EFFECT OF NICOSULFURON ON JOHNSONGRASS (SORGHUM-HALEPENSE) CONTROL AND CORN (ZEA-MAYS) PERFORMANCE

被引：9

作者：

GUBBIGA, NG ^{[1
]}

WORSHAM, AD ^{[1
]}

COBLE, HD ^{[1
]}

LEMONS, RW ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV,DEPT CROP SCI,RALEIGH,NC 27695

来源：

WEED TECHNOLOGY | 1995年 / 9卷 / 03期

关键词：

ALLELOPATHY; FOLIAR UPTAKE; LEACHING; POST-DIRECTED; POSTEMERGENCE; ROOT EXUDATION AND TRANSFER; ROOT UPTAKE; SPLIT APPLICATION; SORHA;

D O I：

10.1017/S0890037X00023873

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Field experiments were conducted at two locations in North Carolina during the summer of 1992 to ascertain the reasons for stunted growth of corn noticed occasionally in fields treated POST with nicosulfuron to control dense infestations of johnsongrass. Treatments consisted of nicosulfuron at 35 g ai/ha sprayed POST, either over-top or post-directed only to johnsongrass in a single early application or in sequential applications of 17.5 g/ha. Checks included a hand-weeded, paraquat post-directed to johnsongrass, and non-weeded. Nicosulfuron provided satisfactory control of johnsongrass irrespective of whether applied once or sequentially. Corn yield in nicosulfuron-treated plots was as much as three times greater than in non-treated plots depending on hybrid and location. In the absence of johnsongrass interference, nicosulfuron caused a corn yield reduction of 6 to 9%. However, in the presence of johnsongrass interference, an additional 16 to 26% reduction in yield occurred with a POST application of nicosulfuron. Reductions in corn plant height and dry matter accumulation also were noticed for nicosulfuron treatments compared to post-directed application of paraquat and hand removal of johnsongrass.

引用

页码：574 / 581

页数：8