Tungro disease of Rice

 Rice tungro disease is a pathogenic disease caused by two virus transmitted by leafhopper. The scientific name of these two virus is 

Tungro is a most rice damaging disease in south east Asia. From seedlings to all growing stage of plant tungro can appear.

When any leafhopper feed any infected leaf the virus transmit to leafhopper and then when it attack on other leaf, the leaf is infect. Though, virus can not survive long time in leafhopper body.

The symptomatic expression of tungro disease is yellow orange leaf. Yellow color appears at the top of the leaf initially and expand to bottom side of the plant leaf. 

The disease can spread very rapidly. The disease can damage yielding. Disease may slower the flowering and plant growth. 

It can delay maturity. Plant may shows stunting. 

The yellowing of leaf may be confused with zinc deficiency symptom and nitrogen deficiency symptom of rice plant. Disease diagnosis test may reach in a final conclusion. ELISA and RIPA is the most popular test for tungro disease diagnosis.

Comments

Post a Comment

Popular posts from this blog

Anthracnose

 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. 
Read more

Pathogens

 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
Read more

Gummy stem blight

Image
 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.  
Read more