| 摘要: |
| 玉米青枯病严重影响当年和翌年产量。病株后期发生茎腐甚至倒伏。感病玉米当年的千粒重和株粒重分别降低20%和25%左右,穗长、结实长和行粒数降低5-10%,早熟种、矮秆种和发病早、发病重的受影响更大。病株玉米种子的发芽势、发芽率和幼苗生活力下降,后代千粒重和株粒重等也明显降低(5—25%)。病株种子和健株种子的粗蛋白含量无显著差异。 |
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| A Stydy of the Damages Caused by "Green Leaf Blight" in Corn |
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| Abstract: |
| Green Leaf Dlight has a very serious effect upon the grain yield of the sick plants and their next generation.Stalk rot and stalk breakage or lodging often occur on the affected plants during the late period of their development.Seed weight per thousand and grain weight per ear were reduced by some 20％ and 25％ respectively.And ear length of cob bearing kernel and kernels per ear were decreased by 5-10％.Early maturing variety,dwarf variety and early and severe infected plants were much seriously affected.The seeds collected from the sick plants had poor germ potency,lower germ ratio and weak seedling vigor.Seed weight per thousand and grain weight per plant of their descendent plants were also remarkably reduced (5-25％).No evidence has been found showing significant difference in rough protein contents of seeds between the health and sick plants. |
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