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The active ingredient permethrin tends to treat any bugs that attack birch trees (Betula spp).

Specifically, bugs that commonly attack birch trees include bronze birch borers, Japanese beetles, leafhoppers, scale and spider mites. The timing of the permethrin treatment is important in each case. The following lists the application dates for the above-mentioned pests:

1. Bronze birch borers, mid-May to early, mid- or even late June;

2. Japanese beetles, late June to early July as well as August;

3. Leafhoppers, Spring to early summer, when bugs first are seen and before the stippling of leaf undersides becomes extensive;

4. Scale, crawler stage of particular scale in question;

5. Spider mites, late April to early May or September to October.

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14y ago

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