Diseases and disease management in rice ratoon crops
1988
Mew, T.W. | Fabellar, N.G. (International Rice Research Inst., Los Banos, Laguna (Philippines))
If rice cultivars possessed resistance to certain rice diseases, the level or degree of resistance also showed in the ratoon crop. If the main crop has systemic disease infection, the stubble was unlikely to produce any ratoon tillers; if the infection was late, with diseases such as tungro, ratoon tillers may develop but subsequently succumb to the disease. Yellow dwarf, a disease caused by a mycoplasma-like organism, was often observed in ratoon crops, probably because of its long latency in rice plants. Diseases such as sheath blights and stem rot were observed not only on the main crop, but also on the ratoon crop. Their effect on ratooning was erratic. It appears to be more effective for ratoon production to manage diseases like sheath blight and stem rot in the main crop rather than in the ratoon crop. Individual ratoon tillers may be prone to lodge or die as a result of diseases such as sheath blight and stem rot in the main crop.
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