For mealybug, fish oil rosin soap at 25 g per litre is listed as a spray option.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Marigold (precision) – Plant protection, p. 258
Region
Tamil Nadu
Last updated
2026-11-04
Chemical pesticides: ask before you spray
The source lists chemical sprays for cutworms and Helicoverpa, mealybug, bud borer, thrips and red spider mite. Many are hazardous, and some may be restricted. Choose a product only with your local Agriculture Officer.
Follow the instructions on the product label. Consult your local Agriculture Officer before use.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Marigold (precision) – Plant protection, p. 258
