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Pursuant
to the provisions of the Implementing Rules and Regulations of
Republic Act No. 7308, otherwise known as the Seed Industry Development
Act of 1992, Chapter III, Article II, Section 3C and Administrative
Order # 44, General Guidelines for Certification of Fruits and
Plantation Crops, the following minimum standards for mango and
Durian are to be adopted to ensure production and distribution
of high quality planting materials.
I. General Requirements for Mango and Durian.
- A. Land and Planting Guide
- Mango and durian trees for certification should be planted
in established Foundation/Scion Groves together with other species/varieties
of fruit crops
- Site must be free from any existing alternate and main host
plants of insect vector and disease up to one (1) kilometer linear
radius suitable for plant growth and good drainage.
- Minimum planting distance is 4x4 meters between hills for
foundation and scion groves. Grown trees should not overlap with
each other.
- B. Field Inspection
- Registered Parent Trees, Foundation and Scion Trees shall
be indexed at least once a year.
- The Plant Material Inspector shall inspect the foundation
and scion groves to determine the condition of the trees. Trees
will become ineligible for certification if they are found to
be infected with any transmissible disease or infested with insect
pests.
- Mango and durian seedlings in the accredited nurseries must
be inspected during asexual propagation state to determine the
authenticity of the variety being certified.
II. Specific Requirements
To attain high quality plant materials that are true-to-type
and of genetic purity, planting materials should pass morphological
and pomological evaluation to become certified as scion sources.
A. Fruit Standard for Scion Production
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PARAMETERS |
MANGO |
DURIAN |
1. Whole fruit
size
shape |
Large (250-300 g)
Oblong |
Medium (2.5-3.0 kg)
Oblong |
a) Peel
-thickness
-color at ripe stage |
Intermediate (0.9-1.5 mm)
Yellow to yellow orange |
(exc. Spine)medium(10-15mm)
green to brown |
b) Flesh
-texture
-flavor
-aroma
-fiber content
-% edible portion |
Smooth, fine and melting
Minimum of 18degree brix
Mild to moderate
None to scanty
High(>75%) |
Smooth and firm, glutinous
Minimum of 15 degree brix
Mild to strong
None to scanty
High(>75%) |
c) Seed
-size
-thickness |
Small (< 30g)
Thin (<15 mm) |
Small (< equal 20g) |
2. Tree characters
-vigor
-branching
-bearing habit
-yield |
Strong and hardy
Profuse
Regular, annual
High (more 2000 fruits/yr for 10 yr. old trees) |
Strong and hardy
Profuse
<5 yrs. (asexually propagated)
medium to high (>equal 50 fruits/yr) |
B. Seed and Seedling Standards
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PARAMETERS |
MANGO |
DURIAN |
| 1. Distance of Sowing in seedbeds |
5 cm. apart and 1-2 deep with the
concave, side down. |
4-6 cm apart and 1 cm deep right
after drying. |
| 2. Growth and vigor |
Seedling must be robust |
Seedling must be robust |
| 3. Age of seedlings for transplanting
in plastic bags/pots. |
2-3 months |
4-6 months. |
| 4. Age of rootstock seedling at
grafting time |
6-10 months |
6-8 months old |
| 5. Height of graft union |
15 cm above the ground level. |
20-40 cm above the ground level |
| 6. Stem size at grafting time |
1 cm stem diameter (minimum); measure
1" below the graft union. |
0.5-1.2 cm stem diameter, measured
3 cm above the union. |
| 7. Growth media composition |
Garden soil, fine river sand and
compost or well-decayed organic matter in equal proportion. |
Loam or compost, sand, garden soil
in equal proportion. |
| 8. Condition of the trunk and branches |
Well formed and sturdy, |
Well formed and sturdy |
| 9. Condition of the foliage |
Insect pests, diseases and mechanical
damage should not exceed 1/4 of the total foliage |
Insect pests, diseases and mechanical
damages should not exceed 1/4 of the total foliage. |
| 10. Condition of the roots |
No large roots growing out of the
container, not seriously root bound |
No excessive root bound and no tap
root coming out of the container. |
| 11. Age of the plant at transplanting |
3-8 months after grafting |
3-4 months after grafting. |
C. Scion Standards
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Mango |
Durian |
- Scion must be 6-9 month old, plump and possess large growing
points.
- Leaves at the growing points must be green to dark green
in color and crispy when crashed
- "Eye" at the growing points opened.
- Scion size must be pencil size or in compatible with the
rootstock
- Only mature shoots of the current season's growth must be
collected and kept fresh until grafting.
- The scion must be straight and free from any infection and
infestation.
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- Scion must be 203 months old, 5-6 cms., plump and active
growing points
- Leaves at the growing points must be mature, green to dark
green in color and crispy when crushed
- Scion size must be equal or smaller with the rootstock.
- Scions to be gathered must be straight and free form any
infection and infestation,
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- D. Labeling/Tagging
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- All planting materials which meet the standards for plant
material certification shall be officially tagged, identifying
the variety.
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- Each label must be properly attached to each plant with the
following necessary code/information:
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- For Parent Tree:
- NSIC Registered Code
NSQCS Code
NSIC-Mn-001-97
NSQCS-PT Code# |
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- For Foundation Tree:
NSIC-Mn-001-97
NSQCS-FT Code# |
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- For Scion Grove :
NSIC-Mn-001-97
NSQCS-SG Code# |
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- For Parent Tree:
- NSIC Registered Code
NSQCS Code
NSIC-Mn-001-97
NSQCS- Code#
Seedling # |
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- Non-compliance with the above requirements shall be a ground
for the denial of plant material certification.
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- This memorandum order shall take effect immediately upon
its approval
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-
ARTHUR C. YAP
Secretary, Department of Agriculture
Chairman, National Seed Industry Council
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- Recommending Approval:
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- CLARITO M. BARRON, CESO IV
Executive Director and
Vice Chairman, National Seed Industry Council
- February 10, 2005
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