News Update on Foliar Spray Research: May – 2019

Potassium Silicate as Foliar Spray and Rice Blast Control

Silicon (Si) is understood as a “beneficial element” for plants. The direct and indirect edges of the component for crops (especially grasses) square measure associated with resistance to diseases, pests, and drought. Since most studies were finished fertilizers applied to the soil, new studies on the effectiveness of atomic number 14 absorption through the leaves square measure needed. The impact of atomic number 14 absorption through the leaves on rice blast (Pyricularia oryzae) management was studied mistreatment metal salt (K2SiO3) in several doses (0, 1, 2, 4, 8, or sixteen g L− one Si), range of sprayings at 2 resolution pHs. Rice (Oryza sativa), vascular plant ‘Metica 1’ (susceptible to blast), was adult in pots during a fully randomised experimental style. salt was applied starting at the twenty second day when emergence (DAE). The infectious agent was inoculated on the twenty fifth DAE. illness incidence was evaluated 10 days when immunisation. metal salt pulverization on the leaves didn’t increase Si absorption or accumulation by the plant; but, there was a discount on blast incidence. the best reduction on blast incidence was determined at four g Si L− one, in spite of resolution hydrogen ion concentration. [1]

Effect of foliar spray of nutrient solutions on photosynthesis, dry matter accumulation and yield in seawater-stressed rice

The effects of saltwater salinity and foliar application of nutrient solutions on rice within the early tillering stage and early fruitful section of growth were investigated in a very building. throughout early tillering stage, from ten to thirty five days once transplant (DAT) and therefore the early fruitful section, from seventy five to a hundred DAT, potted rice plants were irrigated with Japan saltwater of zero, 8.8, 17.5 associate degreed thirty fifth (equivalent to an world organization of zero.9, 5.7, 11.5 and 21.5 ms cm−1, severally). The nutrient answer of one metric linear unit Ca(NO3)2, MnSO4 or K2HPO4 was sprayed doubly every week till the answer ran off the leaves. chemical process and its connected parameters were measured at thirty and ninety five DAT within the early tillering stage and in the fruitful growth section, respectively. saltwater salinity diminished chemical process rate and photosynthesis-related parameters, like stomatal electrical phenomenon, living thing carbon dioxide concentration, leaf water and diffusion potential and relative leaf water content in each growth stages and have reduced tiller variety, leaf space and high dry matter content in tillering stage. we’ve conjointly studied the impact of salt-stress on the mineral content at thirty five DAT. Na+ concentration redoubled, whereas Ca2+, Mn2+ and K+ concentration were attenuate with increasing stress. saltwater attenuate fertile spikelets within the raceme, attenuate accumulation of dry matter within the grain and concomitantly decreased grain yield. Foliar spray of Ca(NO3)2, MnSO4 or K2HPO4 partly reduced the salt-induced nutrient deficiency, redoubled chemical process, dry matter accumulation, variety of fertile spike within the raceme and grain yield. Among the nutrient solutions, Ca(NO3)2 looked as if it would be the foremost effective, followed by MnSO4 and K2HPO4. These results urged that foliar application of nutrient solutions partly alleviates the adverse effects of salinity on chemical process and photosynthesis-related parameters, yield and yield parts through mitigating the nutrient demands of salt-stressed plants. [2]

Foliar spray of phosphates induces growth increase and systemic resistance to Puccinia sorghi in maize

A single foliar spray of 0‐1 M phosphate salts answer was applied to the top of maize (cv. Jubilee) leaves one,2 and three at the five‐to six‐leaf stage, 2‐4 h before immunization with genus Puccinia sorghi. This treatment iatrogenic general resistance against common rust as expressed by ninety eight reduction within the variety of pustules of P. sorghi developed on leaves five, 6 and 7, There was no harm or iron deficiency anaemia stippling on the iatrogenic leaves (1, two and 3) as a results of the phosphate spray, A less effective, however still important. reduction (90%) within the variety of pustules was obtained once the foliar spray was applied half dozen days before immunization. One foliar spray of K2HPO4 on leaves one,2 and 3,6 days before immunization, excited plant growth in spite of immunization. The foliar spray on the day of immunization was less effective in stimulating growth. applicable mixtures of phosphate solutions disclosed that the extent of protection wasn’t essentially addicted to the gradual changes within the hydrogen ion concentration of the answer. The attainable twin use of phosphate salts as foliar fertilizers and as agents for iatrogenic resistance is mentioned. [3]

The foliar application of a mixture of semisynthetic chitosan derivatives induces tolerance to water deficit in maize, improving the antioxidant system and increasing photosynthesis and grain yield

Research has shown that chitosan induces plant stress tolerance and protection, however few studies have explored chemical modifications of chitosan and their effects on plants beneath water stress. Chitosan and its derivatives were applied (isolated or in mixture) to maize hybrids sensitive to water deficit beneath greenhouse conditions through foliar spraying at the pre-flowering stage. once the appliance, water deficit was evoked for fifteen days. Analyses of leaves and organic chemistry gas exchange within the ear leaf were performed on the primary and fifteenth days of the strain amount. Production attributes were additionally analysed at the tip of the experiment. In general, the appliance of the 2 chitosan derivatives or their mixture potentiated the activities of the inhibitor enzymes SOD, catalase, ascorbate oxidase, glutathione enzyme and guaiacol oxidase at the start of the strain amount, additionally to reducing supermolecule peroxidation (malonaldehyde content) and increasing gas exchange and aminoalkanoic acid contents at the tip of the strain amount. The derivatives additionally magnified the content of phenolic resin compounds and also the activity of enzymes concerned in their production (phenylalanine ammonia lyase and aminoalkanoic acid ammonia lyase). Dehydroascorbate enzyme and compounds like total soluble sugars, total amino acids, starch, grain yield and harvest index magnified for each the derivatives and chitosan. However, the mixture of derivatives was the treatment that crystal rectifier to the upper increase in grain yield and harvest index compared to the opposite treatments. the appliance of unreal molecules derived from chitosan yielded bigger leaf gas exchange and a better incidence of the organic chemistry conditions that relieve plant stress. [4]

Quality and Nutrient Content of Grapes as Influenced by Foliar Spray of Different Sources of Zinc

Field experiments were conducted in grape garden (cv Dilkush) of 3 year recent throughout 2015-16 and 2016-17 to assess the result of various sources of metallic element on quality and nutrients content of grape by victimisation randomized block style with twenty treatments and 3 replications. The experimental results of the study indicated that among varied sources of metallic element, metallic element metalosate at zero.150 per cent metallic element level recorded considerably higher total soluble solids (17.49º Brix), total sugars (18.64%), N (1.74%), metallic element (1.89%), sulphur (0.52%), zinc (47.00 mg kg-1) and reduced titratable acidity (0.19%) within the fruit compared to regulate (T3) and alternative treatments however it absolutely was at par with the treatment T18 that received metallic element @ zero.150 per cent through Zn-EDTA. There was a non-significant distinction was determined among the treatments with relevancy atomic number 20, magnesium, copper, iron, atomic number 25 and chemical element content of fruit. [5]

Reference

[1] 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), pp.231-237. (Web Link)

[2] 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), pp.129-140. (Web Link)

[3] Reuveni, R., Agapov, V. and Reuveni, M., 1994. Foliar spray of phosphates induces growth increase and systemic resistance to Puccinia sorghi in maize. Plant Pathology, 43(2), pp.245-250. (Web Link)

[4] The foliar application of a mixture of semisynthetic chitosan derivatives induces tolerance to water deficit in maize, improving the antioxidant system and increasing photosynthesis and grain yield

Valquíria Mikaela Rabêlo, Paulo César Magalhães, Letícia Aparecida Bressanin, Diogo Teixeira Carvalho, Caroline Oliveira dos Reis, Decio Karam, Antônio Carlos Doriguetto, Marcelo Henrique dos Santos, Plínio Rodrigues dos Santos Santos Filho & Thiago Corrêa de Souza

Scientific Reportsvolume 9, Article number: 8164 (2019) (Web Link)

[5] H. Ramya, S. and T. Subbarayappa, C. (2018) “Quality and Nutrient Content of Grapes as Influenced by Foliar Spray of Different Sources of Zinc”, International Journal of Plant & Soil Science, 23(4), pp. 1-11. doi: 10.9734/IJPSS/2018/42326. (Web Link)

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