The beet moth [Scrobipalpa ocellatella (Boyd, 1858)] was detected on several sites in Poland, (voivodships: dolnoślaskie – Lower Silesia and wielkopolskie – Grat Poland), in September and October 2019. Beet damage in Lower Silesia was very significant, most of the plants had visible traces of secondary infections and at least a few larvae fed on each plant. In Great Poland (Winna Góra), about 15% of sugar beet plants were infected with Beet moth, but at a much lower intensity than in the south-western part of the country. The caterpillars can be seen by bending or breaking the youngest beet leaves.
Samples of infected plants were collected on the infected fields. Under laboratory conditions, adult pests were grown. Photographic documentation was also prepared.
Beet moth is currently one of the most important sugar beet pests in Western and Southern Europe, North Africa, the Middle East and some Asian countries (Pakistan, Syria, China, Iraq and Iran). The caterpillars of the Beet moth cause quantitative and qualitative losses in the root yield at the end of the vegetation period. Secondary infections cause a decrease in sugar content, often by more than 50% in roots. Infected roots also have a higher glucose, potassium and sodium content than non-infected plants. Inhabited roots are practically unsuitable for storage, as infections are still progressing and even getting worse in the prisms.