Site specific weed control in winter wheat

被引:49
作者
Gerhards, R [1 ]
Sokefeld, M [1 ]
SchulzeLohne, K [1 ]
Mortensen, DA [1 ]
Kuhbauch, W [1 ]
机构
[1] UNIV NEBRASKA, DEPT AGRON, LINCOLN, NE 68583 USA
关键词
spatial weed distribution; economic weed thresholds; patch sprayer;
D O I
10.1111/j.1439-037X.1997.tb00494.x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Field experiments were conducted in two winter wheat fields to assess weed control and quantify the amount of herbicide applied with a GIS map-based patch sprayer. Site specific weed management decisions were based on previously acquired weed distribution maps and an economic weed threshold model. A weed treatment map (on-off) was generated and georeferenced to control the sprayer. A global positioning system was used to locate the sprayer in the field. In both fields, Alopecurus myosuroides was observed at low infestation levels, Galium aparine at medium infestation levels and the mean density for other broadleaf species exceeded 40 weed seedlings m(-2) in both fields. Herbicide application was recommended for 58.3% of the first held and 54.6% of the second field. With the patch sprayer used for this study, 21% less herbicides were sprayed compared to an uniform broadcast application. Additional assessments of weed density in the first field 3 and 6 weeks after site specific weed control showed that almost the entire field was weed free. The results of this study demonstrated that site specific weed control was technically feasible but further investigations are needed to verify and evaluate site specific weed control methods.
引用
收藏
页码:219 / 225
页数:7
相关论文
共 25 条
[1]  
CHRISTENSEN S, 1996, 2 INT WEED CONTR C C
[2]  
CHRISTENSEN S, 1994, ASPECTS APPL BIOL, V37, P171
[3]  
COUSENS R, 1987, Plant Protection Quarterly, V2, P13
[4]   A SIMPLE-MODEL RELATING YIELD LOSS TO WEED DENSITY [J].
COUSENS, R .
ANNALS OF APPLIED BIOLOGY, 1985, 107 (02) :239-252
[5]  
FELTON WL, 1992, AGR ENG, V73, P9
[6]   Mapping and geostatistical analysis of weed distribution in sugarbeet fields for site-specific weed management [J].
Gerhards, R ;
Sokefeld, M ;
Knuf, D ;
Kuhbauch, W .
JOURNAL OF AGRONOMY AND CROP SCIENCE-ZEITSCHRIFT FUR ACKER UND PFLANZENBAU, 1996, 176 (04) :259-266
[7]  
ISAAKS EH, 1989, APPL GEOSTATISTICS, P249
[8]   A SIMULATION OF HERBICIDE USE BASED ON WEED SPATIAL-DISTRIBUTION [J].
JOHNSON, GA ;
MORTENSEN, DA ;
MARTIN, AR .
WEED RESEARCH, 1995, 35 (03) :197-205
[9]  
LINDQUIST JL, 1997, IN PRESS ANN APPL BO
[10]   FIELD-SCALE ESTIMATES OF GRASS WEED POPULATIONS IN ARABLE LAND [J].
MARSHALL, EJP .
WEED RESEARCH, 1988, 28 (03) :191-198