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Exciting period thrips pressure in onions
On many fields of seed onions we see considerable pressure from thrips in the crop. Due to cooler weather conditions, timely spraying and the fact that the onions are growing well on most plots, the damage seems to be manageable so far. With a warm week ahead, it is important to be on top of it now.
As long as foliage growth is an issue, Batavia continue to give the unique effect on larvae of thrips. After all, after absorption, the agent must be transported via the sap flow of the crop to the growing point, where most larvae are hiding. We have now reached the point where there is hardly any new foliage growth on the early seed onions plots. Consider using another local-systemic agent if thrips pressure is present.
Advice until the end of foliage formation:
- 0,75 l/ha Batavia + 2 l/ha Robbester
- Do not mix with wetting agents or other agents
- Spray at least 300 l/ha during good shooting conditions
Many grain fields are ripening and grass seed is being harvested. This means that other thrips species – which normally do not live in onions – can fly into the crop. These thrips species do not lay eggs, but can cause a lot of scraping and suction damage due to the enormous numbers. In that case, use a contact device. It is very important to actually hit the pest insect. So spray with plenty of water and keep the driving speed limited.
Advice contact means:
- 4 - 5 l/ha Pinball in >600 l/ha water
- Do not mix with other agents
- The hardness of the aerated water used must be below 16,8 ° German hardness (dH)!
- Flipper is highly selective and therefore safe for beneficial insects present
of
- 0,3 l / ha You decide + wetting agent in 500 l/ha of water
- Decis is not selective for beneficial insects
Apply contact agents when the thrips is most active. This is especially the case in dark weather, so late in the evening or early in the morning.
