Murray State University
Fungicide Trial on Soybeans Using Two Nozzle Types
Institution
Murray State University
Faculty Advisor/ Mentor
David Ferguson; Tony Brannon; Rocky Napier
Abstract
An experiment was conducted to test two strobilurin fungicides on soybeans with two different commonly used nozzle types. Azoxystrobin is currently being used to improve soybean productivity. Pyraclostrobin is experimental, but registration is expected in the near future. These fungicides were tested with both a flat-fan and air-induction nozzle type on separate plots. Garst 4888RR was planted on 25 May 2004 with 30-inch row width and 35 feet long plots. The treatments were applied with a CO2 charged hand boom sprayer applying 15 gallon per acre. The treatments were: a) 0.0979 lbs. a.i. per acre of pyraclostrobin with 0.25% non-ionic surfactant with air-induction nozzle; b) 0.0979 lbs. a.i. per acre of pyraclostrobin with 0.25% non-ionic surfactant with flat-fan nozzle; c) 0.0975 lbs a.i. of azoxystrobin per acre with air-induction nozzle; d) 0.0975 lbs a.i. of azoxystrobin per acre with flat-fan nozzle; and e) as a unsprayed control treatment. These treatments were applied at the R3 stage. The plots were harvested 7 – 8 October 2004. The yields were calculated for the different treatments and statistical analysis will be conducted on the results.
Fungicide Trial on Soybeans Using Two Nozzle Types
An experiment was conducted to test two strobilurin fungicides on soybeans with two different commonly used nozzle types. Azoxystrobin is currently being used to improve soybean productivity. Pyraclostrobin is experimental, but registration is expected in the near future. These fungicides were tested with both a flat-fan and air-induction nozzle type on separate plots. Garst 4888RR was planted on 25 May 2004 with 30-inch row width and 35 feet long plots. The treatments were applied with a CO2 charged hand boom sprayer applying 15 gallon per acre. The treatments were: a) 0.0979 lbs. a.i. per acre of pyraclostrobin with 0.25% non-ionic surfactant with air-induction nozzle; b) 0.0979 lbs. a.i. per acre of pyraclostrobin with 0.25% non-ionic surfactant with flat-fan nozzle; c) 0.0975 lbs a.i. of azoxystrobin per acre with air-induction nozzle; d) 0.0975 lbs a.i. of azoxystrobin per acre with flat-fan nozzle; and e) as a unsprayed control treatment. These treatments were applied at the R3 stage. The plots were harvested 7 – 8 October 2004. The yields were calculated for the different treatments and statistical analysis will be conducted on the results.