Category: Plant Pathology

Brown Rot of Potato – Instant info | Agristudent.com

Brown rot of potato

Brown rot disease of Potato is also called as Bangle blight which is the causal organism of brown rot of Potato? Bacteria called Ralstonia solanacearum what are the Symptoms of brown rot disease of potato? At the time tuber formation wilt is the main characteristic symptom. In leaf symptom – wilt, stunt and yellowing. Browning of xylem tissue. Eye buds are black in colour. Bacteria ooze coming on infected tuber surface and emits a foul […]

Common Scab of Potato: Instant Info I Agristudent.com

common scab of potato

Common scab Disease of Potato is also known as Corky scab which is the causal organism of common scab? fungus called Streptomyces scabies what are the Symptoms of common scab of potato? Corkiness of the tuber periderm is the characteristics symptoms. 1/4 inch into the tuber surface are russette appearance. Light brown to dark brown lesion appears on the infected tuber. Affected tissue will attract insects. what are the  characteristics of Pathogen causing common scab? […]

Black scurf disease of Potato – Instant info | Agristudent.com

Black scurf of potato

Blacl scurf disease of potato Which is the causal organism of Black scurf disease of Potato? It is caused by a fungus called Rhizoctonia solani What are the symptoms of Black scurf? At the time of sprouting dark brown colour appear on the eyes. Affected Xylem tissue causes to wilting of plants. Infected tuber contains russeting of the skin. Hard dry rot with browning on internal tissue. Spongy mass appear on the infected tuber. Seed […]

Tuber Rot of Potato – Instant Info | Agristudent.com

Potato tuber rot

Tuber rot of Potato is an important Post harvest disease of Potato Causal organism Fungus called Sclerotium rolfsii is the causal organism of  Potato Tuber rot Also read – Early blight of Potato Instant Info | Agristudent.com Late Blight of Potato –  Instant Info | Agristudent.com Symptoms of Tuber Rot Wilting is the initial symptom. Yellowish brown coloured Sclerotia appeared on the infected tuber. Rotting of the tuber. Milky white and floccose appearance of the […]

Early blight of Potato – Instant Info | Agristudent.com

Early blight of potato

Early blight disease of potato is an important disease of potato Which is the causal organism of early blight of Potato? Fungus named Alternaria solani is the causal organism of early blight of potato You may also like to read – Late Blight of Potato – Instant Info | Agristudent.com What are the symptoms of early blight of potato? It is present in both hills & plains. Brown-black necrotic spot-angular, oval shape characterized by concentric […]

Late Blight of Potato – Instant Info | Agristudent.com

Late blight of potato

Late blight of potato is one of the most important disease faced during the cultivation  of potato Which is the causal organism of Late blight of potato? A fungus named Phytopthora infestans is the causal organism of Late blight of Potato. How is the disease cycle of Late blight disease?   What are the symptons of Late blight of potato? It affects leaves, stems and tubers. Water soaked spots appear on leaves, increase in size, […]

Blister Blight of Tea | Agristudent.com

Blister blight of tea

Blister Blight of tea What is the causal organism of blister blight of Tea? Fungus called Exobasidium vexans What are the symptoms of blister blight of Tea? Folowing are the symptoms of blister blight of tea 1. Small pale or pinkish circular spots appear on leaves and attain a size of 2.5 cm diameter 2. The spots in the upper surface of the leaf becomes light brown in color and depressed while in under surface […]

Yellow Vein Mosiac of Okra | Agristudent.com

Yellow viem mosiac of bhendi

Yellow vein mosiac of okra How to identify Yellow vein mosaic of okra? Identify Yellow Vien Mosiac of Okra / Bhendi / Ladies finger by its characteristic  Symptoms – 1. Yellowing of the entire network of veins in the leaf blade (vein clearing) is the characteristic symptom 2. In severe infections the younger leaves turn yellow, become reduced in size and the plant is highly stunted 3. In a field, most of the plants may […]

Phomopsis blight of brinjal | Agristudent.com

Phomopsis blight of brinjal

In India, the phomopsis blight of brinjal was reported in 1935 in Gujarat How to identify Phomopsis blight of brinjal? Identify phomopsis blight disease by its characteristic symptoms – 1. The plants are attacked at all stages of growth – producing damping-off symptoms in nurseries and collar rot on young plants 2. On leaves, circular to irregular, clearly defined grayish brown spots having light centers appear 3. The diseased leaves become yellowish in colour nd […]

Alternaria leaf spot of Brinjal | Agristudent.com

Alternaria leaf spot

  How to identify Alternaria leaf Spot of brinjal? Identify the Alternaria leaf spot disease based on the following symptoms 1. Cracks appearing in leaf spot 2. The two species of Alternaria occur commonly, causing the characteristic leaf spots with concentric rings 3. The spots are mostly irregular, 4-8 mm in diameter and may coalesce to cover large areas of the leaf blade Severely affected leaves may drop off 4. A. melongenae also infects the […]

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