Cyst Tech® products are mixtures or blends of seed from two or more soybean varieties.
According to the company, Cyst Tech® level A (CTA) is a blend of seed of both SCN-susceptible and SCN-resistant varieties and Cyst Tech® level B (CTB) is a blend of seed from two or more SCN-resistant soybean varieties.
The United States Patent Application for Cyst Tech® indicates that Cyst Tech® is
- A method of controlling cyst nematode population in soybeans by providing a blended composition of soybean varieties. At least one of the soybean varieties in the blend has resistance to a given race spectrum, while another of the soybean varieties in the blend may have resistance to a differing race spectrum or be a susceptible variety. The blend may include 10 to 90% of the first variety and 90 to 10% of the second variety. The blend may consist of three or more soybean varieties.
- CTA is a blend of both resistant and susceptible soybean varieties. CTB is a blend of resistant varieties for one or more SCN races.
Read the United States Patent 7,241,938 titled Process for controlling cyst nematode population in soybeans, which describes Cyst Tech®.