Cabbage seed weevil

Adult

The beetle is black, with white scales.

Damage

• The larvae gnaw young seeds from the outside or eat them out; during its development one larva eats several seeds wholly or partly. From the outside, infested pods look almost the same as healthy ones.
• The beetles gnaw small pits in the stems, flower stalks and buds.

When to look

On winter oilseed rape the pest develops on plants and inflorescences from budding to the start of flowering.

No rate and no spray timing here: both come from the label and the register.

Agronomy

• Destroy weeds, as they often become foci where the pest breeds and builds up.
• Loosen the soil on plots with seed plants during the period when the seed weevil pupates.
• Follow a proper crop rotation. Place seed plants away from fields where they were grown in previous years.

Every fact rests on a quote from its source, and each quote was checked against the page it is printed on.

1. Зайцева І. А., «Сільськогосподарська ентомологія. Курс лекцій», навчальний посібник, 237 с. · Дніпровський державний аграрно-економічний університет, Дніпро, 2021 · p. 156, 157
2. EPPO Global Database · European and Mediterranean Plant Protection Organization
3. Прогноз фітосанітарного стану агроценозів України та рекомендації щодо захисту рослин у 2025 році · Держпродспоживслужба, НААН, НАН · p. 123
4. Photos: Janet Graham, Wikimedia Commons, CC BY 2.0 · Paul Cook, iNaturalist, CC BY 4.0