Effect of Foliar Spraying of Some Chelated Microelements on Growth, Yield and Chocolate Spot Disease Severity of Faba Bean

Abstract

Field experiment using three faba bean cultivars namely Sakha 1, Sakha 4 and Giza 716 was carried out to study the efficacy of foliar spraying chelated Fe, Mn and Zn individually on vegetative growth, yield and its components, some biochemical constituents and its relation to chocolate spot disease severity caused by Botrytis fabae Sard. during two successive seasons 2017/2018 and 2018/2019 at Etay El-Baroud Agricultural Research Station Farm, El-Beheira Governorate. Sakha 1 cv. had the highest shoot dry weight and leaf area/plant in both seasons. Sakha 4 cv. was the earliest flowering and maturity in the first and second seasons, respectively. Sakha 4 cultivar had the tallest plant and the heaviest 100-seed weight in both seasons, but Giza 716 had the highest number of pods/plant, seed yield /plant and seed yield/fed. in the first season, however Sakha 4 cv. was surpassed the other cultivars in the second season. Chelated Fe, Mn and Zn foliar spray had excellent effects in increasing faba bean growth and yield compared to the fungicide Mancozeb and control treatments. Zn treatment significant increased mean values of shoot dry weight, leaf area/plant, number of branches/plant and seed yield/plant in both seasons. Also, it had the first grade in case of the plant height and seed yield/fed. in the first season, only. Fe treatment significantly increased number of pods/plant and 100-seed weight in the first season, and seed yield/fed. in the second season. Giza 716 cv. had the highest content of chlorophyll a, chlorophyll b and chlorophyll a+b in both seasons. Sakha 4 cv. had the highest percentage of the seed carbohydrates and protein contents. In case of peroxidase and polyphenol oxidase activities, Giza 716 cv. had the first grade. Fe significantly increased chlorophyll a in the first season and chlorophyll b and chlorophyll a + b in both seasons. Zn treatment significantly increased seeds total carbohydrates%, total protein %, leaves peroxidase and polyphenol oxidase activities. Sakha 1 cv. had the least chocolate spot disease severity in the first season and Giza 716 in the second season. The three tested faba bean cultivars sprayed with Mancozeb reduced disease severity in both seasons followed by Fe in the first season and Zn in the second one. Data clear that there were negative association between disease severity and peroxidase and polyphenol oxidase activities in all cases. So it could be concluded that the used micronutrients could resist the detrimental effects of Botrytis fabae on the plant growth and improve yield production.

Response of Faba Bean to Foliar Spraying with Chelated Iron under different Nitrogen Fertilization Treatments in Sandy Soils

“…While the positive effect of iron on weight of seeds per plant might be attributed to the increasing in pods weight per plant, shelling percentage, number of seeds per pod and the average of seed weight. These results are in accordance with those stated by Abdo andAttia (2007), Al-Hiji (2014), Salem et al (2014), Al-Zubaidy and Al-Bawee (2018), El-Shafey et al (2019), Fadhil andjader (2020) andNour El-Din et al (2020).…”

“…The beneficial effect of foliar spraying with iron on growth, yield, its components and yield quality of faba bean were recorded by El-Gizawy (2003), Abdo and Attia (2007), Nassar (2007), Knany et al (2009), Fusial et al (2012), Abd El-Razek et al (2013), Al-Hiji (2014, Salem et al (2014), El-Sobky and Yasin (2017), Abdel-Salam (2018, Attiya et al (2019), El-Shafey et al (2019), Fadhil and jader (2020), Nour El-Din et al (2020 and El-Mansy et al (2021).…”

Influence of Nitrogen Fertilization and Foliar Spraying with Chelated Iron on Growth and Quality of Faba Bean in Sandy Soils

“…The beneficial effect of foliar spraying with iron on growth and yield quality of faba bean were recorded by El-Gizawy (2003), Abdo and Attia (2007), Fusial et al (2012), Abd El-Razek et al (2013), El-Tantawy and Nawar (2013), Al-Hiji (2014, Salem et al (2014), Abdel-Salam (2018), Al-Zubaidy and Al-Bawee (2018), Alabboudh and Saad (2019), Attiya et al (2019), El-Shafey et al (2019), Fadhil andJader (2020), Nour El-Din et al (2020) and El-Mansy et al (2021).…”