Everything for horticulture Personal advice from our specialists Worldwide delivery of 30 000 products
Search your products below, and request a quote within 30 seconds
Shop   Knowledge center   Crop protection and disinfection   Tips for increased effectiveness of Aphidoletes 

Tips for increased effectiveness of Aphidoletes aphidimyza in the winter

Written by Kevin van Kester | Last update: 31-12-2020

Aphidoletes aphidimyza is a gall-midge
 whose larvae feed on more than 70 aphid species, including the green peach aphid. In winter, it is more difficult to achieve good results with this biological crop protection agent. This is due to the cold weather often combined with the beginning of the new crop. Taking a number of points into account, you can increase the effectiveness of Aphidoletes aphidimyza during the winter. Our specialist has listed a number of tips. 

Spider webs to support the mating of Aphidoletes

When starting a crop there are generally few spiders present in the greenhouse, spiderwebs facilitate the Aphidoletes aphidimyza adults to mate If the Aphidoteles can't find a web there will possibly be less mating resulting in fewer egg deposits.  The solution is to apply a spider web yourself on the bucket in which they are deployed or to apply spiders in the crop.  


Aphidoletes aphidimyza is active at night and sets its eggs at a minimum temperature of 12°C. The higher the temperature the better the egg deposits. During the daytime larvae develop best at a temperature of around 23°C.

When a plant is attacked by aphids it secretes chemical signals that attract natural enemies of the aphid. These signal substances are better dispersed through the greenhouse in warm air. At a lower temperature Aphidoletes has much more difficulty in detecting aphids and locating their prey.  

Air humidity 

The humidity in this period of the year is generally low due to a young and open crop meaning dewdrops are present in the crop to a lesser extent. These dewdrops are essential for hatching gall midges because they drink from them. If the gall midges do not drink they can die within a few hours. Solution: Place a wet cloth in a bucket or place a piece of moist floral foam with 10% sugar water in the place where you introduce the material. 

Air humidity is also important for egg deposits. Aphidoletes aphidimyza prefers the leaves at the bottom of the plant because the conditions are the most moist and dark here.

Related products

Foil and soil temperature 

In many new crops foil is placed on the ground for hygiene reasons. However, this has a negative impact on the development of Aphidoletes aphidimyza. The larvae can only pupate in the ground. If the larvae end up on the foil and cannot reach the ground they will die. As a grower you can do little about this but be aware of it. Soil temperature is also low during this period of the year. Keep in mind that the pupation process takes longer, so it takes longer for a new generation of gall midges to emerge.


The final point of attention is not related to the weather but is therefore no less important: disperse the material. APHIDOcontrol from the supplier Agrobio is supplied in bottles with vermiculite as a carrier. For some products, you only have to turn the cap of the bottle and then put it in the crop but with APHIDOcontrol this is not the case. This material must be scattered. If you don't do that some of the gall midges won't get through the vermiculite and will therefore stay behind in the bottle. 

Questions about the effectiveness of Aphidoletes in the winter

Do you have questions about the effectiveness and use of Aphidoletes in the winter or would you like tailor-made advice? Then contact Quality Controller Kevin van Kester or ask your question using the form below. We'll respond within 24 hours on working days.

Contact form

Kevin KesterAbout Kevin van Kester

Kevin van Kester, specialist in the area of quality management of biological pesticides, has been working with Royal Brinkman since 2013. On the basis of IOBC-guidelines, he structurally monitors the quality of organic products of various producers throughout Europe. "My motivation consists of contributing to higher efficiency of the biological pest control, as such, due to which fewer chemical treatments are required."

Do not delete this link