Abstract
Glyphosate (Roundup) [N-(phosphonomethyl) glycine] solution was sprayed in solutions of 2% and 4% on nezasa (Pleioblastus distichus Muroi et H. Okamura var. nezasa Muroi) and kudzu vine (Pueraria lobata (Willd.) Ohwi) which were growing in the citrus groves. These perennial weeds were treated overhead with a spray volume of 50 liters/10a on July 17 and August 23, 1978.
Effects of the 2% glyphosate solution on nezasa appeared within 3 weeks and no recurrence of growth was observed until the following spring. The 2% glyphosate solution also gave complete control of the kudzu vine. Effects appeared within 10 days and, again, no recurrence of growth was observed until the following spring. Respiration rate, and activity, total carbohydrates, total sugars and starch of the rhizomes of nezasa sprayed with 2% glyphosate decreased markedly the following spring.
Glyphosate was translocated into the rhizomes of these perennial weeds, and it is supposed that translocated glyphosate will decay the underground and top parts.
