ABSTRACT

Two studies were conducted in 2002 to examine the benefit of site specific variable rate applications of the nematicide Vapam for the management of the reniform nematode (Rotylenchulus reniformis). One test was established in the fall of 2001 after the cotton crop was harvested and a second test established prior to planting in the spring of 2002.Treatments included Vapam applied at the conventional rates of 3.0, 5.0, and 8.0 gallons per acre and a variable rate aplication of 3.0 - 8.0 gallons per acre based on nematode population numbers. The highest cotton yields were recovered from the variable rate applications in each test. In Test 2, two gallons variable application rate of Vapam per acre produced a yield of 1,706 lbs of lint per acre when applied only to site specific locations based on reniform nematode numbers.