SILVERLEAF NIGHTSHADE (SOLANUM-ELAEAGNIFOLIUM) CONTROL WITH FOLIAR HERBICIDES

Four experiments (three in Macedonia, Greece and one in Holtville, CA) were conducted in 1988 and 1989 to evaluate foliar applications of pi cloram, glyphosate alone and with adjuvant, and triclopyr for the cont rol of established silverleaf nightshade. Silverleaf nightshade contro l was determined by comparing stem population at the time of herbicide application to stem population 6 to 11 mo after application. Picloram , averaged over rate and location, controlled silverleaf nightshade co nsistently, restricting regrowth to less than 5%. Silverleaf nightshad e control with glyphosate alone or with adjuvant varied with location, regrowth ranged from 0 to 69%. Regrowth of silverleaf nightshade trea ted with triclopyr approached that of the untreated control.