Controlling volunteer glyphosate-resistant corn

摘要

An experiment was conducted near Prosper, ND, to evaluate control of volunteer glyphosate-resistant corn inglyphosate-resistant soybean applied POST. Glyphosate-resistant corn was spread and tilled into the soilfollowed by the seeding of Asgrow ‘AG0801' soybean on May 29, 2003. POST treatments were applied onJuly 1 at 10:15 am with 78 F air, 75 F soil surface, 60% relative humidity, 5% clouds, 10 to 15 mph SEwind, dry soil surface, moist subsoil, good crop vigor, and no dew present to V2 to V3 soybean. Weedspecies present were: 6 to 8 inch (50 to 75/ft2) yellow foxtail; and 16 to 20 inch (5 to 40/yd2) volunteer corn.Treatments were applied to the center 6.7 feet of the 10 by 40 foot plots with a backpack-type plot sprayerdelivering 8.5 gpa at 40 psi through 8001 flat fan nozzles. The experiment had a randomized completeblock design with three replicates per treatment.