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Media type:
E-Article
Title:
COMPARISON OF CHEMICAL AND MECHANICAL WEED CONTROL STRATEGIES FOR COWPEA
Contributor:
Kahn, Brian A.;
Schatzer, Raymond Joe;
Nelson, Wendy A.
Published:
American Society for Horticultural Science, 1990
Published in:
HortScience, 25 (1990) 9, Seite 1097f-1097
Language:
Not determined
DOI:
10.21273/hortsci.25.9.1097f
ISSN:
0018-5345;
2327-9834
Origination:
Footnote:
Description:
The herbicides trifluralin, metolachlor, and paraquat were compared for efficacy of weed control in cowpea with and without cultivation as a supplemental strategy for two years. Herbicides also were compared against a no-herbicide control (with and without cultivation). Cultivation had no significant effect on seed yield, biological yield, or harvest index of cowpea. Paraquat, used in a “stale seedbed” system, was ineffective for weed control and did not change cowpea yield from that of the no-herbicide control. Trifluralin and metolachlor more then tripled cowpea seed yield compared to that of the no-herbicide control in 1988, when potential weed pressure was 886 g m-2 (dry wt.). Trifluralin and metolachlor did not significantly increase cowpea seed yield compared to that of the no-herbicide control in 1989, when potential weed pressure was 319 g m-2 (dry wt.). However, in 1989, these two herbicides each still increased net farm income by $206 per hectare compared to the income obtained without an herbicide.