What causes ratoon stunting disease?
What causes ratoon stunting disease?
Ratoon stunting disease (RSD), one of the most important diseases of sugarcane worldwide (7), is caused by a xylem-lim- ited bacterium, Clavibacter xyli subsp. xyli. The pathogen can be spread during propa- gation in infected cuttings from field to field or mechanically on equipment from plant to plant within a field.
What is RSD in sugarcane?
Ratoon stunting, also known as ratoon stunting disease (RSD), is considered by many sugarcane pathologists to be the most important disease affecting sugarcane production worldwide, because it can cause 5% to 15% crop yield losses without growers even realizing their fields are infected (Comstock 2002; Davis and Bailey …
What do you mean by red rot of sugarcane?
Red rot (important in Indonesia and South Asia) is characterized by interrupted red and white patches within the cane along with a sour alcoholic odour when the cane is split open. Caused by the fungus Colletotrichum falcatum (Glomerella tucumanensis), red rot first attracts attention by…
What causes wilt of sugarcane?
Wilt in sugarcane is caused by the fungal pathogen, Fusa- rium sacchari (Butler) W. Gams. The disease was reported for the first time in India by Butler (1906) from Bihar. Later the disease was reported to cause damages in the states of Uttar Pradesh, Punjab and Haryana in subtropical India.
What is stunting in plants?
In botany and agriculture, stunting describes a plant disease that results in dwarfing and loss of vigor. It may be caused by infectious or noninfectious means.
How do you control grassy shoot sugarcane?
Physical method:
- Rogue out infected plants in the secondary and commercial seed nursery.
- Treat the setts with aerated steam at 50°C for 1 hour to control primary infection.
- Treating them with hot air at 540C for 8 hours and spraying twice a month with aphidicides.
What is ratoon stunting?
Ratoon Stunting Disease (RSD) was first identified as a disease (on a world basis) in Mackay in 1944. Caused by a bacterium that lives in the vascular system of the cane plant, the disease restricts the plant’s ability to carry water – leading to lower yields.
What is red rot disease?
Red rot is a very serious disease of sugarcane. It was first described by Went in 1893 (56). Since then it has been found to cause epiphytotics in different countries. The surest symptom of the disease is the reddening of the internal internodal tissues with crossbars of white patches in the reddened area.
What causes red rot?
Red rot is caused by prolonged storage or exposure to high relative humidity, environmental pollution, and high temperature. In particular, red rot occurs at pH values of 4.2 to 4.5. Sulfur dioxide converts to sulfurous acid which forms hydrogen peroxide.
What are diseases that affect sugar cane?
Among these the most important diseases are: Sugarcane smut; Ratoon Stunting Disease; Red rot; Pineapple disease; sugarcane rust and Sugarcane mosaic virus disease. Most important sugarcane diseases are systemic.
What does stunt mean in biology?
(stʌnt) vb. (Biology) (tr) to prevent or impede the growth or development of (a plant, animal, etc)
Which disease is found in sugarcane?
Viral Diseases of Sugarcane
| Sl.No | Disease Causal organism |
|---|---|
| 1. | Yellow leaf disease: Sugarcane yellow leaf virus (SCYLV) / Sugarcane yellow leaf phytoplasma (SCYP) |
| 2. | Sugarcane mosaic:Sugarcane mosaic virus (SCMV) / Sugarcane streak mosaic virus (SCSMV) |
| 3. | Leaf Fleck |
What is the symptoms of red rot?
Symptoms: The affected canes exhibit leaf colour change, from green to orange and then to yellow in the third or fourth leaf. Then the leaves start drying from bottom to top. If the fungal spores enter the leaf sheath through the leaf midrib, then reddish spots can be seen on the back side of the leaf midrib also.
Which type of disease is wilt?
Verticillium wilt is a very destructive fungal disease in cool climates. It affects several hundred species of trees, shrubs, vines, flowers, house plants, vegetables, fruits, field crops, and weeds. The causal agent is the soil-inhabiting ascomycete fungus Verticillium albo-atrum and the related V. dahliae.
How many types wilt disease?
Mortality is common for many of the important wilt diseases in the region including Dutch elm disease, oak wilt, pine wilt disease, and black stain root disease. Figure 3. Leaf wilt symptoms of oak wilt.
What is the most destructive disease of sugarcane?
Among all the diseases, fungal disease named red rot of sugarcane is the most threatening disease of sugarcane, rightly called as ‘Cancer’ of sugarcane. It causes severe loss in yield and quality of the sugarcane.
How can sugarcane disease be controlled?
Diseases
- Disease can be controlled through the application of appropriate foliar fungicides.
- The most effective method of managing the disease is through the use of resistant sugarcane varieties; if planting varieties that are susceptible to the disease then plant them in dry, well-draining soils.
Is stunting a disease?
Stunting is a syndrome where linear growth failure serves as a marker of multiple pathological disorders associated with increased morbidity and mortality, loss of physical growth potential, reduced neurodevelopmental and cognitive function and an elevated risk of chronic disease in adulthood.