Leafhoppers
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.
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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
blunt head. |
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 it’s 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.
See
http://vegetablemdonline.ppath.cornell.edu/diagnostickeys/TomLeaf/TomLeafKey.html#Phenoxy
| New England Greenhouse Update now online. University Extension Specialists in New England, in conjunction with USDA's Northeast Sustainable Agriculture Research and Education, contribute information to this new website. Timely updates are provided for commercial growers of greenhouse crops and flowers in Massachusetts, Connecticut and Rhode Island. You can use this additional resource for more information about current observations and recommendations on environmentally safe production practices. |
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GREENHOUSE IPM COORDINATOR (commercial interests and growers) |
LEANNE PUNDT | 860-626-6240 |
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HOME GREENHOUSE
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Information on our site was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.
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