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Fruit & Vegetable Weekly Crop Update

Timely vegetable crop info for local producers.
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weekly fruit and vegetable crop update 6-17-2013

Posted by Kyle Cecil -

1.4 inch soil temp: 70.2 F

2.Growing Degree Days(GDD) since April 1: 2013 = 799.0 GDD Average** = 741.0 GDD

3.Cutwormsare widespread this year. Species, such as glassy cutworms, remain in the soil for extended periods and feed upon roots and underground parts of the plant. Prevention is the key here. Once the larvae are doing their thing, control measures are not very effective. I have had reports of damage to turnips and radishes from across the area. See picture.

Cutworm damage on Hakurei turnip.

4.Chris Enroth, Horticulture Educator out of Macomb, has been catching codling moths in his network of traps locally. According to Dr. Weinzierl, in Urbana, degree-day accumulations suggest that that about 60 percent of first-generation moths have emerged and that first-generation egg hatch is about 10 percent complete. See the 2013 Midwest Tree Fruit Spray Guide for listings of effective insecticides for codling moth control in orchard crops. See picture #2 above from Chris.

5.High tunnel vegetable insects continued.The next on our list of common pests in tunnels are aphids. Aphids may be green, yellow, brown, red, or black. Aphids have many generations a year and cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky exudate known as honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, which further distorts growth. See this factsheet for more detailed information.

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