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Jefferson County |
Agriculture
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Natural Resources
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JeffersonTobacco under cool, cloudy, wet weather.
| YELLOW BUD and YELLOW LEAF . Many recognize and appreciate that cold injury can occur in transplants. But, we also need to appreciate that the cool weather conditions prevalent over Kentucky for the last month can trigger physiological injury (cold /chill injury) to plants growing in the field. Tobacco is native to subtropical areas that have warmer climates and it is sensitive to cold, wet conditions especially during periods of changing air temperatures when the soil is still cool. Under such growing conditions there can be significant disruption of the normal hormonal control associated | with growth and development. When the leaf is urged to grow, but the cold roots cannot maintain their normal production of hormones (some of which is sent to the top), expect to see damage to the leaf development, bud development, and even floral development/timing. Last week tobacco growers, agricultural agents, and chemical company representatives from most regions of the state and neighboring states were contacting us about yellowing of the buds and leaves, especially in plants that had been in the field for two weeks or more. This article continues in page 3. | PLANT
& SOIL SCIENCES FIELD DAY
The Agronomy Department will sponsor a Plant and Soil Science Field Day at Spindletop Farm in Lexington on Thursday, June 12. The Field Day will begin at 2:00 p.m. with several demonstrations including: Bale Wrapping, No-till Tobacco, Precision Ag. Equipment, and Water Runoff Management. Walking tours will be offered featuring crops, weeds, and turf. Field tours will be from 4:30-8:30 and will feature Tobacco, Forages and Corn. Two Forage tours will be offered: Tour 1: Pasture Management and MRLS Tour 2: New Developments in Hay & Silage
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County
June 2003
