Spring insecticide treatments control adelgids on Douglas fir
Insecticide applications made to Douglas fir Christmas trees vary in their ability to suppress Cooley spruce gall adeigid, a sucking insect that causes needle distortion and discoloration. A field experiment in Napa County showed that organophosphate systemics are ineffective at controlling adelgids...
| Published in: | California Agriculture |
|---|---|
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
University of California Agriculture and Natural Resources
1996-09-01
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| Online Access: | https://doi.org/10.3733/ca.v050n05p34 |