By T.W. Mew, P. Gonzales
This guide makes a speciality of the $64000 seedborne fungi that reason illnesses of the foliage, stem, leafsheath, root, grain, and inflorescence in rice. It offers info on greater than 50 species which were detected in rice seed in the course of regimen checking out and analysis.
Seed well-being checking out is additionally a method of qc that guarantees the alternate of high quality seed between scientists or learn facilities. as a result, the Seed future health Unit at IFW services because the gatekeeper of secure germplasm move from and inside of IRRI, the Philippines, and out of doors.
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Extra info for A Handbook of Rice Seedborne Fungi
Syn. Neovossia barclayana Bref. Tilletia horrida Tak. ) Padw. & Kahn Disease caused: kernel smut (bunt) a. Symptoms Infected grains show very small black pustules or streaks bursting through the glumes. When infection is severe, rupturing glumes produce a short beak-like outgrowth or the entire grain is replaced by powdery black mass of smut spores. b. Occurrence/distribution The disease is known to occur in many countries worldwide (Fig. 60). c. Disease history In 1986, the causal fungus of this disease was originally called Tilletia horrida.
It is most prevalent in temperate subtropical environments and also in rice grown in upland conditions. c. Disease history Records of this disease can be traced back to as early as 1637 in China. It was reported in 1704 in Japan, in 1828 in Italy, and in 1907 in South Carolina, USA. In India, it was first recorded in 1913. Its causal fungus, Pyricularia oryzae, was named in 1891 in Italy. It was recently renamed P. grisea but P. oryzae has widespread usage. d. Importance in crop production Blast is generally considered as the principal disease of rice because of its wide distribution and destruction in causing crop failure and epidemics.
C. Disease history Records of this disease can be traced back to as early as 1637 in China. It was reported in 1704 in Japan, in 1828 in Italy, and in 1907 in South Carolina, USA. In India, it was first recorded in 1913. Its causal fungus, Pyricularia oryzae, was named in 1891 in Italy. It was recently renamed P. grisea but P. oryzae has widespread usage. d. Importance in crop production Blast is generally considered as the principal disease of rice because of its wide distribution and destruction in causing crop failure and epidemics.