Utilization of herbicidal combinations to overcome weeds problems in transplanting onion under Egyptian conditions | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 14, Issue 2, December 2006, Pages 257-269 PDF (179.4 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2006.460750 | ||
| Author | ||
| Farid S. Sabra* | ||
| Pesticide Chemistry Dept., Fac. of Agric. Alex. Univ., Alex., Egypt. | ||
| Abstract | ||
| Two field trials were conducted on furrow-irrigated onion (Allium cepa cv. Giza 20) at the Agricultural Research Experimental Station, Faculty of Agriculture, Alexandria University (Abbis region), during the growing winter seasons 2003 and 2004, to evaluate the efficiency of certain herbicidal combinations in controlling weeds associated with onions fields. Six herbicidal treatments (napropamide, propachlor, ametryn, metribuzin, oxadiargyl, and oxadiazon) were applied twice as pre-transplanting and followed by two post–emergence herbicidal treatments; Oxyfluorfen and Ioxynil. Each one was combined with the previous six pre-emergence herbicide to get twelve herbicide combinations to solve the weed problem in onions field. Hand weeding, and weed free as well as un-weeded check were also included in each of the two seasons. The effectiveness of the herbicidal combinations was dependent on choose of which pre-emergence compound applied and the sequential post-emergence one. All the tested compounds which applied pre-transplanting are promising combined with oxyflurofen as post-transplanting. The superior in this respect was napropamide followed by oxadiazone, ametryn and metribuzine. On the other hand, the situation which contains less grassy weeds successive with the ioxynil combinations, it considered less expensive than hand cultivation. The unrestricted weeds growth in un-weeded check, were reduced bulb yield by 53.2-69.1%. The non-chemical control increased the onion yield by 114 -178.5 %. While, the increasing percentages in onion bulb due to herbicides combination were ranged from 150.4 to 223.2 %. | ||
| Keywords | ||
| Herbicides combinations; weed control; onion | ||
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