Duration of viability of bindweed seed under field conditions and experimental results in the control of bindweed seedlings
1949
Timmons, F.L.
An average emergence of 800 field bindweed seedlings per acre was observed in 1941 in a 14-acre field from which the original stand of bindweed had been eradicated in 1921. Scattered emergence of bindweed seedlings occurred in this field in each subsequent year, including 1948, when 48 seedlings per acre were observed. All bindweed seedlings developed from seed that had been in the soil since 1920 or earlier years. Annual observations were begun in 1938 in another field from which the original stand of bindweed had been eradicated in 1937. The average number of bindweed seedlings per square rod were 93, 62, 71, 13, 19, 96, 14, 7, and 13 in the spring of each year, respectively, from 1938 to 1947. An experiment was started in 1938 to compare the effectiveness in controlling bindweed seedlings of nine different crop rotations and cropping methods. Winter wheat and close-drilled sorghum grown every year or in rotation with summer fallow or row sorghum, supplemented by monthly cultivation when the land was not in crop, gave complete or satisfactory control of bindweed seedlings during a 10-year period. Row sorghum grown every year permitted slow reinfestation of the land from seedlings by an intensive method and rapid reinfestation by an ordinary method. Seeding to buffalograss proved entirely inadequate as a method of preventing reinfestation by bindweed seedlings.
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