Spinetoram: Next-Generation Insecticide for Specialty Crops

Advancing the Spinosyn Legacy

Spinetoram (Dow AgroSciences) is a second-generation spinosyn insecticide—chemically modified from the natural fermentation product spinosad. Its enhanced molecular structure delivers broader spectrum, improved photostability, and superior translaminar movement, addressing key limitations of its predecessor while retaining the favorable environmental profile that made spinosyns revolutionary.

Comparative Advantages Over Spinosad

Key Target Pests & Crops

• Pome fruit: Codling moth (primary), leafrollers, leafminers — Delegate® WG (25% WG)
• Stone fruit: Oriental fruit moth, peach twig borer, thrips
• Grapes: Grape berry moth, leafrollers, thrips
• Fruiting vegetables: Tomato pinworm, leafminers, thrips — Radiant® SC (120 g/L)
• Leafy vegetables: Diamondback moth, beet armyworm, thrips, leafminers
• Brassicas: Cabbage looper, imported cabbageworm, diamondback moth
• Cotton: Bollworm, budworm, thrips
• Rice: Leaf folder, stem borer

Application Protocols

• Rate range: 50–100 g ai/ha (Delegate); 30–60 g ai/ha (Radiant). Always follow label.
• Timing: Early instar larvae, egg hatch. Scout-based, not calendar.
• Coverage: High volume, fine droplets for translaminar penetration.
• Adjuvants: MSO or COC recommended for waxy foliage.
• Resistance management: Max 2–3 applications/season. Rotate with Group 28 (diamides), Group 6 (avermectins), Group 22 (indoxacarb).

Environmental & Toxicological Profile

• Beneficials: Low toxicity to predatory mites, lady beetles, lacewings, parasitic wasps, bees (when dry). Compatible with IPM.
• Vertebrates: Low acute toxicity (birds, mammals, fish).
• Soil/Water: Rapid degradation (DT50 < 1 day soil, < 1 day water). No leaching. No groundwater risk.
• REI: 4 hours (most crops). PHI: 1–14 days crop-dependent.

Regulatory Milestones

• 2007: NZ registration (pome fruit, Delegate WG)
• 2007: EPA Reduced Risk registration (Delegate WG, Radiant SC)
• 2007–2008: Canada, Mexico, Pakistan, South Africa, Malaysia registrations
• China: Registered for eggplant thrips, cabbage beet armyworm/DBM, rice leaf folder
• Trade names: Delegate, Radiant, Exalt, Ensure (regional)

Market Position

Spinetoram complements—not replaces—spinosad. Combined annual sales projected >$100M. For apple growers especially, it provides the first effective non-OP/neonicotinoid option for codling moth in decades. Its low dose (g ai/ha), short environmental residence, and beneficial compatibility make it a cornerstone of modern residue-management programs for export-oriented fruit production.

Spinetoram exemplifies rational molecular optimization: nature's scaffold, science's precision. For high-value specialty crops where residue profiles and resistance management dictate market access, it's become indispensable.