Budworms In Late Season

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Allan Heller 22 Sep 2026

Caterpillars inside outdoor sativa colas cause rot from within during the long autumn finish.

Budworms, the caterpillars of small moths that lay eggs directly into flowering colas, are a serious outdoor threat for sativa lines that are still ripening in September and October. The larvae eat from the inside and leave frass that quickly turns into botrytis, so a cola can look fine outside and be ruined within. The outdoor pest calendar on https://hazesativaseeds.com times BT bacteria sprays around the local moth flights and stops them before harvest so no residue remains. Inspecting colas every few days for brown spots and webbing is the only other defence.