Durian

Duyaya (Belviz No. 901) Durian (Duyaya): Fruit and Tree Characteristics

Duyaya (Belviz No. 901) is a registered durian variety, also sold or known as Duyaya or Duyaya durian. It was registered with the National Seed Industry Council in 1999 as NSIC 1999 Dr 06. Severino Belviz bred it. Its record notes a yield of 45 to 50 fruits.

5 min read Updated October 23, 2026 By the anee.io agriculture team Read it all with Libre + Anee
Young fruit trees planted in straight rows on cleared red soil, the kind of farm where Duyaya (Belviz No. 901) durian is grown
Photo: Anish nellickal, CC BY SA 4.0, via Wikimedia Commons

The average and top yields in tonnes per hectare come from the trials each variety went through to be registered with the NSIC, and from what the seed companies say about their own seed.

What farmers harvest today can be different. Newer harvest records, the season, the place, the soil, the water and the care all move these numbers over time.

So use them to compare varieties, not as a promise for your field. Ask your seller or your agriculturist how the variety did on farms near you in the last few seasons.

If you came here looking for Duyaya or Duyaya durian, this is the same durian. Its seller and farm sources add notes, listed at the end. Compare it with the others in our durian variety finder, or see every crop variety we list. For the crop itself, read our guide: Land preparation for fruit trees.

  • Yield: a recorded yield of 45 to 50 fruits.

Key facts about Duyaya (Belviz No. 901) durian

Key facts of Duyaya (Belviz No. 901)
TraitWhat the record shows
RegistrationNSIC 1999 Dr 06
Year approved1999
Breeder or ownerSeverino Belviz
Also known asDuyaya, Duyaya durian, Belviz No. 901, NSIC Dr 06
Yield noted45 to 50 fruits
Tree height (m)6
Tree growth habitErect
Tree growth and vigorStrong, hardy
Tree fruiting seasonAugust October
Tree regularity of bearingRegular
Fruit weight (g)5071
Fruit length (cm)81.5
Fruit width (cm)74.6
Fruit shapeOblong w/ Characteristics beak at styral end
Skin colorBrown
Skin thickness (mm)18.31
Skin weight (g)3387.5
Yield, per the sellerabout 45 to 50 fruits per tree

When does it bear, and how much?

A registered tree variety is described from its mother tree, not from trial plots. The mother tree of Duyaya (Belviz No. 901) was about 6 years old and about 6 meters tall when it was registered. Its record notes a yield of 45 to 50 fruits. It bears regularly, with fruit in August October. A grafted or marcotted tree bears years sooner than one grown from seed, and its yield climbs as the tree grows.

anee.io keeps the records of each block of trees, from fertilizer to harvest, with the growth stages and weather beside them.

Is it resistant to pests and diseases?

No pest or disease ratings are published for this variety. So treat it as untested, and scout every week.

The pests and diseases that hit durian fields most often: mealybug. Our pest finder and disease finder help you name what you see.

What the fruit is like

A fruit of Duyaya (Belviz No. 901) weighs about 5071 grams, and its shape is oblong w/ characteristics beak at styral end. The flesh is bright yellow and smooth and firm. Its sweetness measured 31.69 degrees Brix, the share of sugar in the juice. Most table fruit tastes sweet from about 12 Brix up. The edible part is 30.25 percent of the fruit. Its fruiting season is August October, bearing regular.

What its seller and farm sources say

  • Harvest: Fruits August and October.
  • Yield: About 45 to 50 fruits per tree.
  • Fruit: Oblong with a beak at the tip, about 5 kg, brown, bright yellow, smooth, firm flesh, strong aroma, 31.7 Brix, about 30 percent edible.
  • Where: Davao City (Calinan).
  • Uses: Table.
  • Strong, hardy tree.

Why farmers know it: a big, very sweet Calinan durian (about 5 kg, 31.7 Brix) with a strong aroma. Check these against what farmers near you have seen, because the same variety can do differently from one town to the next.

Where and when to plant Duyaya (Belviz No. 901) durian

Davao growers plant named clones such as Puyat and Arancillo for their thick, creamy flesh and small seeds. Plant grafted trees of a known clone, and mix clones for better fruit set. A registered tree variety is a selection from one proven mother tree, and only grafted, budded or marcotted plants carry its traits. A seedling grown from its seed can turn out quite different. So buy from a nursery accredited by the Bureau of Plant Industry, and ask which mother tree the scions came from. Before planting, get the field ready with our guide: Pagtatanim ng puno.

Before you buy planting material

  • Buy grafted or budded plants from an accredited nursery, with the variety name on the tag.
  • Ask your municipal agriculturist or nearby farmers how it did in your area last season.
  • Plant a few trees first if the variety is new to your area, before you fill the whole farm.
  • Write down the planting day, inputs and harvest, so you can compare varieties on your own ground. anee.io keeps these records for you.
Plan your next durian season

Set the planting day of each lot and anee.io dates every task to harvest, with the weather beside it. Free on the Libre plan.

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Durian varieties like this one

These are the closest matches among the durian varieties we list. So if seed of this one is hard to find, compare these first.

Is Duyaya the same as Duyaya (Belviz No. 901)?
Yes. Duyaya is another name for Duyaya (Belviz No. 901), registered as NSIC 1999 Dr 06. Seed sellers use both, so ask for either one.
What is its yield?
The record shows a recorded yield of 45 to 50 fruits. Your own yield depends on the soil, water, fertilizer and pests on your farm.
Where can I buy planting material of Duyaya (Belviz No. 901)?
Buy grafted, budded or marcotted trees from a nursery accredited by the Bureau of Plant Industry, so you get the true variety. Ask your provincial agriculture office for the nearest one.

See how Duyaya (Belviz No. 901) will do on your farm

With Libre + Anee, see its full record: how it yields, its strengths and weaknesses against pests, diseases and the weather, and whether it fits your farm, your season and your soil.

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