Infection of chickpea (Cicer arietinum) by crenate broomrape (Orobanche crenata) as influenced by sowing date and weather conditions Diego Rubiales, Cristina Alcántara, Alejandro Pérez-de-luque, Juan Gil and Josefina Carmen Sillero Agronomie, 23 4 (2003) 359-362 DOI: 10.1051/agro:2003016