In the battle against orchard pests, organic growers face a critical challenge: controlling codling moth populations while maintaining organic certification standards. According to the International Atomic Energy Agency, Sterile Insect Technique (SIT) offers a proven, pesticide-free approach that has revolutionized organic pest management worldwide.

Washington State: A Leader in Apple Production and Innovation

Washington State remains a pivotal hub for apple production, contributing nearly 70% of the U.S. apple supply and more than 90% of the nation’s organic apples. This dominance is driven by its ideal growing conditions, including nutrient-rich soils, a dry climate, and advanced agricultural techniques. Apples are not only the state’s top agricultural commodity but also a cornerstone of its economy, generating approximately $2 billion annually and supporting over 46,000 full-time jobs. Organic apple production is particularly significant, reflecting growing consumer demand and now accounting for nearly 16% of Washington’s total crop. Growers, however, face mounting challenges with runaway pest pressure alongside of consumer demand for organic produce.

The Growing Challenge of Codling Moth Management

Codling moth presents an escalating threat to apple and pear orchards, driving management costs for organic farms beyond $2,600 per acre. As resistance to codling moth control methods like Cydia pomonella granulovirus (CpGV) virus sprays mount, growers are reporting weekly applications accounting for an annual cost of roughly $1,400 to $2,000 per acre. Beyond granulovirus virus, growers also report reduced performance in emitter-applied pheromone mating disruption. While growers report success with reverting back to hand applying 400 twist ties per acre, this practice increases labor at a time when labor costs for specialty crop growers reached an astonishing 553% higher than the average farm operation across all commodities. These challenges have pushed some organic farmers to reconsider certification, as cost spiral and codling moth management remains elusive.

Understanding SIT: Nature’s Own Defense Mechanism

Unlike Genetically Modified Organisms (GMOs), which are prohibited in organic agriculture, Classical, radiation based SIT offers an environmentally friendly and organic-compatible pest control solution. SIT leverages the natural reproductive cycle of pests, such as the codling moth, by mass-rearing and sterilizing them using radiation. These sterile insects are then released via drones over orchards. When they mate with wild populations, no offspring are produced, leading to a gradual population decline.

The International Atomic Energy Agency (IAEA) confirms SIT’s effectiveness as a species-specific and non-invasive method that avoids introducing non-native organisms and reduces reliance on chemical pesticides. Studies demonstrate its success in significantly suppressing codling moth populations when integrated into area-wide pest management programs. While outcomes can vary based on environmental factors and release protocols, SIT consistently proves to be a sustainable and effective pest control strategy.

Growing Success in Washington

Washington State has begun embracing SIT, particularly for organic apple orchards. In contrast to British Columbia’s government-subsidized initiative, Washington growers adopt SIT voluntarily—much like any other commercially available pest control method.

Pioneering this approach, M3 Agriculture Technologies started drone releases of sterile moths in 2018. M3’s coverage has grown steadily, from 56 acres in 2018 to a targeted 5,500 acres in 2025. By integrating SIT with other pest management tactics, Washington’s growers are achieving better codling moth control while minimizing pesticide use.

M3 SIR: A New Era in Codling Moth Control

British Columbia’s success story dates back over 30 years, when the Osoyoos Kootenay Sterile Insect Release (OKSIR) program first introduced area-wide SIT. It achieved a 96% reduction in chemical pesticide usage and suppressed codling moth to levels below economic thresholds. Building on this proven model, M3 Agriculture Technologies is now bringing similar success to Washington.

By focusing on residue-free fruit production, SIT aligns with growing consumer demand for healthier, sustainably produced food. It also offers growers a way to reduce the risk of pesticide resistance—a factor that continues to plague traditional chemical and mating disruption strategies.

Season-long SIT programs cost between $315 and $570 per acre for 20 weekly releases. This upfront investment can lead to long-term savings by reducing the need for supplemental pest control measures. Critically, SIT maintains organic certification compliance, as verified by organizations like the Organic Materials Review Institute (OMRI) making it an attractive choice for growers seeking to preserve both their yields and their certification.

Strategies for Effective Implementation

To optimize results, growers should:

• Monitor pest populations before initiating releases
• Coordinate with neighboring orchards to expand coverage
• Record application timing and outcomes
• Integrate SIT with other organic pest control measures

By working collaboratively, growers can significantly reduce codling moth pressure across entire regions rather than in isolated orchards.

The Future of Organic Pest Control

As organic agriculture evolves, SIT continues to gain recognition as a leading solution for persistent pest challenges. Its effectiveness—witnessed by British Columbia growers and documented by numerous independent researchers—makes SIT an invaluable tool for orchardists aiming to protect their crops while meeting consumer demand for certified organic produce.

Sustainable Solutions for Orchardists

For organic apple and pear growers grappling with codling moth infestations, SIT offers a scientifically proven, certification-friendly alternative. By incorporating sterile moth releases into an integrated pest management plan, producers can protect their orchards and bolster sustainability efforts.

To learn more about tailoring SIT to your operation, contact M3 Agriculture Technologies for a customized implementation plan. The future of organic pest management is here—harnessing nature’s own mechanisms for long-term success.