الفهرس 
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Abstract
Egypt, A two–year field trail was undertaken in 2015/16 and 2016/17 winter seasons.
The experiment included eight practices for broomrape control applied with two faba bean genotypes as follow:
I. Broomrape control treatments
1. Compost,
2. Biochar,
3. Isobutyl isophethalate, 250 ppm,
4. Isobutyl isophethalate, 375 ppm,
5. Isobutyl isophethalate, 500 ppm,
6. Isobutyl isophethalate, 625 ppm,
7. Glyphosate–isopropylammonium,
8. Unweeded.
II. Faba bean cultivars
1. Misr–3,
2. Sakha–1.
The trail design was a strip–plot in completely randomized block design in six replications
Assessments
I. Broomrape traits
1. Number of broomrape shoots plot–1
2. Weight of broomrape shoots plot–1
3. Number of broomrape–infected faba bean plants plot–1
SUMMARY
Aisa K. H. (2019), MsC. Fac. Agric., Ain Shams Univ.
50
II. Crop traits
1. Growth traits
At 105 DAS, 6 faba bean plants were randomly chosen from each plot to estimate SPAD value, plant height, branches number plant−1, pods number plant−1, pods dry weight plant−1 and total dry weight plant−1.
2. Yield attributes
At harvest, 10 faba bean plants were randomly chosen from each plot to estimate seeds weight plant−1 and weight of 100 seeds. Moreover, whole plants of the experimental unit were harvested to estimate straw and seed yields fed–1.
3. Seed Chemical composition
Seed total nitrogen content was determined, then seed protein content was computed
III. Regression relationships
Regression analysis between faba bean seed yield ha−1 (dependent variable) and each of number and dry mass of broomrape shoots and number of infected faba bean plants plot−1 (independent variables) was derived
The obtained results can be summarized as follows:
1. Compared to the unweeded, in plots of Misr–3, all weeded treatments in both seasons as well as plots of Sakha–1 treated by isobutyl, 625 ppm (in the first season) or glyphosate, isobutyl, 625 ppm, isobutyl, 375 ppm, biochar and compost (in the second season), number of broomrape shoots plot–1 was markedly lowered.
2. Remarkable effect of the interaction between broomrape control treatment and faba bean cultivar on weight of broomrape shoots
SUMMARY
Aisa K. H. (2019), MsC. Fac. Agric., Ain Shams Univ.
51
plot–1 in 2015/16 and 2016/17 seasons. In this regard, Misr–3 x glyphosate or isobutyl, 625 ppm and Sakha–1 x glyphosate in 2015/16 possessed the maximum reductions. Moreover, in 2016/17 season, all possible interactions between weeded treatments and faba bean cultivars gave well effects and statistically equaled in reducing weight of broomrape shoots plot–1 except for Misr–3 x isobutyl, 500 ppm or isobutyl, 625 ppm and Sakha–1 x biochar.
3. With the exception of isobutyl, 375 ppm and isobutyl, 500 ppm treatments in 2015/16 season, the other weeded treatments carried out in Misr–3 plots caused the maximum reduction in plants infected by broomrape plot–1 uring the two seasons. Similar findings were gained with the interactions of Sakha–1 x glyphosate (in both seasons) as well as Sakha–1 x isobutyl, 375 ppm, isobutyl, 625 ppm or biochar (in the 2nd season).
4. Except for isobutyl, 250 ppm or biochar in the 1st season, treated Sakha–1 with any weeded practices in both seasons showed higher SPAD values. These combinations significantly equaled with Misr–3 x biochar in the 1st season and Misr–3 x any weeded practices (except isobutyl, 250 ppm) in the 2nd one.
5. Except for isobutyl, 250 ppm and isobutyl, 500 ppm in the 1st season as well as isobutyl, 625 ppm in the 2nd one, treating Misr–3 plants with other weeded practices recorded similar branches number per plant in both seasons, surpassing the unweeded.
6. Isobutyl, 375 ppm along with compost, biochar, isobutyl, 250 ppm and glyphosate in the first season in addition to isobutyl, 625 ppm in the second one applied in Misr–3 plots showed the remarkable pods number per plant.
7. Several distinctive combinations between weeded practices and cultivars had favorable effect on pods dry weight per plant. In
SUMMARY
Aisa K. H. (2019), MsC. Fac. Agric., Ain Shams Univ.
52
this respect, plots of Misr–3 treated by compost, biochar or isobutyl, 500 ppm (in both seasons); isobutyl, 375 ppm (in the 1st season) and glyphosate or isobutyl, 500 ppm (in the 2nd season) showed the maximum values. Such interactions statistically leveled with the combinations of Sakha–1 x isobutyl, 500 ppm; isobutyl, 625 ppm or glyphosate obtained in the 2nd season.
8. The significant interaction clarified that all weeded x Misr–3 in both seasons, except isobutyl, 250 ppm in the 1st season, promote the accumulation of dry mass of faba bean plant surpassing the unweeded. Also, Sakha–1 x compost or biochar in 2015/16 season and Sakha–1 x biochar or isobutyl, 250 ppm in 2016/17 were as similar as the former combinations.
9. In pots received Isobutyl, 500 ppm (in 2015/16) or and biochar (in 2016/17), Misr–3 cultivar showed the values of seed weight per plant.
10. In Sakha–1 plots, glyphosate in the 1st season and isobutyl, 250 ppm in the 2nd one showed the maximum values of weight of 100 seeds. While the lowest values were obtained with biochar either with Sakha–1 in 2015/16 or Misr–3 in 2016/17.
11. In plots of Misr–3 or Sakha–1, isobutyl, 625 ppm was as similar as isobutyl, 500 ppm, isobutyl, 375 ppm, biochar and glyphosate used in Misr–3 plots in the 1st season for producing well straw yield. Beside the former distinctive interactions in the 1st season, Misr–3 x compost as well as Sakha–1 treated with isobutyl, 500 ppm, isobutyl, 375 ppm, glyphosate or biochar were also marked combination in this respect.
12. Application of isobutyl, 500 ppm in Misr–3 plots possessed the maximal seed yield exceeding the other combinations in 1st season. Such excelsior interaction statistically leveled with all
SUMMARY
Aisa K. H. (2019), MsC. Fac. Agric., Ain Shams Univ.
53
weeded practices applied in Misr–3 plots, except compost, in the 2nd season in this regard.
13. Planting Misr–3 in biochar-treated soil led to produce the maximum values of seed protein content.
14. In plots received Isobutyl, 500 ppm (in 2015/16) or Isobutyl, 675 ppm (in 2016/17), Misr–3 cultivar possessed the maximum protein yield.
15. According to regression equations, there is a significant and negative relation between faba bean seed yield either with number and dry weight of broomrape shoots or number of infected faba bean plants plot−1. from R2 value of each, it is observed that dry weight of broomrape shoots plot−1 parameter is more effective in exhibiting changes in seed yield, since 72.9 % of these changes were attributed to such parameter