Bacterial blight

Xa2i A rice gene that confers resistance to most strains ofXanthomonas oryzae pv. oryzae. Xanthomonas oryzae A bacteria that causes bacterial blight of rice. 

Khush, G. S., E. Bacalangco, and T. Ogawa. T99r. A new gene for resistance to bacterial blight from O. longistaminata. Rice Genetics Newsletter 7 r2r—r22. 

Ronald, P. C., B. Albano, R. Tabien, L. Abenes, K. Wu, S. McCouch, and S. Tanksley. 1992. Genetic and physical analysis of the rice bacterial blight resistance locus, Xa2i. Molecular and General Genetics 236 rr3—r20. 

Cause Bacterial blight. /, U. Pods with water-soaked -or brown patches , . dr seeds yellow, i 4 blotched. ... 

VN ater-soaked spots caused by bacterial blight turn brown with a yellow halo and then become dry and brittle. See the opposite page for an illustration of this disease. Spray plants with copper to reduce the spread of the dis-... 

Bacterial blight also causes dark brown streaks on petioles. Destroy the whole plant. Spray plants with copper if bacterial blight has been a problem in the past. To prevent problems, soak seed in 122°F water for 20 minutes before planting. 

Leaves with water-soaked spots foliage and flowers blacken. C ause Bacterial blight. Infected plants turn brown and lose leaves girdled stems die. Dig and destroy infected plants and surrounding soil. Solarize soil before replanting with disease-free seed water early in the day so leaves dry quickly. 

Blights When plants suffer from blight, leaves or branches suddenly wither, stop growing, and die. Later, plant parts may rot. Common blights include fire blight, Alternaria blight, and bacterial blights. 

Choose clean seeds. Several kinds of disease organisms, including those that cause an-thracnose and bacterial blight,.can overwinter on seeds. Buy seeds from reputable companies to minimize your chances of getting infected seed. If you choose to save home-grown seed, save seed only from healthy plants and pods, and store the seeds in a cool, dry place. 

Browning, a classical symptom of plant disease, has been recognized as being caused by the oxidation of polyphenols. However, this often was considered a passive process in which phenols were allowed to mix with oxidases released from compartmentalization during breakdown of tissues by pathogens. Studies of Verticillium wilt, bacterial blight, and boll rots indicate that phenols and even the oxidases involved in browning may be formed as part of the active defense (62, 65, 88, 91). 

Stefani, E. D. Caffier N. Fiore. The economic impact of the bacterial blight of soybean under European agroclimatic conditions./. Plant Pathol. 1998, 80, 211—218. 

Rice bacterial blight (Xanthomonas oryzae Dowson) Sheath blight of rice (Pellicularia sasakii (Shirai) S. Ito)... 

The cuticle also provides a barrier to penetration by bacteria, viruses, and many fungi.Enhanced development of a bacterial blight of bean plants previously exposed to simulated acidic rain was thought to have resulted from the creation of infection courts by damage to leaf surfaces by the rainfall, as mentioned earlier. 

Bacterial blight Bacteria Dark brown lesions on leaves, stems and pods. Spread on seed. Wet windy weather favours disease. (1) Only sow healthy seed... 

Pea bacterial blight (Pseudomonas syringae) is an important notifiable disease of peas. In order to minimise the likelihood of contamination, all pea seed crops must be isolated from other pea crops by at least 50 m. 

Peas can be attacked by a range of pests including pea and bean weevil, pea cyst nematode, aphids, moths, thrips, pea midge, silver Y moth and slugs. Damping off, foot and root rot, leaf and pod spot, downy mildew, powdery mildew, botrytis, virus and bacterial blight can affect the pea erop and may need controlling. 

Peas Bacterial blight Pseudomonas syringae pv. pisi... 

Mihail, J.D., Taylor, S.J., Verslues, P.E., Hodge, N.C., 1993. Bacterial blight of Crambe abyssinica in Missouri caused by Xanthomonas campestris. Plant Dis. 77, 569-574. 

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