'Checking for insects in beets continues to be an issue'

Aphids and beet flies are still found in abundance. This season, a lot of attention has already been paid to insects in beets. Many people are already aware of the damage caused by beetroot beetles.

However, this year we are also dealing with black bean aphids, which were found on the beet seedlings early in the season and which led to heavy infestations. In addition, we also saw that the flea beetles were present in large numbers. The spraying with herbicides sometimes showed considerable damage.

At an early stage, agents such as Calypso and Bariard were also used to combat the insects. However, the duration of action of the agents is often no more than 14 days. This sometimes necessitated re-treatment. In short: the lack of insecticide coating on beet seed is becoming increasingly clear. Also see the poster with harmful insects in beets.

Green peach aphid and beet fly
Despite the recent rainfall, plenty of beet flies and green peach aphids are currently being found. The population of green peach aphids, which transmit the beet yellowing virus, is building up quickly and is above the damage threshold in more and more places. The impact of the virus is difficult to estimate. Eggs are still found in the well-known beet flying areas.

At our test center in Lelystad (Flevoland) an infestation of black bean aphids could be seen early on. Eggs of the beet fly have also been found and the population structure of the green peach aphid is still continuing in the untreated fields. During the visit days to our test platform (24 June to 5 July), tackling insects in sugar beet will therefore be an important and interesting theme.

Additional options for insect control
Batavia has been granted an exemption in beets. This exemption applies until Monday 29 July. Batavia (spirotetramat) is a systemic insecticide. The active substance is absorbed into the plant and transported upwards and downwards throughout the plant. Batavia mainly fights young sucking insects. Batavia works in beets against aphids (including green peach aphid and black bean aphid) and thrips. The degree of activity against the beet fly larvae should become clear this season.

An active growth is important for proper functioning. Batavia (dosage 0,75 liters per hectare) may be applied to the beets twice per growing season, with an interval of 2 days. To improve absorption, it is recommended to always add 14 liters per hectare of Robbester. Use at least 2 liters of water per hectare. Batavia also fits in well with IPM, with a very favorable consumption and environmental profile.

In the table below you will find the options for controlling various insects. Always read the label before spraying. Number of applications, conditions and total amount per hectare varies per product.

Increase
At the moment we are still seeing an increase in the black bean aphid, green peach aphid and beet flies. Therefore, keep checking carefully and take action when the damage threshold is exceeded.

Pirimor is a registered trademark of Adama BV Tepekki is a registered trademark of ISK Biosciences Europe BV

This business case is powered by: