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Fruit & Vegetable Weekly Crop Update

Timely vegetable crop info for local producers.
squash bug

weekly update 7-13-2012

Posted by Kyle Cecil -

  1. 4 inch soil temp: 79.3F
  2. Growing Degree Days: 1844.0 GDD Average = 1339.0 GDD
  3. Crop critical water use timing. Nearly all vegetable crops are sensitive to drought during two periods: during harvest and two to three weeks before harvest. Cucumbers, melons, pumpkins and squashes, peppers, sweet corn, and tomatoes are most sensitive to drought stress at flowering and as fruits and seeds develop. In sweetpotatoes, potatoes, carrots, and onions, yield depends on the production and translocation of carbohydrates from the leaf to the root or bulb. The most sensitive stage of growth generally occurs as these storage organs enlarge.
  4. Drought and diseases. One might assume that disease issues could lesson with dry conditions. This is not necessarily so. For example, downy mildew favors warm WET conditions while Powdery mildew favors warm relatively DRY conditions. If in doubt on a disease issue on your farm, call us and let us help figure it out.
  5. Squash bug numbers are significant. Look on the underside of the leaves for the egg masses (see picture above). We addressed control measures in last week's update http://web.extension.illinois.edu/hkmw/eb264/


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