Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Evaluation of herbicides against dodder (Cuscuta reflexa) infesting the hedges of bougainvillea (Bougainvillaea purpurea) and cleridendron (Cleridendron splendena).

Abstract

Field experiments were conducted during 1998-2000, in Hisar and Punchkula, Haryana, India, to evaluate the efficacy of 5 different herbicides against dodder (Cuscuta reflexa). Results showed that glyphosate at 0.5% solution (v/v), MON 8793 at 2.7 kg/ha and MON 8794 at 1.8 kg/ha provided 85-95% control of C. reflexa on the hedges of bougainvillea (Bougainvillea purpurea) and clerodendron (Clerodendron splendena [Clerodendrum splendens]) up to 90 days after treatment at both locations. However, higher doses of these 3 herbicides caused toxicity to both bougainvillea (10-30%) and clerodendron (50-70%) without any additional efficacy against C. reflexa. At lower doses, the control of C. reflexa was not satisfactory. Glufosinate and 2,4-DE [2,4-D] as well as manual removal proved ineffective against this parasitic weed.