Gummy stem blight is a leaf and stem disease of may vegetables and plants caused by fungal infection. It is a roting disease.
Specially the plant cucumber suffers with this disease. The symptom includes in the cucumber leaf that from the corner of the leaf or leaf edge started to discolouration. It turned into yellow to dark brown. Brown spot may surrounded with yellow color.
Pathogens are these microorganism that causes significant harm of living organism. The organism that causes good effect in animals body is termed as normal flora.
A lot of microorganism found that belongs with any animal and produce mutual beneficial effect. This is symbiotic relationship. Examples of symbiotic relationship are azetobactor with legume and causing of nitrogen fixation into soil.
Bacteria involved in digestive system that causes effective digestion.
The pathogens causes disease. There have different types of pathogens.
Bacteria : Clostridium titani
Virus : Tobacco mosaic virus
Fungus :
Protozoa
Nematodes
A common fungus of the colletotrichum genus causes anthracnose. The scientific name of anthracnose causing pathogen is colletotrichum corchorii.
The infection happens mainly in leaves and stems. It causes the yellowish brown and water soaked lesson color of the stem. The fragmentation of fibre is one of the unique symptom.
It is a cool winter season disease. Cool weather promotes disease to cause. Moisture also promotes the fungus development. In optimum temperature 75 -85 degree farenhite the infection and disease development triggers.
Verticillium wilt is a disease of cotton plant caused by vertecillium dhalphia. The infection spreads through root.
Symptom
Tiger stripes leaf symptom
During square and ball formation stage the plant is affected.
Bronging found in vein
The pathogen survival
Pathogen can survive in plant debris. In soil it can survive 14 years as microsclerotia.
In cool heavy soil with alkaline environment pathogen can develop well. The soil with excessive nitrogen fertiliser is a favourable condition for infection.
Rice productivity is mostly depends on rice health. Different types of disease impacts on rice productivity.
Rice may suffer in different types of diseases that is caused by different pathogen.
Blight sheath disease
Tungaro disease
Blight leaf disease
Sheath blight is a fungal disease caused by Rhizoctonia solani. The symptomatic expression of the disease is as bellow,
Water soaked
Greenish grey spot in sheath
Sclerotia forming in infected tissue
In high humidity and temperature disease can spread easily. Moreover, excess nitrogen and plant density may also triggers the disease.
Fusariun oxysporam is a pathogen that causes Fusarium wilt disease. Specially in cotton plant this disease is found.
The symptom includes in fusariam wilt disease is as bellow,
Yellowing and browning of cotyledons. Browning of petioles.
Leaves loss of turgity
Leaf falling and willing
Leaf yellowing
Black brown of vascular tissue
The pathogen have the following characteristics
Survive in saprophyte for long years
Clamydophores act as a resting spores
Seed born pathogen
Spreads through dormant seed, hyohae and clamydospores
May spread by air and water irrigation
Hot and humid condition is favourable
Gummy stem blight is a leaf and stem disease of may vegetables and plants caused by fungal infection. It is a roting disease. Specially the...
