- 行业: Agriculture
- Number of terms: 29629
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A viral disease transmitted by green leafhoppers (Nephotettix sp.). The first symptom of yellow dwarf is general chlorosis, especially on the newly emerged and young leaves. The color varies from yellowish to green. As the disease progresses, the infected plants become severely stunted, tillering increases markedly, and leaves become soft and droopy. The infected plants produce either no panicles or a few small panicles, which bear mostly unfilled spikelets.
Industry:Agriculture
The supporting and water-conducting tissue of vascular plants; plant tissue consisting primarily of tracheids and vessels; woody tissue.
Industry:Agriculture
A condition wherein seedlings have pale yellow leaves and perish shortly after germination.
Industry:Agriculture
A comprehensive collection of samples from different geographic areas of the world which is documented and stored. These are kept in storage as a genetic stock, and available to all for breeding purposes or reestablishment of a variety in a given location. Only segments of the world collection are of immediate practical value and thus find their way into the working collection.
Industry:Agriculture
A sizable number of evaluated accessions that is stored, documented, and frequently used in breeding research.
Industry:Agriculture
A planting of trees, shrubs, or other vegetation, usually perpendicular or nearly so, to the principal wind direction, to protect soil, crops, homesteads, roads, etc., against the effects of winds, such as wind erosion and the drifting of soil and snow.
Industry:Agriculture
Reached when the soil cannot supply enough water to balance the plant's losses by transpiration.
Industry:Agriculture
The percentage of water necessary for a plant that has begun to wilt to recover, if that water is supplied.
Industry:Agriculture
