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IPM Summary Scouting Report

Last Updated: August 26, 2008

IPM Summary Scouting Report

Aphids
Aphid activity seems to be increasing at this time.

- August 26, 2008

Colorado Potato Beetles
Some CPB activity is being noted. We encourage growers not to treat late season beetles unless economic injury is being resulting. Treating beetles in order to reduce the over-winter population only contributes to the buildup of resistance.

- August 26, 2008

Disease Forecasting
All stations are reporting a 5-day spray schedule. Late blight is now being found in a number of fields around the state.

5-day spray schedule.We urge all growers to be carefully scouting for late blight.

As growers prepare for harvest, we strongly ecourage growers to mark and avoid all areas in the field that has been wet.

Growers who have late blight should be carefully monitoring the weather forecasts and should consider killing late blight infected fields prior to the next significant rain event.

White mold is now being found in some fields as well as some minor early blight.

- August 26, 2008

European Corn Borers
Our scouts are finding a few entry holes in some fields. The number of entry holes being found at this time should have minimal or no economic impact.

- August 26, 2008

Flea Beetles
Only trace numbers are being reported. Some red-headed flea beetles are now being found.

Recommended Economic Threshold is as follows: 15 "shot holes" per terminal leaflet.

- August 26, 2008

Potato Leafhoppers
Very sporadic potato leafhopper activity is being noted. Nymphs have been noted at low levels in several fields. We encourage growers to continue to monitor this insect.

Recommended Economic Threshold: 10 nymphs per 100 leaves surveyed

- August 26, 2008

 

Questions or comments? Please visit our parent web site at: http://www.umext.maine.edu
or contact the Potato IPM program at: P.O. Box 727, Presque Isle, ME 04769
Phone: (207)764-3361.

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