Submitted to: Washington State Weed Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 8/1/2001
Publication Date: 11/1/2001
Citation: BOYDSTON, R.A. VOLUNTEER POTATO CONTROL IN SWEET CORN AND FIELD CORN. PROCEEDINGS OF THE 51ST WASHINGTON STATE WEED CONFERENCE, P. 41-16. 2001.
Technical Abstract: Potato tubers left in the soil following a commercial potato harvest can survive mild winter temperatures and become a weed in the ensuing crop. Field and sweet corn are common rotation crops that provide the grower with both cultivation and numerous herbicide options for potato control. Three more cultivations are needed to substantially reduce the number of new daughter tubers produced by volunteer potato plants. Combining early seaso cultivation or herbicide use with late season control by crop competition, Colorado potato beetles, hand weeding, and additional cultivation or herbicide use can greatly reduce the number of new tubers produced. Result of several studies on volunteer potato control with herbicides and cultivation are summarized. Atrazine applied PRE followed by dicamba plus 2,4-D amine POST consistently controlled volunteer potatoes in corn. Fluroxypyr application followed by cultivation ten days later reduced the number of potato tubers produced by 86% compared to nontreated, noncultiva potatoes. Three sequential applications of carfentrazone reduced the numb of new tubers 64% compared to nontreated checks.