Physical Barriers

Row covers, kaolin clay particle film, diatomaceous earth barriers, and copper tape that prevent insects from reaching plants through physical obstruction rather than chemical action.

Key Products

Kaolin Clay (Surround) Diatomaceous Earth (DE)

Advantages

Zero chemical residue. No resistance. Season-long protection. Compatible with all other methods.

Limitations

Prevention only — does not control existing infestations. Maintenance (reapply after rain). Cosmetic impact (kaolin whitens plants).