Latest Research News on Foliar Spray: Feb – 2020
Potassium Silicate as Foliar Spray and Rice Blast Control
Silicon (Si) is understood as a “beneficial element” for plants. The direct and indirect benefits of the element for crops (especially grasses) are associated with resistance to diseases, pests, and drought. Since most studies were through with fertilizers applied to the soil, new studies on the efficacy of silicon absorption through the leaves are required. The effect of silicon absorption through the leaves on rice blast (Pyricularia oryzae) control was studied using potassium silicate (K2SiO3) in several doses (0, 1, 2, 4, 8, or 16 g L− 1 Si), number of sprayings at two solution pHs. Rice (Oryza sativa), cultivar ‘Metica 1’ (susceptible to blast), was grown in pots during a completely randomized experimental design. Silicate was applied beginning at the 22nd day after emergence (DAE). The pathogen was inoculated on the 25th DAE. Disease incidence was evaluated ten days after inoculation. Potassium silicate pulverization on the leaves didn’t increase Si absorption or accumulation by the plant; however, there was a discount on blast incidence. 
Effect of foliar spray of nutrient solutions on photosynthesis, dry matter accumulation and yield in seawater-stressed rice
The effects of seawater salinity and foliar application of nutrient solutions on rice within the early tillering stage and early reproductive phase of growth were investigated during a glasshouse. During early tillering stage, from 10 to 35 days after transplanting (DAT) and therefore the early reproductive phase, from 75 to 100 DAT, potted rice plants were irrigated with Japan seawater of 0, 8.8, 17.5 and 35% (equivalent to an EC of 0.9, 5.7, 11.5 and 21.5 ms cm−1, respectively). The nutrient solution of 1 mM Ca(NO3)2, MnSO4 or K2HPO4 was sprayed twice every week until the answer ran off the leaves. Photosynthesis and its related parameters were measured at 30 and 95 DAT within the early tillering stage and within the reproductive growth phase, respectively. Seawater salinity diminished photosynthesis rate and photosynthesis-related parameters, like stomatal conductance, intercellular CO2 concentration, leaf water and osmotic potential and relative leaf water content in both growth stages and have reduced tiller number, leaf area and top dry matter content in tillering stage. 
Effects of zinc and manganese as foliar spray on pomegranate yield, fruit quality and leaf minerals
Effects of foliar sprays of zinc and manganese sulfates on the fruit yield and quality also as leaf nutrients concentration of pomegranate were studied during 2010 season in an orchard with a soil pH of seven .5 and EC of 5.2 (dS m-1). Zinc and manganese sulfates were applied twice at the speed of 0, 0.3 and 0.6 percent under a factorial design on the bottom of completely randomized blocks. Mn sprays had positive significant effects on the fruit yield, the aril/peel ratio, TSS, weight of 100 arils. juice content of arils, anthocyanin index, fruit diameter and leaf area. Zn effects were also significant for TSS, TSS/TA ratio, juice content of arils and leaf area. Foliar spray of Mn significantly increased Mn and N but decreased Zn and Cu concentrations in leaves. Foliar sprays of Zn significantly increased Zn but decreased Mn and P concentrations within the leaves. consistent with the results, the acceptable combination of those two micronutrients for studied characters of pomegranate under prevailing conditions was foliar spray of 0.6% MnSO4 and 0.3% ZnSO4. 
Alpha-tocopherol fertigation confers growth physio-biochemical and qualitative yield enhancement in field grown water deficit wheat (Triticum aestivum L.)
Water stress may be a major problem to satisfy the planet food demand and to unravel the matter of malnutrition. Different strategies are getting used to unravel these problems including the fertigation of plants with different biochemical at different growth stages. this study was conducted for the induction of drought tolerance in field grown wheat for better yield and nutritional quality through foliar spray of α-tocopherol (α-Toc) at start of reproductive stage. Water stress was maintained supported number of irrigation. Three levels of α-Toc 0.001, 0.01 and 0.1 mM were applied as foliar spray. Water stress significantly reduced the biomass production that related to the decreased photosynthetic pigments, water relation, photosynthetic efficiency, but increased the lipid peroxidation, leaf relative membrane permeability, activities of antioxidant enzymes and therefore the contents of phenolic, flavonoids, α-toc and ASA. 
The Effect of Some Growth Regulators Foliar Sprayed with the Fertilization by Fe and Zn on the Yield and Quality of Lentil Grown in Sandy Soil
Aims: A field experiment has been administered under the sandy soil conditions. Its aim was to guage the effect of some plant growth regulators (PGRs) foliar sprayed along side the fertilization by Fe and/or Zn on the lintel (Lens culinaris Medikus) yield and quality.
Study Design: an entire randomized block design.
Place and Duration of Study: Winter seasons of 2016/2017 – 2017/2018 at the Ismailia Agricultural Research Station, (30° 35′ 30″ N 32° 14′ 50″ E elevation 3 m), Agricultural research facility (ARC) – Egypt.
Methodology: The PGRs foliar sprayed included the recommended doses of gibberellin (GA3, 100 ppm), 2-hydroxybenzoic acid (SA, 100 ppm), K-humate (6000 ppm) and K-silicate (K2SiO3, 200). The Fe (60 ppm) and/or Zn (100 ppm) were applied as EDTA chelated. Lintel grains were inoculated by efficient strained Rhizobium leguminosarum then sowed. Foliar spray of the various treatments was administered 30, 45, and 60 days after sowing. 
 Buck, G.B., Korndörfer, G.H., Nolla, A. and Coelho, L., 2008. Potassium silicate as foliar spray and rice blast control. Journal of Plant Nutrition, 31(2), (Web Link)
 Sultana, N., Ikeda, T. and Kashem, M.A., 2001. Effect of foliar spray of nutrient solutions on photosynthesis, dry matter accumulation and yield in seawater-stressed rice. Environmental and Experimental Botany, 46(2), (Web Link)
 Hasani, M., Zamani, Z., Savaghebi, G. and Fatahi, R., 2012. Effects of zinc and manganese as foliar spray on pomegranate yield, fruit quality and leaf minerals. Journal of soil science and plant nutrition, 12(3), (Web Link)
 Alpha-tocopherol fertigation confers growth physio-biochemical and qualitative yield enhancement in field grown water deficit wheat (Triticum aestivum L.)
Qasim Ali, Shafaqat Ali, Naeem Iqbal, Muhammad Tariq Javed, Muhammad Rizwan, Roubina Khaliq, Sumreena Shahid, Rashida Perveen, Saud A. Alamri, Mohammed Nasser Alyemeni, Leonard Wijaya & Parvaiz Ahmad
Scientific Reports volume 9, (Web Link)
 A. Hussien, R., T. Rashad, R., A. El-Kamar, F. and S. Mohamed, M. (2018) “The Effect of Some Growth Regulators Foliar Sprayed with the Fertilization by Fe and Zn on the Yield and Quality of Lentil Grown in Sandy Soil”, Asian Journal of Soil Science and Plant Nutrition, 3(2), (Web Link)