Field Notes: a practical look at Thimethoxam 12.5% + Pymetrozine 12.5% WP

If you’ve walked a late-season rice field watching planthoppers stripe the stems, you’ll know why growers keep a mixed formulation like this on speed dial. This wettable powder (WP) pairs Thimethoxam’s systemic knockdown (IRAC 4A) with Pymetrozine’s selective feeding blockade (IRAC 9B). On paper it’s tidy; in real paddies and vegetable tunnels, it’s the kind of “belt-and-suspenders” approach that buys you time against resistance and keeps sap‑feeders off balance.

What’s inside, and why it matters

Formulation: Manufacturer Supply Insecticide Thimethoxam 12.5% + Pymetrozine 12.5% WP. From the plant in Shijiazhuang, Hebei, this blend targets aphids, planthoppers, leafhoppers, and whiteflies on rice, cotton, vegetables, tea, and ornamentals. The two actives complement each other: fast systemic uptake plus a feeding stop signal—handy in hotspots where single‑mode actives are fading, to be honest.

Industry pulse

Global neonics face tighter scrutiny in some regions, yet demand persists across Asia, Africa, and parts of LATAM for economical, resistance‑conscious mixes. The quiet trend: cleaner WPs—lower dust, better suspensibility—because nobody wants clogged nozzles or residue on leaves. Many distributors also ask for private‑label packs and adjustable wetting systems. Actually, that’s become the norm.

Product specifications (typical)

Process flow and QC (how it’s built)

• Materials: tech‑grade Thimethoxam (≈95–98% t.a.i.), tech Pymetrozine (≈97%), dispersants, wetting agents, anti‑caking silica.
• Methods: premix → jet milling → binder addition → homogenization → dust control → sieving → WP conditioning.
• Testing: CIPAC MT 15 (wet sieve residue), MT 47 (suspensibility), MT 53 (wetting), MT 46 (dispersibility), pH, a.i. assay (HPLC).
• Standards & docs: FAO/WHO guideline specs (where applicable), typical plant certifications ISO 9001/14001; ISTA‑style pack drop checks.
• Service life: 24 months; re‑test for suspensibility after long storage or high humidity.
• Industries: row crops (rice, cotton), horticulture (tomato, cucumber, brassicas), tea & ornamentals.

Application scenarios and tips

• Rates: 150–300 g/ha WP; begin at lower end for seedlings or low pressure. Always follow your local label.
• Timing: early infestation or first nymph waves; rotate MOAs to manage resistance.
• Tank mixes: generally compatible with most fungicides; jar test first. Avoid strong alkaline water.
• PHI: commonly 7–14 days depending on crop; check national registrations.

Field performance (snapshots)

- Rice (South China, midsummer): brown planthopper suppression ≈ 85% at 7 DAT; follow‑up at 14 DAT held pressure down without phytotoxic notes.
- Greenhouse cucumber (domestic, spring): cotton aphid counts dropped ≈ 92% by day 7; growers liked the “clean mix—no nozzle grits.”

Customer voice: “It actually wets fast, and we didn’t see residue rings in the tank. That’s rare for some WPs.”

Vendor landscape (quick compare)

Customization checklist

• Private label artwork, multi‑language inserts.
• Particle size tuning for nozzle sensitivity.
• Surfactant package choices (hard water vs soft).
• Regulatory kit: COA, MSDS, stability data, photo set.

Origin: No.1810 Tower B, Jinyuan Building, 152 Huai’an Road, Yuhua District, Shijiazhuang City, Hebei Province, China.

Citations

1. FAO/WHO JMPS. Specifications for Thiamethoxam (neonicotinoid) active ingredient. https://www.fao.org/agriculture/crops/thematic-sitemap/theme/pests/jmps/en/
2. FAO/WHO JMPS. Specifications for Pymetrozine. https://www.fao.org/agriculture/crops/thematic-sitemap/theme/pests/jmps/en/
3. CIPAC Handbook. MT 15, MT 47, MT 53 methods for pesticide formulations. https://www.cipac.org/
4. IRAC Mode of Action Classification: Group 4A (neonicotinoids), Group 9B (pymetrozine). https://irac-online.org/mode-of-action/