Peter Tirosh


Peter was our founder and driving spirit, a visionary with a heart as deep and wide as the agricultural fields he devoted his life to. An Israeli pioneer in biological food protection solutions, Peter spearheaded the development and commercialization of botanical-based formulations as a viable alternative to conventional chemical spraying.

Much of Peter’s foray into biologics can be seen as an extension of his love for people. He was a man who cared deeply about the farmers and agrarian communities he came in contact with across the globe. He was genuinely interested in their lives and was famous for the personal bond he formed with them. So naturally, he cared about the land they lived on and the toll that chemical spraying took on them and their families – and by extension, on us all.

His illustrious 45-year career in the global crop protection industry began with a position in Central America as part of a UN Food and Agriculture Organization (FAO) project. He went on to garner twenty-three years of field experience with generic agrochemicals at Makhteshim-Agan (Adama).

In 1994, he set off on his own, forming Stockton (currently STK), a trading company for generics, which was predicated on the deep connections and relationships he had cultivated over decades in Central and South America.

Through his close relationships with farmers and by observing their needs up close in the fields and plantations of the region, Peter began to see the gaps that the industry was facing. He understood that the complexities of meeting regulatory demands for safer and healthier produce required a more sustainable approach to growing food. This realization fostered in him a growing interest in the emerging biological biopesticides market.

Seizing an opportunity, STK, led by Peter and his son Ziv, acquired an Israeli start­up in 2004, focused on the development of botanical-based solutions, which became the cornerstone of the company’s in-house research and development efforts.

The transformation had begun. STK has since gone on to become one of just a handful of bio-ag technology companies with a pure-play focus on developing and manufacturing botanical-based food protection solutions. Peter’s love of people, his passionate spirit and professional ethics are his enduring legacy. His spirit continues to inspire our efforts at STK to develop products that help ensure a safer, healthier and more abundant food supply.

Guy Elitzur, STK’s CEO, eulogized him when Peter passed away: “He was forever young – it was fun to watch him walking down the hall, curious about new development ideas, passionate for action, with an insatiable thirst for learning. He wanted to understand more, to hear and to know more. He was young at heart and didn’t allow his age to interfere”.

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STK Hosts Banana Grower Delegation from Brazil

March 2018 STK bio-ag technologies, a leading company in the development and marketing of botanical-based solutions, hosted today a technical visit  of brazilian banana growers to learn more about the positive effects of  botanicals on banana and its added benefits for crop protection. The visit began at STK HQs, followed by a 5 day technical tour throughout Israel to learn from various farms, banana specialists and listen to professional lectures in the industry. The VIP delegation of 15 visitors composed by producers, consultants and managers of associations covering all regions of Banana production in Brazil, visited as part of study tour the premises of STK HQs in Israel. The growers and consultants who will take part in this trip, represent more than 15,000 hectares of banana and the associations and cooperatives represent more than 80,000 hectares. The vist included and extensive tour of the the STK lab, during which the delegation was exposed to the company’s scientific and technological approach to researching and developing botanical-based solutions, as well as the exacting quality control practices employed in producing consistently effective commercial-grade formulations. Considerable discussion focused on Timorex Gold®, STK’s flagship solution which is currently sold and used on various crops throughout Brazil. The environmentally-friendly, botanical-based food protection fungicide increases productivity and efficiency in crops, while reducing chemical load residues on the produce. The delegation was informed about the benefits of Timorex Gold® for banana growers, including short PHI, zero residue, and the enlarging and promotion of the leaf surface. Timorex Gold®is certified worldwide by leading organic associations, including IBD Brazil, ECOCERT, BCS and others