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Introduction
Biology
Damage
Cultural
Control
coming soon
Biological
Control
Chemical
Control
References
Terminology
Links
coming soon
Acknowledgements
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Chemical Control
Some factors to consider with
chemical control are
· mode of action,
· residual,
· potential for phytotoxicity,
· selectivity,
· application efficiency,
· re-entry interval, and
· toxicity.
More selective aphidicides may
be indicated for sites using biological control or interested in conserving
natural enemies. Oils and soaps, though they can kill on contact, have
no residual, leaving immigrating natural enemies unharmed. Although homemade
concoctions of oil and soap applications may very well have an effect
on the aphids, the base products are not formulated for plant use and
may cause phytotoxicity. It is also important for applicators at commercial
nurseries to use pesticides legally registered by the EPA and licensed
in their state.
Toxicity and re-entry levels
vary tremendously.
The PNW Insect Management Hanbook
(online) lists the following chemicals for control of woolly ash aphid.
1. acephate
2. azadirachtin
3. bifenthrin
4. cyfluthrin
5. horticultural oil
6. imidacloprid
7. insecticidal soap
8. lambda-cyhalothrin
9. pymetrozine
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