Drainage Canals and Retention Canal
- Remove excess water
- Minimizes disease spread
- Reduces surface water run-off
- Reduces underground water
- Let water penetrate the soil
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Pruning
Advantages
- Improves air circulationt thus decreasing relative humidity
- Removing low lying branches will help prevent the disease (decreases splashing)
What to Prune?
- Dead and diseased branches
- Branches 1.5m from the ground
- Water sprouts
- Branches that come too near to each other
- Branches within the canopy less than 2 cm in diameter
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 Always paint the pruned parts to avoid disease and pest entry point |
Trunk Sanitation
Weeding
- Manual - Sanggot, Likong, etc.
- Mechanical - Grass cutter, mower, etc.
Advantages
- Eliminates microclimate that induce phytopthora
- Eliminates weeds that compete against the durian
- Eliminates hiding place for durian thieves, giving you clear view of the while area
Balance Fertilization
Crop Removal
- For every 1000 lbs of fruit harvested in durian, 1.4 lbs of nitrogen, 0.34 lb of phosphorous, 4 lbs of potassium, 0.30 lb of calcium, and 0.47 lb of magnesium removed.
- If possible, do soil and tissue analysis at your farm to determine nutrient deficiencies at your area.
Fruit and Flower Thinning
What to thin?
- Misshapen fruits
- Borer laden fruits
- Fruits found on weak branches
- Fruit clustered from a single peduncle
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Ideal number of fruits per tree depending on the age of the tree
- Tree Age (Year) = Ideal no. of Fruits
- 4 = 0-3
- 5 = 5-15
- 6 = 20-40
Proppping - to prevent breakage and damage of fruits and branches
Pest and Disease Control
Insect Pest
- Fruit borer
- Psyllids
- Mealybugs
- Durian hopper
- Ambrosia beetle
Chemical Control of Insect Pests
- Karate, Bida, Kriss, etc. (Lambdacyhalothrin)
- Cypermithrin
- Decis, Detour, Decide (Deltamethrin)
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Phytopthora Disease
Preventive
- Mancozeb
- Copper fungicides
Monitoring
- Wider spacing
- Proper pruning
- Trunk sanitation
- Restrict grazing animals
- Proper disposal of infected parts
- USe of tolerant/resistant cultivars
- Fruit thinning
- Adequate drainage canals
- Adequate fertilization
- Adequate irrigation
Harvesting
Indices
- Hollow sound
- Flexible spine
- Distinct aroma
- Distinct abscission layer
- 95-120 days from flower drop, depending on the cultivar
Fencing and Security
- Pilferage is one of the factors that contribute to loses in durian production.
author: Severino C. Belbiz, Dept. of Agriculture
See also: Growing Durian
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