Flea beetle
Phyllotreta
This description was machine-translated.
How to spot it
Flea beetles are tiny, black or metallic shiny beetles that jump away when touched.
They punch countless small round holes in young leaves of Radieschen, Rucola and Rettich in dry-warm weather, making the leaves look like sieved.
Seedlings can die completely under heavy infestation, while older plants usually tolerate the bite.
Prevention
Keep the soil around seedlings moist with regular watering and a thin mulch layer, flea beetles avoid moisture and cool soil.
A fine-meshed protective net directly after sowing keeps the jumping beetles completely away.
Loose, frequent hoeing disrupts egg laying, and a slightly later or earlier sowing avoids the dry-hot main flight periods.
Affected plants
These plants in our database are especially susceptible.
Asian salad
Brassica rapa var. japonica
Chinese cabbage
Brassica rapa subsp. pekinensis
Kohlrabi
Brassica oleracea var. gongylodes
Mustard greens
Brassica juncea
Radish
Raphanus sativus var. longipinnatus
Radish
Raphanus sativus var. sativus
Rocket
Eruca vesicaria
broccoli
Brassica oleracea var. italica
cauliflower
Brassica oleracea var. botrytis
oil radish
Raphanus sativus var. oleiformis
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