The result showed that the virulent genes for all wheat materials tested were found in pathogen population from Henan, but the virulent frequencies were different remarkably.

结果表明，河南省小麦白粉菌对所有供试小麦材料都存在相应的毒性基因，但毒性基因频率有明显差异。

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Estimates of the number of dead run to the hundreds of millions world-wide and scores of millions in the U.S. If nature fails to deliver an epidemic, it is unfortunately easy for a highly trained terrorist, by genetic manipulation, to create a super-virulent pathogen with a nearly 100% rate of mortality.

WSJ: Our Blindness