnose
4. Black arm
5. Dahiya diseases or Grey mildew
6. Leaf curl
7. 2-4-D injury
Acidovorax
Acidovorax
Acidovorax is a genus of Proteobacteria.
Typically are plant pathogens and infections are extremely rare in humans.
Microbiological properties:
Straight to slightly curved rods, 0.2–1.2 × 0.8–5.0 µm.
Occur singly, in pairs, or in short chains.
Gram negative.
Motile by means of one or rarely two or three polar flagella.
Obligate aerobic
Most strains do not produce pigments on nutrient agar, but some phytopathogenic strains may produce a yellow to slightly brown diffusible pigment.
Oxidase positive
Urease activity varies among strains.
Acidovorax strains can be isolated from soil, water, and infected plants.
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The document discusses diseases that affect several fruit crops including mango, banana, and citrus. For mango, it describes the symptoms and management of powdery mildew, anthracnose, and red rust. For banana, it covers yellow and black sigatoka, Panama wilt, Erwinia rhizome rot, banana bunchy top virus, and anthracnose. Finally, for citrus it discusses gummosis and citrus canker, outlining the causal organisms, symptoms, and recommended control measures for each disease.
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pptno-14potato-210427070740.pdf
This document summarizes several potato crop diseases including early blight caused by Alternaria solani, late blight caused by Phytophthora infestans, black scurf caused by Rhizoctonia solani, and various mosaic and leaf roll viruses. It describes the symptoms, etiology, and disease cycles of each as well as recommended management practices such as using disease-free seed, crop rotation, removing debris, and fungicide applications to control the fungal diseases. Viral diseases are managed using resistant varieties when available, roguing infected plants, and controlling aphid vectors with insecticides.
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Anthracnose of jute prentation
- 1. Presentation on Anthracnose of Jute Course Code: AG 3206 Course Title: Principles of plant pathology & disease field crops(P) Presented by Habibur Rahaman Department of Agriculture Noakhali Science and Technology University
- 3. Contents Introduction. Casual organism. Systemic position. Symptoms. Diagonistic characters of the casual organism. Control Strategies. Conclusion. References.
- 4. Introduction On the two cultivated species of jute(Corchorus olitorius),anthracnose caused by Colletotrichum corchori. Anthracnose infects the stems,leaves,tendrils & young shoots. Temperature & moisture are the key components in influencing disease development. Anthracnose can be very damaging during heavy rainfall and hail. Active cell division round the seat of infection by the pathogen appeared to be the only factor responsible for checking the spread of the fungus.
- 5. Casual organism: Colletotrichum corchori Systemic position: Sub-division: Deuteromycotina Class: Coelomycetes Order: Melanconiales Family: Melanconiacea Genus: Colletotrichum Species: Colletotrichum corchori
- 6. Symptoms The irregular dark to block to black coloured sptos of about 1cm in length and a few mm in width are present on stem. Several spots coalesced together and produced large cankerous (necrotic and sunken) lesions.
- 7. Symptoms Cracks developer in the centre of the lesions and the fibrous are exposed. The fungus produces acervuli in the spots and the characteristics bristles (seta) can be seen on these acervuli when observed by hand lens. It is a seed born
- 8. Diagonistic characters of the casual organism Mycelium: Mycelia are immersed hyaline at young stage but pale brown to dark brown at maturity, septate and branched. Acervulus: Acervuli are epidermal or sub-epidermal septate or confluent, composed of hyaline to dark brown, thick or thin walled cells, bearing conidiophores, setae and conidia.
- 10. Diagonistic characters of the casual organism Seta: Setae in acervuli are needle like structures, black and smooth, septate acutely pointed at the apex. Conidiophores: Conidiophores are short, simple, aseptate, hyaline to brown in color, smooth, cylindrical developed from upper cell of stroma in densely. Conidium: Conidia are produced abundantly, hyaline, aseptate, falcate (sickle shaped) and
- 11. Control Strategies Anthracnose is economicaly important because it can reduce fruit quality and yield,as well as weaken the stem. Avoid submergence conditions,grow capsularis types in such areas. Destroy diseased parts during dormant season and it will reduce overwintering inoculum. Proper air circulation Liquid lime sulfur spray can be effective. Spray the crop twice a week with 0.2%blitox solution.
- 12. Conclusion Bangladesh provides over 90% of the worlds raw jute fiber exports.So Bangladesh exports a big amount of jute products in world market.Due to pathogen 39.4% yield can be loss.To get rid of this loss proper control strategies must be taken.
- 13. References: https://www.semanticscholar.org/paper/Colletotrich um-species-associated-with-jute-L.)-in-Niu- Gao/902eb45c83d95fdba3c543f537efff014c6a878 e http://agritech.tnau.ac.in/crop_protection/crop_prot _disease_faqs.htm https://www.slideshare.net/tarangvekariya/jute-and- tomato-seed-production-76627517