Weather conditions seem to be favorable for leafhoppers. They have been observed in perennial nurseries and among vegetable growers (beans and potatoes). The potato leafhopper is especially damaging. Potato leafhopper adults are approximately 1/8 inch long, and light green with 6 white spots just behind their head. This leafhopper does not overwinter in New England. It migrates into New England in late April or early May from the south.
photo: Leanne Pundt, University of Connecticut
Adult potato leafhoppers are yellowish- green, wedge-shaped
insects and may be recognized by the six white spots on the
Look on the underside of leaves along the leaf vein for the young nymphs on Alcea, Astilbe and Dahlia. The potato leafhopper injects a toxin as it feeds so leaves may develop a v-shaped brown, edge burn at the tip known as "hopperburn". This injury may be confused with leaf scorch especially on drought-sensitive Astilbe. Plants may also be stunted with distorted new growth.
Systemic insecticides may be applied to prevent feeding damage when leafhoppers first appear.
Several predators, parasites and fungal pathogens attack the potato leafhopper, but effective biological control is seldom obtained.
Late Blight found in Connecticut
Late Blight was confirmed in New Haven County, CT from a backyard garden on June 17, 2010 at the Plant Diagnostic Office at CAES. For more information see: http://www.ct.gov/caes/cwp/view.asp?Q=442800&A=3756
Once late blight is detected, it is important to pull and destroy infected plants as soon possible. Any infected plants left in the ground have the potential to provide inoculum (the pathogen or itís parts that can cause disease) that can spread to other gardens and farms many miles away.
Protection with Fungicides.
All potato and tomato crops should be protected with fungicides on a regular basis. Products containing chlorothalonil or copper can be suggested for home gardeners.
If you are also a commercial vegetable grower, see the Weekly Vegetable Pest Message under Pest Messages for Growers.
Distorted New Growth on Tomatoes- may be due to a
number of different causes.
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