What should I watch for in zucchini, pests or diseases?
3 Answers
The big issues in zucchini are sucking pests and virus. Whitefly and aphids spread mosaic and yellowing viruses that can ruin a crop, and you also get fruit fly, red pumpkin beetle and powdery mildew on the leaves. Manage by controlling whitefly early, using yellow sticky traps, removing virus-infected plants, and treating powdery mildew with recommended fungicides following the label and pre harvest interval. Poor fruit set in early flowers is also common until bees become active, so do not panic over the first few flowers. Confirm specific chemicals and doses with your KVK for your area.
Powdery mildew is what ends my crop. I start preventive sprays before it gets bad and remove the worst lower leaves to keep air moving.
Virus from whitefly hit me hard one summer. Now I grow in the cooler spring window and pull out infected plants quickly so it does not spread.