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Broomrape is a determining factor for faba bean cultivation in Egypt especially under sandy soil conditions. For this reason two field experiments were conducted in naturally infested fields with broomrape under sandy soil conditions at Ismailia Agricultural Research Station, Ismailia governorate during 2014/15 and 2015/16 winter seasons to study the effect of degree interaction between three faba bean varieties namely Giza843, Misr3 and Giza 3, two seeding rates at 30 and 60kg seed/fed. and two broomrape control treatments namely Roundup twice at 75 cc/fed. and untreated check on broomrape management and faba bean productivity. A split split plot design with three replicates was used, faba bean varieties were assigned to the main plots and seeding rates were allocated in sub plots, while weed control treatments were distributed randomly in sub sub plots. Results revealed that both faba bean varieties Misr3 and Giza843 exhibited significant decrease in numbers and weight of broomrape spikes/m2 estimated by 87.0 and 91.0% & 49.2 and 53.3 % in 2014/15 winter season and by 86.1 and 90.6% & 47.9 and 54.5 % in 2015/16 winter season, respectively as compared with the susceptible variety Giza 3. Faba bean varieties Misr3 and Giza843 significantly increased faba bean yield and its components in both seasons as compared with variety Giza 3. Seed rate of 30kg/fed. significantly decreased the number and weight of broomrape spikes/m2 by 16.8 and 11.5% in 2014/15 winter season and by 15.3 and 18.0% in 2015/16 winter season, respectively as compared to seed rate of 60kg/fed. Seed rate of 30kg/fed. significantly increased faba bean yield components in both seasons except plant height and seed yield (ardab/fed.) which significantly decreased with seed rate of 30kg/fed. in both seasons as compared to seed rate of 60kg/fed. Roundup applied twice significantly decreased the number and dry weight of broomrape spikes/m2 by 75.2 and 73.1% in the first seasons and by 72.6 and 69.8% in the second season, respectively, as compared with untreated check. Roundup applied twice significantly increased faba bean yield and its components in both seasons as compared with untreated check. The increases in seed yield (ardab/fed.) were 89.1 and 86.3% in the first and second seasons, respectively, as compared with untreated check. Analysis of the role of studied broomrape control measures and their possible integration was analyzed and correlation between broomrape infestation levels with faba bean seed yield was negative. Thus, from this study the best control package for growing faba bean in sandy soil infested with broomrape is by planting Misr 3 or Giza 843 cultivars through November with 2 sprays of Roundup at 30 kg/seeding rate in infested fields with broomrape in Ismailia area.

alexandria journal of agricultural research

Evaluation of Integrated Broomrape (Orobanche crenata) Management Packages under Effect of Varieties, Seeding Rates and Roundup Treatmet in Faba Bean under Sandy Soil Conditions