Biology, life sciences Cuscuta Egyptian broomrape GC-MS analysis Orobanche Phelipanche Phelipanche aegyptiaca Research & information: general Striga Striga hermonthica anthocyanin branched broomrape broomrape (Orobanche cumana) broomrape resistance carotenoid chemical control chemigation chickpea chickpea phenotype chlorophyll crop safety drip irrigation ethametsulfuron-methyl feeding mode food chain germination stimulant glyphosate heavy metal herbicide holoparasite