Herbicide Resistant Weeds

Absorption, translocation, and metabolism of foliar-applied imazaquin in soybeans (Glycine max), peanuts (Arachis hypogaea), and associated weeds.

Wilcut, J. W., G. R. Wehtje, M. G. Patterson, and T. A. Cole. 1988. Absorption, translocation, and metabolism of foliar-applied imazaquin in soybeans (Glycine max), peanuts (Arachis hypogaea), and associated weeds. Weed Science. 36: 5-8.

Absorption of foliar-applied [14C]imazaquin 72 h after treatment was >90% for soyabeans, groundnuts, Xanthium strumarium, Cassia obtusifolia and Desmodium tortuosum. Both symplasmic and apoplasmic translocation of the herbicide was evident. Imazaquin's half-life was 4.4 days in soyabeans, 5.3 days in groundnuts, 9.6 days in D. tortuosum, 12.7 days in C. obtusifolia and 39.8 days in X. strumarium. Tolerance of these species to foliar-applied imazaquin as determined in greenhouse studies with 21-day-old seedlings was as follows: soyabeans = groundnuts > D. tortuosum > C. obtusifolia > X. strumarium. Tolerance was directly correlated to imazaquin half-life within the tissue of each species.