Control and Ecology of Weeds in Continuous Corn Grown Without Tillage
- 1 September 1972
- journal article
- research article
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 20 (5), 453-457
- https://doi.org/10.1017/s0043174500036122
Abstract
Corn (Zea mays L.) was grown continuously without tillage (no-tillage) and with conventional tillage for 7 years to evaluate several herbicides for use in both crop culture systems. The only consistently satisfactory herbicide combinations for the no-tillage corn were 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) and 1,1′-dimethyl-4,4′bipyridinium ion (paraquat) or 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine), simazine, and paraquat. Annual weed population shifted rapidly with different herbicide systems; fall panicum (Panicum dichotomiflorum Michx.) was the major annual weed where triazines were used as the residual herbicide. After several years of corn grown with no-tillage, hempdogbane (Apocynum cannabinum L.) became a significant problem in some plots. Corn yields with no-tillage were equal to yields in tilled areas provided weed control was satisfactory.Keywords
This publication has 3 references indexed in Scilit:
- The No‐Tillage System for Corn ( Zea mays L.) 1Agronomy Journal, 1968
- Mode of Response of Weed‐Free Corn to Post‐Planting Cultivation1Agronomy Journal, 1967
- Herbicide Systems for No‐Tillage Corn (Zea mays L.) Following Sod1Agronomy Journal, 1966