Patent ID: 7572959

Claim:
A method of controlling cyst nematode population in soybeans, comprising the steps of: planting in one growing season a first blended composition of soybean varieties, wherein said first blended composition comprises a quantity of a first cyst nematode race resistant soybean variety having resistance to a first race spectrum and a quantity of a second soybean variety selected from the group consisting of a cyst nematode race resistant soybean variety having resistance to a second race spectrum and a cyst nematode susceptible soybean variety; harvesting said first blended composition of soybean varieties to yield a soybean crop; planting in another growing season a second blended composition of soybean varieties, wherein said second blended composition comprises a quantity of a first cyst nematode race resistant soybean variety having resistance to a first race spectrum and a quantity of a second soybean variety selected from the group consisting of a cyst nematode race resistant soybean variety having resistance to a second race spectrum and a cyst nematode susceptible soybean variety; harvesting said second blended composition of soybean varieties to yield a soybean crop; rotating the growing of a first blended composition of resistant or resistant and susceptible varieties with the growing of a second blended composition of resistant or resistant and susceptible varieties over at least two growing seasons to control soybean cyst nematode population in soybean, wherein the first blended composition and the second blended composition are different.