What is Lakshmi disease?
Also known as Lakshmi disease, it is caused by a fungus and was believed to be an indication of a bumper crop in the year. Due to the infection, individual grains of the panicle get transformed into greenish spore balls of velvety appearance.
Which is responsible organism for black spot of rice?
Bipolaris oryzae is the causal agent of rice brown spot disease and is responsible for significant economic losses.
What is black arm of cotton?
noun Plant Pathology. a type or phase of bacterial blight of cotton, characterized by black, elongated lesions on the stem and branches, caused by a bacterium, Xanthomonas malvacearum.
How do you control rice disease?
The four most important strategies for rice disease management are to rotate crops, plant resistant varieties, plant in warm soil and use fungicides when necessary. An integrated approach that uses all of these methods is the most effective and profitable.
Which disease is known as killer disease of rice?
rice bacterial blight
rice bacterial blight, also called bacterial blight of rice, deadly bacterial disease that is among the most destructive afflictions of cultivated rice (Oryza sativa and O. glaberrima). In severe epidemics, crop loss may be as high as 75 percent, and millions of hectares of rice are infected annually.
What is brown spot disease?
Septoria brown spot (also called brown spot) is common leaf disease of soybean across the Midwestern U.S. It’s incidence can be high but it rarely develops to cause significant yield loss. Yield losses of five to eight percent may occur under severe conditions when much defoliation occurs.
Why blast is called rich man’s disease?
For centuries, gout has been known as a “rich man’s disease” or a disease caused by overindulgence in food and drink.
What is rice blight?
rice bacterial blight, also called bacterial blight of rice, deadly bacterial disease that is among the most destructive afflictions of cultivated rice (Oryza sativa and O. glaberrima). In severe epidemics, crop loss may be as high as 75 percent, and millions of hectares of rice are infected annually.
What is angular leaf spot?
Angular leaf spot is a bacterial disease caused by Pseudomonas syringae pv. lachrymans. Although angular leaf spot can infect any of the cucurbit crops, it is less common on cucumber due to the availability of resistant varieties. Angular leaf spot thrives in warm humid conditions.
When do you apply fungicide to rice?
Generally speaking and similar to a herbicide application, fungicide applications should be made when the wind is low.
What are the five common diseases of rice?
Diseases
- Bacterial blight.
- Bacterial leaf streak.
- Blast (leaf and collar)
- Brown spot.
- False smut.
- Rice grassy stunt.
- Rice ragged stunt.
- Sheath blight.
What are the symptoms of rice blast?
Blast symptoms appear on leaves as elliptical spots with light-colored centers and reddish edges. The most serious damage from rice blast occurs when the disease attacks the nodes just below the head, often causing the stem to break.
What causes wilt disease?
Wilt diseases disrupt this flow of water in the xylem, thus causing leaves to wilt. These diseases result from pathogen activity in the vessels or tracheids. Wilt pathogens are parasites that can move through the vascular tissue of trees. The pathogens can include fungi, nematodes, bacteria, or other micro-organisms.
How do you treat brown spots?
Here are the key steps to treating Brown Patch:
- Water only in the morning.
- Try to reduce watering as much as possible until the disease is gone.
- Aerate the soil in the affected areas.
- Aerate the entire lawn to stop further outbreaks.
- Stop fertilising until the lawn is recovered.
- Apply a fungicide if necessary.