PB 235 Rubber (NSIC Rb 02): Characteristics
PB 235 is a registered rubber variety, also sold or known as NSIC Rb 02. It was registered with the National Seed Industry Council in 1999 as NSIC 1999 Rb 02. Prang Besar bred it.
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 NSIC Rb 02, this is the same rubber. Its seller and farm sources add notes, listed at the end. Compare it with the others in our rubber variety finder, or see every crop variety we list. For the crop itself, read our guide: Land preparation for tree crops.
Key facts about PB 235 rubber
| Trait | What the record shows |
|---|---|
| Registration | NSIC 1999 Rb 02 |
| Year approved | 1999 |
| Breeder or owner | Prang Besar |
| Also known as | NSIC Rb 02 |
| Tree growth habit | Clear, Straight |
| Tree growth vigor | Strong |
| Latex dry rubber content (percent) | 37.7 |
| Latex color | Pale Yellow |
| Distinguishing characteristics | Abiity to self prune fairly, closed canopy |
| Yield, per the seller | about 2,240 to 2,530 kg/ha/yr on virgin bark |
When does it bear, and how much?
A registered tree variety is described from its mother tree, not from trial plots. 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?
| Pest or disease | Rating | What it means |
|---|---|---|
| percent wind damage | 2.3E 2 | As noted in the record |
| Brown bast incidence | 5.8000000000000003E 2 | As noted in the record |
| Odium reaction | Light | As noted in the record |
| Collectrichium reaction | Light | As noted in the record |
| Black strip reaction | 2 to 1 to 5 Disease strip | As noted in the record |
| Mouldy rot reaction | 1 to 25 percent tapping cut with veerosis | As noted in the record |
| Pink diseases | Light | As noted in the record |
The pests and diseases that hit rubber fields most often: anthracnose, mealybug, powdery mildew. Our pest finder and disease finder help you name what you see.
What its seller and farm sources say
- Yield: About 2,240 to 2,530 kg/ha/yr on virgin bark.
- Fruit: Pale yellow latex, dry rubber content about 37.7 percent.
- Uses: Latex, cup lump.
- High response to stimulation.
- Light Oidium and Colletotrichum, about 5.8 percent brown bast.
Why farmers know it: straight, vigorous Prang Besar clone that self prunes and forms a closed canopy. 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 PB 235 rubber
Rubber clones differ in latex yield and in how they take tapping and wind. Plant budded clones from an accredited nursery. 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: Land preparation in the Philippines.
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.
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.
Start freeRubber varieties like this one
These are the closest matches among the rubber varieties we list. So if seed of this one is hard to find, compare these first.
Is NSIC Rb 02 the same as PB 235?
Where can I buy planting material of PB 235?
See how PB 235 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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