TITLE:
Phelipanche aegyptiaca Management with Glyphosate in Potato
AUTHORS:
Mustapha Haidar, Elie Shdeed
KEYWORDS:
Ammonia Gas, Glyphosate, Phelipanche aegyptiaca, Phosphoric Acid, Potato, Sulfuric Acid
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.6 No.16,
October
14,
2015
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.