
Squash Pest & Disease Programs - Biological Inputs That Fit Your Spray Window
Set and mildew program for squash and cucurbits: Pollen Boost for fruit set, Mildew Control and Spore Control for powdery and downy mildew.
Growing squash with Vegalab
Squash and other cucurbits drop many flowers when set fails, and they're prime targets for powdery and downy mildew.
Vegalab supports fruit set with Pollen Boost and protects the canopy with Mildew Control and Spore Control. Rates follow the registered label.
Cucurbits give two separate openings and both are short. Fruit set fails flower by flower, so support has to run through flowering rather than land on one date. Powdery and downy mildew then move through a dense canopy quickly once humidity holds, and coverage is the limiting factor - these are contact products, so the underside of the leaf matters as much as the top, and a spray that only wets the upper canopy leaves the mildew where it starts. Both Mildew Control and Spore Control carry zero pre-harvest interval, which matters on a crop picked repeatedly over weeks.
Vegalab squash program
| Vegalab product | Target (pest / disease) | Rate | PHI / REI |
|---|---|---|---|
| Pollen Boost | Flower quality & fruit set | Foliar through flowering, per label | 0 / 0 |
| Mildew Control | Powdery & downy mildew | Foliar, per label | 0 / 0 |
| Spore Control | Broader cucurbit disease pressure | Foliar, per label | 0 / 0 |
Recommended products for squash







Frequently asked questions
Why do small squash fruit shrivel and drop?
That's failed set · the fruit wasn't pollinated; supporting flower quality and pollinator activity reduces drop.
Can I use the mildew program in a squash field or tunnel?
Yes · Mildew Control and Spore Control suit field and protected culture; pair with airflow and humidity management.
Pests & diseases affecting Squash
Identify a problem
Crop-specific programs
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