Biological Seed Treatments for Vegetables

Whether you are practicing organic or conventional cultivation methods, biological seed treatments are playing an increased role in the field which includes .  In fact, recent studies note that more conventional growers are opting to incorporate softer biological chemistries for crop protection. Our certified organic biological seed treatments offer a broad spectrum of controls that help growers overcome diseases and crop protection during the early growth stage. Some countries require that seeds be treated with biologicals to prevent the spread of pathogens from one region to another.

Providing Biological Seed Treatments Since 2009

In 2009, Germains was the first to introduce T-22™ seed treatment to North America and Mexico.  T-22 has become one of the most popular organic biological seed treatments that meets Mexico’s Agriculture Ministry (SARGAPA) phytosanitary requirements for exporting seeds to Mexico. Germains continues to work in close collaboration with SAGARPA and AMSAC (Asociación Mexicana de Semilleros) to ensure the seeds we process continue to meet Mexico’s phytosanitary requirements and prevent export delays.  By 2012, Actinovate and Mycostop were added to our organic portfolio.

Biological Seed Treatments

Biological Seed Treatments for You to Choose From

The following is a list of the certified organic biological seed treatments that we currently offer:


Trichoderma harzianum Rifai strain T-22

T-22 HC is a preventative biological fungicide for control of plant diseases. The active ingredient is a microbe, Trichoderma harzianum Rifai Strain T-22, which when applied to seeds, grows onto plant roots as they develop and provides protection against plant root pathogens such as Pythium, Rhizoctonia, Fusarium, Cylindrocladium, and Thielaviopsis. T-22 HC Biological Fungicide can be used alone or in conjunction with certain chemical fungicides. If applied with conventional fungicides the product is no longer organic certified. T-22 is a registered trademark of Bioworks®, Inc.


Streptomyces lydicus WYEC 108

For preventative suppression or biological fungus control, Actinovate is a popular option for combating soil-borne plant diseases such as Pythium, Rhizoctonia, Phytophthora, and Fusarium. Actinovate® is a biological fungicide is registered by Natural Industries, Monsanto BioAg™.


Mycelium and spores of Streptomyces strain K61 actinobacterium,

Controls damping-off, wilt and root diseases caused by Fusarium, Phytophthora, Alternaria and Pythium fungi.  Also, Mycostop contains Streptomyces ray bacteria isolated from Finnish Sphagnum peat that suppresses diseases caused by Rhizoctonia sp. and Botrytis sp. The product promotes growth and has been noted to increase yields even in healthy crops. Mycostop® is registered by Verdera OY.

Click Here to download the manufacture labels and brochures.

Biological Seed Treatments by Species

Germains organic biological seed treatments are available for a wide variety of vegetable crops.  The following is a list of the each of the products and the species that are approved for treatment.  However, if you do not see the crop you wish to treat, please feel free to contact us!

Biological Seed Treatments

Excellent Quality Standards

Each of the biological seed treatments we offer has a specific requirement for seed application.  Germains has worked extensively to provide the right amount of Colony Forming Units or CFU’s per seed as directed by the manufacturers. Post treatment, seed lots are randomly tested for CFU counts to ensure proper spore or mycelium loading.

Biologicals treated with Germains proprietary coating applications have a shelf life of 6- months from the application date as long as the coated seed is stored at or below 15°C / 40% RH in a sealed container. Product efficacy claims are all based on the manufacturers EPA approval labels.  Each of the products listed above is OMRI approved and our applications are Certified Organic by ASCO.

Contact Us for More Information about Our Biological Seed Treatments

Germains offers a variety of organic seed pellets, priming and seed disinfection that you may consider pairing with a biological seed treatment that is suitable for your environment.  For more information and or to trial our products, please feel free to contact us today!