Abstract
Two years field and greenhouse studies were carried out to evaluate the efficacy of sub-lethal doses of glyphosate (Round upR), ammonia gas, phosphoric acid and sulfuric acid against Phelipanche aegyptiaca in potato. Results showed that sequential application of sub-lethal doses of glyphosate at all tested rates significantly reduced P. aegyptiaca shoot number and shoot dry weight. While, the use of ammonia gas, phosphoric acid and sulfuric acid had no significant effect on the total level of P. aegyptiaca infection as compared to the control. The best results considering both P. aegyptiaca control and selectivity in potato were obtained by sequential application of sub-lethal doses of glyphosate at 60 and 80 g·ai·ha-1. Sequential application of glyphosate at 60 g·ai·ha-1 reduced P. aegyptiaca infection by 100% after 100 days after potato emergence (DAPE). Except for sequential application of glyphosate at 60 and 80 g·ai·ha-1, all tested rates enhanced the maturity rate of potato plants and decreased the number of marketable potato tubers.
Highlights
Potato (Solanum tuberosum) is considered one of the most important strategic crops in the Mediterranean region
Methyl bromide and single or sequential application of sub-lethal doses of glyphosate at 125, and 150 g ai/ha applied 20, 40, and 60 days after potato emergence (DAPE) significantly reduced P. aegyptiaca total shoot number and total shoot dry weight 100 DAPE compared to the control (Table 1) All these treatments reduced P. aegyptiaca infection by 100%
Sequential application of glyphosate at all tested rates significantly reduced shoot and dry weight of P. aegyptiaca 100 DAPE compared to the control
Summary
Potato (Solanum tuberosum) is considered one of the most important strategic crops in the Mediterranean region. In Lebanon, the Beq’aa and Akkar provinces are the main potato producing areas in the country, with about 68% and 19% of the total production, respectively [1]. Potato is susceptible to several pests among which P. aegyptiaca. This parasitic weed parasitizes summer, spring and autumn planted potatoes across Lebanon and the Mediterranean region. Phelipanche aegyptiaca Forsk (Branched broomrape) is an aggressive root holoparasite that infects roots of. How to cite this paper: Haidar, M. and Shdeed, E. (2015) Phelipanche aegyptiaca Management with Glyphosate in Potato. American Journal of Plant Sciences, 6, 2540-2549.
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