this presentation deals with the new techniques which can be adopted for the preservation of potatoes from rotting.

1. Present BY-
Bhagyashree Srivastava (2nd
year)
EMERGING TECHNIQUES FOR
PRESERVATION
OF
POTATOES

2.  Freezing
 Blanching
 Cold storage
 Dehydration
 Home canning
GENERAL METHODS
FOR
PRESERVATION

3. Emerging techniques for
preservation
 Introduction of genetic engineering in
potato preservation.
 Preservation of potatoes by Diffused
Light Store DLS structure.
 Storing potatoes in pits (traditional
practice).

4. A genetically engineered potato is a potato that has had
its genes modified, using genetic engineering.
Goals of modification:
 introducing pest resistance
 tweaking the amounts of certain chemicals
produced by the plant, and
 to prevent browning or bruising of the tubers.
INTRODUCTION OF
GENETIC ENGINEERING

5. How to make GM potatoes?
 By using the tactic
“RNA interference”—
which allows scientists to essentially
switch off the genes responsible for
certain behaviors.
 Simplot’s experiment – introduced
genes from an Argentinian potato that’s
naturally resistant to blight into the
innate potato.
 Using transgenic potatoes

6. The insect resistant potato (by
GM)
 Genes which encodes Cry3A proteins
from bacterium Bacillus thurengenesis
are introduced.
 The protein affects only the target
pest.
 Results in decrease in usage of
pesticides by 42%.

7. 
 DLS = Diffused light store
 Simple and Low cost method
 Potatoes are harvested before the actual harvesting
time.
 Kept at a place where diffused sunlight passes
through the shutter.
 Can be stored upto 3-4 months.
THE DLS STRUCTURE

8. DLS STRUCTURE

9.  Consists of a pit, approximately 2.5 x 1.5 x 1 meter
with the bottom lined with sawdust or dry grass.
 Potatoes are placed on this lining and then covered
with a thin layer of soil.
 It is covered by a cupola shaped galvanized sheet
metal roof which protects it from sun and rain.
 To ensure adequate ventilation across the top of the
crop, wire mesh was fitted on top of each long side
wall up to the roof eaves on either side of the access
door.
 Can be stored upto 4 months.
STORAGE IN PITS

10. Storage of potato in pits

11. 
 Storing in bins and containers is improved by disinfecting
the bins and containers with chemical such as Formalin
before storage.
 Loose and trussed straw method is also introduced by
using synthetic substitutes to remove excess moisture
from surface layers of tubers.
 Sprouting and decay can be prevented or reduced by
spraying a combination of CIPC (chloropropahm) and
thiabendazole chloride on freshly harvested tubers.
 Can be stored upto 6 months.
TRADITIONAL
METHOD

12. Traditional methods