1. IMPLIMENTATION OF CROP CALENDAR SYSTEM 2013

2. FARMING AREA of the NWP is Divided in to FIVE ZONES with the Levels of WSSV Inducing Factors

3. PRAWN FARM OPERATIONAL ZONES
NEGOMBO TO CHILAW
CHILAW TO UDAPPUWA
UDAPPUWA TO PALAVIYA
PALAVIYA TO KALPITIYA
PUTTALAM TO WANATHAWI
Negombo/Waik
Bangadeniya
Poonaip/Wattaw
Karambe
Sevantivu/Mana
Thalwilla
Kusala/Kottage
Kotantivu
Mampuri/Ethala
Annakutti/Wadat
Madampe
Wairankattuwa
Mangalaeliya
Puwarasakuda
Mee Oya
Thoduwawa/Irra
Bohawitiya
Madurank South
Kakkapalliya
Naguleliya
Madurank/Semb
Ambakkandawila
Muthupanthiya
Pulithiwayal
Marawilla/Sudu
Pinkattiya
Palaviya
Wattakalliya/Jaya
Pulichakulam
Udappuwa

4. FARMING SYSTEMS of the NWP is Divided in to THREE with the Levels of WSSV Inducing Factors

5. GRADING OF PRAWN FARMERS IN TO THREE FARMING SYSTEMS
GRADE A – CLOSED SYSTEM
GRADE B – SEMI CLOSED SYSTEM
GRADE C – OPEN SYSTEM

6. GRADE A – CLOSED SYSTEM
No water released to the Natural Water body.(Connection to the Natural water body should be closed)
Disinfection Facilities/Treated Water should be used
Reservoir/Stock Tank – 30%
Probiotic Culture to maintain water quality
Adequate Aeration Facilities
Technical Manager and Technician in the Farm site
Laboratory Facilities
BMP Specially designed for closed system should be implemented.

7. GRADE B – SEMI CLOSED SYSTEM
Limited water released to the Natural Water Body through sedimentation ponds.
Availability of Disinfection Facilities
Reservoir/Stock Tank – 10%
Probiotic Culture to maintain water quality
Adequate Aeration Facilities
Technical Manager and Technician in the Farm site.
Laboratory Facilities

8. GRADE C – OPEN SYSTEM
Farming System other than Grade A and B should be graded as Grade C.
Highly Vulnerable for diseases
Disinfection Facilities not available
No Probiotic usage
No Technician or Technical Advisors

9. PRAWN FARM STOCKING PROGRAM
PERIOD
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 5
JANUARY
FEBRUARY
HIGH RISK PERIOD
MARCH
APRIL
MAY
JUNE
RISK PERIOD
JULY
AUGUST
SEPTEMBER
OCTOBER
FAVORABLE PERIOD
NOVEMBER
DECEMBER

10. STOCKING PROGRAM
Open System Farmers should ONLY be allowed to stock within the favorable period (Green Zone of Six Months).
The Stocking Period can be maximum of one month out the SIX Months

11. STOCKING PROGRAM
Semi Closed System Farmers can be allowed to Stock during the Risk Period of Three Months (Yellow Zone) in addition to the Favorable Period (Green Zone).
The Maximum Stocking Period During the Risk Period is ONE Month out of THREE Months.

12. STOCKING PROGRAM
CLOSED SYSTEM FARMERS ARE ALLOWED TO STOCK AS SEMI CLOSED SYSTEM FARMERS But they are allowed to stock their nursery ponds early. (Maximum of 45 days prior to the recommended period)

13. STOCKING PROGRAM
NO FARMERS WILL BE ALLOWED TO STOCK DURING THE HIGH RISK PERIOD OF THREE MONTHS (RED ZONE)
(Periods shown as Favourable, Risk and High Risk periods in the above chart can be adjusted + or – 15 to 20 days towards favorable side only, depending on the Climatic and Environmental Variations in that particular sub zone. No adjustments towards risk or high risk period)

14. NEW RECOMMENDATIONS
INTRODUCTION OF THE SEVERITY INDEX FOR THE BROOD STOCK (If high severity index level of brood stock for WSSV is found in a particular area, the brood stock purchase should be prohibited)
The early stocking can be allowed for the closed system farmers with nursery facilities during the higher production of good quality post lave from the hatcheries

15. NEW RECOMMENDATIONS
All the Shrimp Farms should be advised to disinfect the pond water, when they fill the ponds for stocking of PLs.(50 to 100 Kg Bleaching powder per one acre pond)
The water release to the natural system should not be allowed until 45 days.
The animals can be checked for WSSV between 30 to 45 days.
They can fill the water to compensate for the evaporation loss.
The probiotic usage should be promoted to maintain the water quality in the ponds.

16. NEW RECOMMENDATIONS
The PCR tests should be carried out to confirm that the ponds are free from WSSV infections between 30 to 45 days.
If positive results for WSSV detected, the ponds should be sealed and animals should be destroyed and buried or burnt.
If the pond sample is found negative, the farms can be allowed to do water exchanges after 45days.
This procedure will help to prevent the vertical Transmission and the main source of infections of WSSV in the Farming System.

17. NWP - ZONAL INFORMATION SUMMARY FOR ONE CROP
AREA
NO OF FARMS
NO OF PONDS
PL REQD/CORP ( Millions )
PRODN/CROP ( MT )
ZONE 1 72
339
24.5
278.0
ZONE 2
299
1212
89.5
1480.0
ZONE 3
136
533
44.0
630.0
ZONE 4 28
190
12.0
100.0
ZONE 5 61
403
690.0
TOTAL
596
2677
214.0
3178.0

18. NWP - ZONAL INFORMATION FOR ONE YEAR
PERIOD
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 5
PL'S (Mn)
PRODN (MT)
JANUARY 30
300
FEBRUARY 40
450
MARCH 35
400
APRIL 10
550
MAY 20
JUNE
650
JULY 15
AUGUST
350
SEPTEMBER 14
OCTOBER 25
NOVEMBER 43
250
DECEMBER 38
100
TOTAL
4600

19. THANK YOU