EFFECT OF CROPSIL ON THE YIELD OF THOMPSON SEEDLESS GRAPES

V. C. Malshe, Rajan Raje, Shailesh Chidrawar, Rupali Hande

Abstract


Silicon is the second most abundant element in the earth crust after oxygen. (28.8%) and is mostly found as silicon di
oxide or as a compound with iron, aluminium or calcium as their silicate. It is also found as Silicon Di Oxide as simple
sand. By ashing a number of plant species, we have observed it to be a part of all plant material without exception, not the
part contributed by the dirt or dust. All plants up take up silica as silicic acid dissolved in ground water as a complex with
Humic acid or fulvic acid. Crops like rice, grass, sugarcane have considerably higher concentration of silica, also varying
from part to part. For example, rice husk contains as much as 28% silica, probably the highest in any plant matter. This is
the reason for the highest water requirement of rice plantation. Silicon present in the soil is in a polymeric form, which is
unavailable form of Silicon for plant uptake. Generally, plants uptake monomeric form of Silica in soil i.e. plant available
silica as a complex with humic or fulvic acid, a poly phenolic substance formed by degradation of lignin in the ground.
Mono silicic acid (H SiO ) or Ortho silicic acid is the only form of Silicon di oxide that is completely bio-available to the 4 4
plants. As a salt of sodium, potassium silicic acid is too strongly bonded and can not be picked up by plant matter. There
is, therefore a need to stabilize ortho silicic acid in a monomeric form. The acid form of monomeric silicic acid in water is
very unstable and results in polymerization. The rate is highest at 7 pH. Acidic solutions are able to retain monomeric
form for little longer. NiChem Solutions, Thane have developed a new product – CROPSIL based on monomeric silica to
fulfil the requirement of Silicon as a beneficiary nutrient in plants, a composition which is highly stabilized in monomeric
form. As of writing this, the formulations have been stable for as long as six years with no signs of polymerization or
insolubility.
CropSil is a unique formulation of highly stabilized Orthosilisic acid (Monosilisic acid form). CropSil contains 3%
Orthosilisic acid which is 99.9% available form of Silicic acid. It has an alkaline pH. CropSil acts as a plant stress manager,
immunity booster, yield improver and a bio stimulant. It is a residue free, non-toxic and eco-friendly product. It has a
good stability compared to any other preparation in market and does not gel on shelf when stored in air-tight conditions
away from direct sunlight. ( Patent for the product is pending in India and US. The International Publication number of
CropSil is WO2016/135752 A2.)
Grape is a very sensitive crop in terms of atmospheric conditions, water availability and sugar content. Any biotic or
abiotic stress would affect the quality and quantity output of grapes. Optimum berry size and sugar content are key
factors for grapes to be acceptable especially in export market. Silica is known to help plants combat any kind of stress
and boost productivity. We, thus, conducted an experiment of CropSil on Thompson Seedless Grapes to study the grape
quality parameters and increase in yield.
This experiment was conducted at Khedgaon (Nasik) during 2016-2017. Three foliar applications of CropSil were taken
after pruning at 15 days interval @1.5ml/lit of dose.
nd Morphological characters were recorded after 2 spray of CropSil. Berry quality, size and yield increase (%) were recorded
at harvest. At the end of the experiment, we found that in CropSil treated plants, berry weight increased by 37.05%, bunch
weight by 28.58%, berry diameter by 8.17%, berry length by 9.92% and Brix increased by 1.8 unit as compared to Control.
Additionally, we observed that Copper toxicity was also reduced in treated plots as compared to control.


Keywords


CropSil, Thompson seedless Grapes, Yield booster, Grapes quality.

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