Investigating broomrape (Orobanche aegyptiaca) populations diversity in response to herbicides and banzotiadiazol in tomato (Lycopersicum esculentum)

Knowledge about population diversity of broomrape in response to herbicides can help to better management this parasite. This experiment was carried out in a factorial with randomized complete block design with 3 replications under natural condition. First factor was broomrape populations and second factor was included active ingredient (a.i) of glyphosate (41%EC) at 21 & 41 ml ha-1 and sulfosulfuron (75%WG) at 27 & 50 g a.i ha-1, and 15, 20 and 30 ppm banzotiadiazol (BTH) sprayed 30, 40 & 50 days after transplanting or DAT. Density and dry weight reduction percentages of broomerape and yield loss of tomato were estimated. In all population except Oromieh 50 g a.i ha-1 sulfosulfuron was the best treatment (80% control). But only Behshahr broomrape population was completely controlled. Oromieh broomrape population was controlled 80%with 41 ml a.i ha-1glyphosate. All dosages of banzotiadiazol except 30 ppm a. i. ha-1, couldn’t control broomrape populations.