coming into ear

From metaphase of the 1990s to beginning of this century, the symptom "small grains and erect panicles"(SGP) in rice was widespread in most Oryza sativa cultivars in Jiangsu Province, which generally caused yield loss ranging from 10% to 30%, even as high as 50% in heavily infected regions.

从上个世纪90年代中期到本世纪初，江苏水稻生产上连续大面积发生严重的“小穗头”现象，直接造成稻谷产量大幅下降。

Recent years,small grains and erect panicle occurred in many rice varieties on a large scale in Jiangsu Province.

近年来,江苏省大面积、多品种水稻普遍发生“小穗头”症状。