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

Abstract

reason two field experiments were conducted in naturally infested fields with broomrape under sandy soil conditions atIsmailia Agricultural Research Station, Ismailia governorate during 2014/15 and 2015/16 winter seasons to study theeffect of degree interaction between three faba bean varieties namely Giza843, Misr3 and Giza 3, two seeding rates at 30and 60kg seed/fed. and two broomrape control treatments namely Roundup twice at 75 cc/fed. and untreated check onbroomrape management and faba bean productivity. A split split plot design with three replicates was used, faba beanvarieties were assigned to the main plots and seeding rates were allocated in sub plots, while weed control treatments weredistributed randomly in sub sub plots. Results revealed that both faba bean varieties Misr3 and Giza843 exhibitedsignificant decrease in numbers and weight of broomrape spikes/m2 estimated by 87.0 and 91.0% & 49.2 and 53.3 % in2014/15 winter season and by 86.1 and 90.6% & 47.9 and 54.5 % in 2015/16 winter season, respectively as comparedwith the susceptible variety Giza 3. Faba bean varieties Misr3 and Giza843 significantly increased faba bean yield and itscomponents in both seasons as compared with variety Giza 3. Seed rate of 30kg/fed. significantly decreased the numberand weight of broomrape spikes/m2 by 16.8 and 11.5% in 2014/15 winter season and by 15.3 and 18.0% in 2015/16winter season, respectively as compared to seed rate of 60kg/fed. Seed rate of 30kg/fed. significantly increased faba beanyield components in both seasons except plant height and seed yield (ardab/fed.) which significantly decreased with seedrate 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 and73.1% 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 withuntreated 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 theirpossible integration was analyzed and correlation between broomrape infestation levels with faba bean seed yield wasnegative.Thus, from this study the best control package for growing faba bean in sandy soil infested with broomrape is byplanting Misr 3 or Giza 843 cultivars through November with 2 sprays of Roundup at 30 kg/seeding rate in infested fieldswith broomrape in Ismailia area.