[Weed control in olive orchards [Convolvulaceae; Cynodon dactylon; Cyperus rotudus; Digitaria sangurialis; Echinochloa crusgalli; Dactylis glomerata]]
1986
Da'u, M. | Al-Saghir, A. (American Univ., Beirut (Lebanon))
Field experiments were performed during 1981, and 1982, 1983 under olive trees in Lebanon in order to evaluate the efficacy of various herbicides for weed control. The weeds included perennials such as Convolvulus arvensis, Cynodon dactylon and Cyperus rotudus, and annuals such as Digitaria sangurialis, Echinochloa crusgalli and Dactylis glomerata. Glyphosate at 4 and 6 kg/ha (a.i.) was effective in controlling all perennial weeds. However, C. dactylon was sensitive to dalapon at 4 and 6 kg/ha, whereas C. arvensis and C. rotudus were more tolerant to this herbicide. It was found that diuron, when mixed with either oryzalin or napropamide, controlled all annual weeds. On the other hand UBI S734 was highly effective on the various weeds sprayed, three months after its application. Olive yields in the treated plots were similar to the handweeded plots, but significantly higher than the unweeded plots. In addition, this herbicide did not cause any phytotoxicity symptoms on the olive seedlings, and did not affect the mineral contents of their leaves
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