In this Issue:

New IPM Publications for 2006!

VEGETABLE NEWS

Vegetable Insect Pest Update - Southern Minnesota

STRAWBERRY NEWS

Strawberry Weekly Pest Sampling Data

Tarnished Plant Bug Damage, Frost Damage, or Boron Deficiency?

APPLE NEWS

Apple Maggot – Adult Emergence Data for Five Minnesota Orchards in 2004 & 2005*

Apple Weekly Trap Counts

Apple Scab Infections

Apple Trap Note – What's that Insect?

Insect, Pest Fact Sheets

Apple Maggot – Adult Emergence Data for Five Minnesota Orchards in 2004 & 2005*

Apple maggot (AM) overwinter as pupae in the soil. In Minnesota , adult flies emerge from the soil from late June to early July. When freshly emerged, AM flies are sexually immature and feed mainly on aphid honeydew. It takes about a week or more for newly emerged flies to become sexually mature, at which time they will congregate on the apple fruit and mate. After mating, female AM lay eggs singly under the skin of an apple fruit. The eggs hatch into larvae in 2 to 10 days, depending on temperature. AM larvae feed with in the apple and pass through three instars (stages). Larval development within the fruit usually continues for 20 to 30 days. Infested fruits usually fall to the ground at this stage, allowing the maggots to leave the fruit, burrow into the soil (1” to 6”), and molt to a fourth instar. This fourth instar quickly molts again into the pupal stage. AM pupae are found enclosed within puparia made by the larvae.

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Co-Editors: Bill Hutchison (hutch002@umn.edu), Department of Entomology, University of Minnesota, Jeanne Ciborowski, Minnesota Department of Agriculture, Ag. Resources Management and Development Division, and Suzanne Wold-Burkness (woldx018@umn.edu), Department of Entomology, University of Minnesota

The Newsletter is published weekly from May through August, cooperatively, by the Minnesota Department of Agriculture (MDA) and the University of Minnesota (U of MN). Reports are posted on the U of MN and MDA web sites on Fridays. If you have suggestions and/or comments, please send your contributions by 4 p.m., Wednesday to Jean Ciborowski, 651-201-6217, jeanne.ciborowski@state.mn.us, MDA, 625 Robert St. North, St. Paul, MN 55155-2538. You can access the Newsletter at the U of MN web site in htm format at: www.vegedge.umn.edu/MNFruit&VegNews/mnindex.htm and at the MDA web site in pdf format at: http://www.mda.state.mn.us/ipm/ipmnews/

Partial funding for this publication is provided through partnership agreements with the Minnesota Fruit and Vegetable Growers Association (MFVGA) and the United States Department of Agriculture – Risk Management Agency (RMA). These institutions are equal opportunity providers.

DISCLAIMER

Reference to products in this publication is not intended to be an endorsement to the exclusion of others which may have similar uses. Any person using products listed in this publication assumes full responsibility for their use in accordance with current manufacturer directions.

The University, including the Minnesota Extension Service, is an equal opportunity educator and employer. ©1999-2006 Minnesota Extension Service, University of Minnesota. All rights reserved. Contact copyright@extension.umn.edu for information on reproduction or use of this material.