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发生时期和症状秧田薄膜育秧,于3月下旬播种,4月上旬烂根死苗;湿润育秧,4月上旬播种,下旬至5月上旬烂根死苗,此时芽子刚分上下,秧龄一叶一心,苗高1.5—3厘米,正是离乳期。根部软烂如水烫,叶尖枯黄,进而死亡,多发生在地势低洼处。本田 5月上旬至6月上旬(栽秧后10—15天),返青末期,开始死苗缩苗。栽后缓秧迟慢,根部黑烂叶片桔红,蹲苗不长往回缩,甚至死亡。
Occurrence and symptoms Seedling film seedlings, sowing in late March, early April rotten dead seedlings; wet seedlings, sowing in early April, late May to early May Rotten root dead shoots, this time buds just up and down, a seedling age Ye Yixin, 1.5-3 cm tall, it is the period from the milk. The roots are rotten and rotten, the leaves are yellowish, and then die, mostly in low-lying areas. Honda early May to early June (10-15 days after planting seedlings), returning to the late Qing Dynasty, began to die young seedlings. Slowly transplanted seedlings slow, root black rotten leaves orange, Dunmiaotong retraction, or even death.