Potato : Solanum tuberosum L.

Potato (Solanum tuberosum L.) originated in Andes highlands in Peru and Europeans who settled in hilly areas introduced it to Sri Lanka in 1850's. At present potato is extensively cultivated in the district of Nuwara Eliya (Up country wet zone >1000m amsl) in two major seasons, "Yala" (Feb - July) and "Maha" (Aug - Dec.) where annual rainfall is >2,500mm and temperature ranges between 10-150C with the relative humidity of 80%. It also widely grown in Badulla District (Up Country intermediate zone- 1000 to 1500 m msl) in paddy fields and high land during "Yala' and "Maha" seasons respectively. This area experiences the rainfall of 1500 - 2250 mm annually with 70 % RH and 15- 22 0C range in temperature. Puttlam and Jaffna are the other two districts where the potato is grown in lesser extent.

Potato is the most popular crop of upcountry farmers due to its high net return.

Recommended Varieties

       

Hillstar

Desiree

Sante

raja

       

Granola

Kondor

Isna

 


  1. a) Potato-Recommended varieties in Sri Lanka

1.

Name of the Variety:

Sita

2. 

Scientists Involved: 

Dr. Yogarathnum and
Mrs. Velupillai

3. 

Year of release:

1981

4.

Age of Optimum Harvesting time:

Late - 100- 110 days

5.


Pedigree:

Advanced generation line from
(I-1085, India) CIP

6.

Pests and Disease Resistance:

Tolerance to late blight

7. 

Crop Description)

 

a) Plant:

Anthocyanin discoloration is absent; green color leaves with many secondary leaflets. Leaflets are very small and rough.

 

b) Flower:

White.

 

c) Tuber :

Short oval shape; yellow skin; white flesh; shallow eyes.

 

d) Sprout :

Green sprouts with weak pubescence.

 

:e) Potential Yield:

20 - 25 t/ha

 

1.

Name of the Variety:

Krushi

2. 

Scientists Involved : 

Dr. Yogarathnum and Mrs. Velupillai

3.

Year of release

1981

4.

Age of  optimum

Harvesting time:

Late - 100 - 110 days

5.

Pedigree:

Advanced generation line from (I-822, India) CIP

6.

Pests and Disease Resistance: 

Tolerance to late blight

7.

Crop Description: 

 

a) Plant:

Anthocyanin discoloration absent at the top of the stem and present at the stem base; dark green leaves with medium number of secondary leaflets.

 


b) Flower

white

 

c) Tuber :

Round oval shape; yellow skin; white yellow flesh; medium depth eyes.

 

d) Sprout:

Color of the base red violet, tip light red violet; weak pubescence at the base and medium at the tip.

 

e) Potential Yield:

20 t/ha

 

1.

Name of the Variety:  


Lukshmi

2.

Scientists Involved:

Mr. Abethunge and Mrs.S. Abethunge

3.

Year of release

1992

4.

Age of Optimum Harvesting time

Late (110 days)

5. 

Pedigree:

SE-11 x 260/39B

6.

Pests and Disease Resistance:  

Moderately resistance to late blight

7. 

Crop Description

 
 

a) Plant:

Long stems

 

b) Flower

White pink

 

c) Tuber:

Round to oval shape, white skin with shallow eyes

 

d) Sprout 

 
 

e) Potential Yield: 

20 -25

 

Name of the Variety

Manike

2

Scientists Involved:

Mr. Abethunge and Mrs.Abethunge

3

Year of release:

1992

4

Age of Optimum Harvesting time.

Late (110 days)

5

Pedigree

Atzimba x 260/39B

Pests and Disease Resistance:

Moderately resistance to late blight

7

Crop Description

 
 

a) Plant:

Long stems

 

b) Flower

White pink

 

c) Tuber

Round to oval shape, white skin with shallow eyes.

 

d) Sprout

 
 

e) Potential Yield: 

20 -25 t/h


  1. b) Potato-commercial varieties

1.

Name of the Variety: 

Desiree

2.

Scientists Involved


-

3. 

year of release   

-

4.

Age of Optimum Harvesting time 

Moderately early to moderately late

5. 

Pedigree: 

Urgenta x Desesche

6.

Pests and Disease Resistance:

Good resistance to tuber blight

7. 

Crop Description

 
 

a) Plant

Tall to medium, semi-erect stems, pronounce anthocyanin discoloration, dark green leaves

   

Red-violet flowers.

 

b) Flower

 
 

c) Tuber 

Long -oval shape, red smooth skin, pale yellow flesh, shallow eyes

 

d) Sprout

Large, broad cylindrical, intense to moderately intense red-violet and medium pubescence, many root tips, moderate to weak anthocyanin discoloration.

 

e) Potential Yield

15-20mt/h

 

1. 

Name of the Variety

Granola

2.

Scientists Involved:    -

 

3.

Age of Optimum Harvesting time.

Medium late

4. 

Pedigree

3333/60 x 267.04

5. 

Pests and Disease Resistance    Fairly good resistance to leaf blight. Moderate resistance to viruses A and Yn; resistance to pathotype A of the golden nematode.

 

6.

Crop Description 

 
 

a) Plant Medium-length to tall; stems fairly thick, fairly spreading, pale purple; Leaves large, palish green; primary leaflets fairly large and narrow with fairly shallow veins;

 
 

b) Flower

Darkish red - purple flowers.

 

c) Tuber

Short - oval; yellow, fairly rough skin; yellow flesh; fairly deep eyes.

 

d) Sprout

Fairly small, egg- shaped, red-purple; sparsely hairy; fairly large, open, deep red- purple terminal buds; fairly small number of root tips.

 

e) Potential Yield

20 -25 t/ha

 

1.

Name of the Variety

Kondor

2.

Scientists  Involved:   

-

3.

Age of Optimum Harvesting time.

Moderately early to moderately late.

4. 

Pedigree

KO61-333 x Wilja

5.

Pests and Disease Resistance

Moderately good resistance to leaf blight, rather good resistance to tuber blight; rather good resistance to virus X and resistance to virus A.

6.

Crop Description

 
 

a)  Plant

Medium to short; stems semi erect to erect, pronounced to moderate anthocyanin discoloration; large to medium, dark green leaves.

 

b) Flower

Red-violet flowers

 

c) Tuber

Very large, oval, red skin, moderately deep eyes; pale yellow flesh,

 

d) Sprout

Large to medium, broad cylindrical, intense red-violet and strong pubescence; medium terminal bud with moderate to weak anthocyanin discoloration; few root tips.

 

e) Potential

Yield    20 - 25 t/ha

 

1.

Name of the Variety 

Isna

2.

Scientists Involved:

-

3.

Age of Optimum Harvesting time.

Moderately Late

4.

Pedigree

35/53/4718 x M.P.I. 44.335/128

5.

Pests and Disease Resistance

 

6.

Crop Description

 
 

a) Plant

No anthosyanin discoloration; large to medium, green leaves

 

b) Flower

White colour

 

c) Tuber

Short oval; yellow skin, yellow flesh; rather shallow eyes.

 

d) Sprout

Purplish green base with green tip; weak pubescence at the base and medium at the tip

 

e) Potential yield

20t/ha



Field Establishment


Agro Climatic requirements

Potato can be successfully grown in Up Country Wet, Intermediate, and Dry Zones at temperatures between 24 0C and 32 0C as well as in Puttalum and Jaffna districts during Maha. The optimum day temperature is 20 - 25 0C and temperature difference between day and night should be 10 0C

 

Time of planting

Season

Location

Planting date

Maha 

Nuwara Eliya
Badulla (highlands)
Jaffna & Puttlum
Kalpitiya

Aug - September Nov - Dec
mid Nov - mid Dec mid Oct - mid Dec

Yala

Nuwara Eliya
Badulla

Feb - March
July - Aug