You do not need to memorize every pest, disease, product, and Latin name before offering PHC. Start by putting the problem into a general bucket. Once you know the bucket, the treatment choices get a whole lot smaller.
The four big treatment buckets
| Category | What it does | What you are looking at |
|---|---|---|
| Insecticides | Manage damaging insects and mites | Bugs, feeding damage, holes, honeydew, frass |
| Fungicides | Prevent or manage fungal diseases | Leaf spots, blights, cankers, wilting, root decline |
| Growth regulators | Slow shoot growth and shift energy | Fast-growing trees, pruning cycles, stress management |
| Health treatments | Support roots, soil, and overall vigor | Compaction, poor soil, transplant stress, drought stress |
For insects, look at how they feed
- Sap-sucking pests: aphids, scale, adelgids, whiteflies, and similar pests. Look for honeydew, sooty mold, stippling, curling, or yellowing.
- Chewing and defoliating pests: caterpillars, beetles, sawflies, and other leaf eaters. Look for holes, ragged edges, skeletonized leaves, or missing foliage.
- Borers and bark beetles: pests feeding under bark or inside wood. Look for exit holes, frass, galleries, pitch, bark injury, or canopy dieback.
For disease, start with where it shows up
- Foliage: spots, blotches, mildew, rust, needle cast, and early leaf drop.
- Limb or trunk: cankers, oozing, cracked bark, dead branches, and vascular wilt symptoms.
- Trunk base or roots: poor vigor, mushrooms, root decay, crown decline, or problems tied to drainage.
Diagnosis does not mean guessing
A category gets you started, but it does not replace confirmation. Host species, site conditions, season, symptom pattern, and sometimes lab testing still matter. PHC Pro walks through those questions so you can narrow the options without pretending every brown leaf is the same brown leaf.
Field note: Product labels and federal, state, and local requirements always come first. Confirm the diagnosis and use only labeled sites, rates, methods, and combinations.