THE CRITICAL PERIOD OF JOHNSONGRASS (SORGHUM-HALEPENSE) CONTROL IN-FIELD CORN (ZEA-MAYS)

Authors
GHOSHEH HZ HOLSHOUSER DL CHANDLER JM
Citation
Hz. Ghosheh et al., THE CRITICAL PERIOD OF JOHNSONGRASS (SORGHUM-HALEPENSE) CONTROL IN-FIELD CORN (ZEA-MAYS), Weed science, 44(4), 1996, pp. 944-947
Citations number
10
Categorie Soggetti
Plant Sciences",Agriculture
Journal title
Weed science → ACNP
ISSN journal
00431745
Volume
44
Issue
4
Year of publication
1996
Pages
944 - 947
Database
ISI
SICI code
0043-1745(1996)44:4<944:TCPOJ(>2.0.ZU;2-6
Abstract
Experiments were conducted from 1989 to 1991 to determine the critical period of johnsongrass control in field corn, Maximum weed-infested a nd weed-free periods of 0 to 20 wk after corn emergence were maintaine d by either hand weeding or nicosulfuron application, Interference dur ation effects on corn grain yield were not affected by johnsongrass co ntrol methods. The critical period for johnsongrass control was determ ined to be between 3 and 6.5 wk after corn emergence to avoid losses a bove 5% of yield produced by full-season weed-free corn.