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- How do you control false smut in rice crops?
- What causes false smut in rice?
- What is false smut disease?
- Is False smut seed borne?
- What is rice disease?
- What is bacterial leaf blight?
- Which disease of banana is caused by bacteria?
- What is Favourable condition of rice blast organism?
- What is sheath blight disease?
- How do you control false smut disease?
- How do you manage downy mildew disease of maize?
- Which is caused by abiotic factors?
How do you control false smut in rice crops?
Monitor fields for signs of the disease. Keep field bunds and irrigation channels clean. Keep the field clean of weeds and remove infected plant debris, panicles and seeds after harvest.
What causes false smut in rice?
The disease can occur in areas with high relative humidity (>90%) and temperature ranging from 25−35 ºC. Rain, high humidity, and soils with high nitrogen content also favors disease development. Wind can spread the fungal spores from plant to plant. False smut is visible only after panicle exsertion.
What is false smut disease?
False smut is caused by a fungus and is also known as Lakshmi disease or Oothupathi disease of rice. The typical symptom of the disease is black fungal mycelium growth in paddy grains which become covered with yellow fungal growth in the field.
Is False smut seed borne?
False smut is a soil, seed and air borne fungal disease. It causes reduced rice quality and means farmers get a low market price. The pathogen that causes false smut can survive in soil from harvesting time to flowering time of next crop.
What is rice disease?
2.1, three fungal diseases, blast, sheath blight and sheath-rot, the bacterial disease, bacterial blight (BB) of rice and the viral disease, rice tungro disease (RTD), are listed as major diseases of rice. The list may not be entirely correct for certain rice ecologies of the world.
What is bacterial leaf blight?
What it does. Bacterial blight is caused by Xanthomonas oryzae pv. oryzae. It causes wilting of seedlings and yellowing and drying of leaves.
Which disease of banana is caused by bacteria?
Table 1
| Common name | Distribution and hosts | Traditional taxonomy |
|---|---|---|
| Xanthomonas bacterial wilt of banana and enset (enset wilt, banana bacterial wilt) | Ethiopia, Uganda, DR Congo, Rwanda, Burundi, Tanzania, Kenya (enset and all cultivated banana types). | Xanthomonas campestris pv musacearum (Xcm) |
What is Favourable condition of rice blast organism?
Conditions conducive for rice blast include long periods of free moisture and/or high humidity, because leaf wetness is required for infection. Sporulation increases with high relative humidity and at 77–82 °F (25–28 °C), spore germination, lesion formation, and sporulation are at optimum levels.
What is sheath blight disease?
Sheath blight is a fungal disease caused by Rhizoctonia solani. Infected leaves senesce or dry out and die more rapidly, young tillers can also be destroyed. As a result, the leaf area of the canopy can significantly be reduced by the disease.
How do you control false smut disease?
Preventive methods
- Use of disease-free seeds that are selected from healthy crop.
- Seed treatment with carbendazim 2.0g/kg of seeds.
- Control insect pests.
- Split application of nitrogen is recommended.
- Removal and proper disposal of infected plant debris.
How do you manage downy mildew disease of maize?
Management
- Choose hybrid varieties with known resistance to maize downy mildew; this is the most important way of managing the disease.
- Do not plant maize close to sugarcane in case of cross-contamination.
Which is caused by abiotic factors?
Abiotic disorders are caused by nonliving factors, such as drought stress, sunscald, freeze injury, wind injury, chemical injury, nutrient deficiency, or improper cultural practices, such as overwatering or planting conditions.
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