| 摘要: |
| 自然发病田中，病级与穗粒数下降率、千粒重下降率均呈显著正相关。田间土壤接种试验表明，同一品种在相同气候条件下，土壤带菌量是小麦根腐病发生和危害程度的关键因素；腊熟期小麦根腐病病情指数与产量损失率显著正相关（r=0.972 5*，n=4）。拌种防治小麦根腐病，防治指标为当地近年主栽品种上的病情指数。 |
| 关键词: 小麦根腐病 产量损失 经济阈值 |
| DOI： |
| 分类号:S512.106.1 |
| 基金项目:青海省科委科技攻关项目(94-2-101) |
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| Study on the losses of wheat yield and the ELT to wheat root rot |
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TONG Shui dong
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| Abstract: |
| Under the natural condition, the disease severity scale has significantly positive correlation to the reduced rate of the ear grains and 1 000 kernels weight.The result of inoculated soil trail showed that damage degree of Bipolaris Sorokinianum (Sacc.)Shoemader on a same variety and climate is mainly influenced by the amount of fungus in soil.The relativity between the disease indes in mature period and the loss is significant positivity (r=0.972 5*,n=4).Seed dressing is used for controlling Wheat BSS,ELT is basied on disease index of varieties at local area in recent years. |
| Key words: Bipolaris sorokinianum (Sacc.) Shoemaker yield loss ELT |
