Dw. Cudney et al., EFFECTS OF THIAZOPYR AND TRIFLURALIN ON DODDER (CUSCUTA-INDECORA) IN ALFALFA (MEDICAGO-SATIVA), Weed technology, 7(4), 1993, pp. 860-864
Trifluralin selectively controls dodder in alfalfa. However, its soil
activity dissipates allowing some late season dodder germination. Thia
zopyr applied PRE was also found to control dodder selectively in alfa
lfa. Thiazopyr was more effective when applied in February than in Nov
ember. Thiazopyr did not control dodder longer into the season than tr
ifluralin in field tests, however it was more effective in greenhouse
experiments. The effect of thiazopyr on dodder shoot tips was similar
to that of trifluralin, in that both herbicides produced bulbous cells
with thickened, globular nuclei, typical of cells treated with herbic
ides affecting microtubules.