Onions Pest & Disease Programs — Biological Inputs That Fit Your Spray Window
Natural program for bulb onions — the mildew and leaf-blotch complex through bulbing, basal rot in the root plate, and the calcium and potassium behind storage quality.
Growing onions with Vegalab
Onions are a long-season crop harvested to a storage standard, which means late-season disease and late-season nutrition both show up months after the field work is done. Downy mildew and powdery mildew take leaf area during bulbing; gray mould drives purple blotch and neck rot into storage; fusarium basal rot and damping-off work at the root plate. Thrips pressure is heavy in most growing regions and is the main scouting priority through the season.
Vegalab's Spore Control and Mildew Control cover the mildew, botrytis and blotch complex, applied preventatively ahead of favourable weather and rotated through the bulbing period. Calcium Boost and Potassium Pro support bulb firmness, skin quality and storage life, and Charge BioBoost supports root-zone nutrition in the shallow, fibrous onion root system. Zero pre-harvest interval and zero re-entry mean the program can run to lifting without a residue-driven cut-off. Rates follow the registered label.
Vegalab onions program
| Vegalab product | Target (pest / disease) | Rate | PHI / REI |
|---|---|---|---|
| Spore Control | Purple blotch, botrytis neck rot, downy mildew, damping-off | Foliar, per label | 0 / 0 |
| Mildew Control | Downy and powdery mildew — rotation partner through bulbing | Foliar, per label | 0 / 0 |
| Calcium Boost | Bulb firmness, skin quality and storage life | Foliar, per label | 0 / 0 |
| Potassium Pro | Potassium demand through bulb sizing | Fertigation or foliar, per label | 0 / 0 |
| Micro Boost | Chelated micronutrient support across the season | Foliar, per label | 0 / 0 |
| Charge BioBoost | Root-zone nutrition in the shallow onion root system | 1 lb/ac soil drench | 0 / 0 |
Rates shown are use-guidance; confirm against the current registered label for your market.
Recommended products for onions
Frequently asked questions
What controls downy mildew in onions naturally?
Mildew Control and Spore Control are applied preventatively and in rotation ahead of weather favourable to downy mildew, both with zero pre-harvest interval and zero re-entry.
Can Vegalab improve onion storage quality?
Calcium Boost and Potassium Pro support bulb firmness, skin quality and storage life. These are nutritional inputs — they support crop quality rather than treating a storage disease.
How do I get a Vegalab program for onions?
Contact Vegalab for a crop-specific recommendation, rates and local distributor information.