Integrated weed management of wheat under sprinkler irrigation in south Tahreer region in Egypt. 1- Effectiveness on different types of weeds | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 20, Issue 1, 2012, Pages 97-114 PDF (1.42 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2012.462322 | ||
| Authors | ||
| F. S. Soliman; F. S. Sabra* | ||
| Pesticide Chemistry Department, Faculty of Agriculture, Alexandria University, Egypt. | ||
| Abstract | ||
| Two field trials of wheat crop (Triticum aesitivum var. sids 6) were carried out in reclaimed desert land at South Tahreer region in Egypt during 1996- 1998 seasons, to evaluate the efficacy of three sowing methods and herbicidal treatments, under hand move sprinkler irrigation system. The methods of sowing are pre-irrigation with tillage before seeds drilling, pre-irrigation with contact herbicide and non pre-irrigation before sowing. Twenty herbicidal treatments, including tribenuron-methyl, metosulam, chlorosulfuron, isoproturon. , fenoxa prop-ethyl, tralkoxydim, diclofop-methyl, flamprop-isopropyl, clodinafop-propargyl and imazamethabenz-methyl and some of their combinations, were studied for controlling grassy and broad-leaved weeds under optimum cultural practices management. The annual weeds observed in the course of this location included spiny emex, black mustard, thimble mustard, clover lambsquarters, scarlet pimpernel, thowthistle, wild oat, annual blue grass and canary grass. Among these thimble mustard and blue grass weeds were the most dominant weeds in the first season, whereas wild oat, ryegrass and thimble mustard were the dominant in the second season. Infestations of grassy weeds in the second season were greater than those recorded in the first season, since wild oat was the dominant weed in this case. The lowest grassy and total weeds were obtained with pre-irrigated with contact herbicide before wheat sowing compared with pre-irrigated with tillage or with non pre- irrigated system. Chemical weed control proved to be an effective way for controlling broad leaf and grassy weeds, under the sowing of pre-irrigation system. In this respect all herbicidal treatments except tribenuron-methyl, metosulam and chlorosulfuron, gave best control to grassy weeds, so the highest values were obatined with isoproturon + fenoxaprop-ethyal and isoproturon + diclofop-methyal in both seasons. Fenoxaprop ethyl tralkoxydim, clodinafop- propargyl, diclofop-methyl, dopler and imazamethabenz-methyl were effective against most of grassy weeds except annual blue grass and isoproturon the only herbicide which gave good results against this weed. On the other hand, metosulam, tribenurom-methyl and chlorosulfuron gave best control against broad leaf weeds. Isoproturon gave good control to many broad leaf and grassy weeds, but caused some phytotoxicity to wheat plants. Most herbicidal combinations were effective against all weeds, particularly, metosulam + clodinafop which was suprior in this respect. The general results in two seasons showed that, pri-irrigation with tillage or with contact herbicide improved wheat grain yield, compared with non-pre-irrigation and all the herbicidal treatments increased significantly wheat grain yield compared with unweeded check. | ||
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