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You are here: Home / Archives for Chal Landgren

Pest control for Christmas trees

By Chal Landgren — Posted February 25, 2019

Evaluating new and old insecticides, and beneficial insects, for aphid control By Chal Landgren, Judy Kowalski, David Howell, Paige Kuchy Aphid control on Christmas tree and other conifer plantings can be a yearly headache for growers. This is especially true for growers of grand fir which, for some reason, seems especially “tasty” to aphids. Over […]

Filed Under: Growing Knowledge Tagged With: Digger, Digger magazine, Growing Knowledge, Oregon State University, Pests and Diseases

Beneficials beyond the greenhouse

By Chal Landgren — Posted March 2, 2015

Scientists track the use of predatory insects for aphid control in
Christmas tree farms.

Filed Under: Growing Knowledge Tagged With: Pests and Diseases

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