Kresek is a district within Tangerang Regency in the province of Banten, Java, Indonesia. The population at the 2010 Census was 60,735. Coordinates: 6°07′53″S 106°22′48″E
What is kresek stage?
Check for wilting and yellowing of leaves, or wilting of seedlings (also called kresek). On seedlings, infected leaves turn grayish green and roll up. As the disease progresses, the leaves turn yellow to straw-colored and wilt, leading whole seedlings to dry up and die.
What is 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 causes blight disease?
Blight spreads by fungal spores that are carried by insects, wind, water and animals from infected plants, and then deposited on soil. The disease requires moisture to progress, so when dew or rain comes in contact with fungal spores in the soil, they reproduce.
Which is best fungicide for rice?
The fungicides chlorothalonil, tricyclazole, hexaconazole, carbendazim, and propiconazole have been reported to be effective in the management of rice blast disease [24].
What is bacterial blight disease?
Bacterial blight is a widespread soybean disease that is most common during cool, wet weather. This disease usually occurs at low levels that don't result in yield loss. Bacterial blight can be mistaken for Septoria brown spot.
What are the symptoms of bacterial blight?
Symptoms of common bacterial blight first appear on leaves as small, water-soaked spots, light green areas, or both. As these spots enlarge, the tissue in the center dies and turns brown. These irregularly shaped spots are bordered by a lemon yellow ring, which serves as a diagnostic symptom of common bacterial blight.
What causes rice sheath blight?
Rice sheath blight disease, caused by the basidiomycetous necrotroph Rhizoctonia solani, became one of the major threats to the rice cultivation worldwide, especially after the adoption of high‐yielding varieties.
What are the symptoms of blight?
Common Blight It enters the plant through natural plant openings or wounds and can affect leaves, stems, pods, and seeds. This disease first manifests as water-soaked angular leaf spots. The spots expand over time and dry out as plant tissues die. The brown patches will be surrounded by a ring of yellow leaf tissue.
How to tell if a plant has kresek?
How to identify. Check for wilting and yellowing of leaves, or wilting of seedlings (also called kresek ). On seedlings, infected leaves turn grayish green and roll up. As the disease progresses, the leaves turn yellow to straw-colored and wilt, leading whole seedlings to dry up and die.
What causes wilting of seedlings and yellowing of leaves?
Bacterial blight is caused by Xanthomonas oryzae pv. oryzae . It causes wilting of seedlings and yellowing and drying of leaves.
How to tell if rice seedlings have kresek?
Kresek on seedlings may sometimes be confused with early rice stem borer damage. To distinguish kresek symptoms from stem borer damage, squeeze the lower end of infected seedlings between the fingers. Kresek symptoms should show yellowish bacterial ooze coming out of the cut ends.
What temperature does rice blight?
In general, the disease favors temperatures at 25−34°C, with relative humidity above 70%. It is commonly observed when strong winds and continuous heavy rains occur, allowing the disease-causing bacteria to easily spread through ooze droplets on lesions of infected plants. Bacterial blight can be severe in susceptible rice varieties ...
Why is bacterial blight important?
Why is it important. Bacterial blight is one of the most serious diseases of rice. The earlier the disease occurs, the higher the yield loss. Yield loss due to bacterial blight can be as much as 70% when susceptible varieties are grown, in environments favorable to the disease.
Why do my leaves turn yellow?
Old lesions turn yellow to grayish white with black dots due to the growth of various saprophytic fungi. On severely infected leaves, lesions may extend to the leaf sheath. To quickly diagnose bacterial blight on leaf: cut a young lesion across and place in a transparent glass container with clear water.
How to keep a plant healthy?
Use balanced amounts of plant nutrients, especially nitrogen. Ensure good drainage of fields (in conventionally flooded crops) and nurseries. Keep fields clean. Remove weed hosts and plow under rice stubble, straw, rice ratoons and volunteer seedlings, which can serve as hosts of bacteria.
