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How to use sticky traps, detect insects and monitor pest control in greenhouses?

trap pests
Written by Jan-Paul de Wit | Last update 25-01-2023

Insect detection in a crop is of great importance, because the sooner a pest is detected, the sooner you can start controlling the pest. By monitoring the development of pest by sticky traps, you can see whether the chosen pest control strategy is the right one, or whether it needs to be adjusted. There are various sticky insect traps for detecting and removing pests, including sticky trap sheets and sticky trap rolls or tape. In this article, our specialists provide tips for the optimal use of these sticky insect traps. 

Insect detection | Tips

Insects are best tracked by using sticky traps. Read additional information about sticky traps here; 
  • Sticky traps sheets and rolls are available in the colours yellow and blue. It is important that you choose the right colour. The colour 'yellow' has a greater attraction on aphids, leafminers, white flies, fungus flies and thrips, while the colour 'blue' is used to signal and catch thrips in particular.
  • Sticky trap sheets are available with different types of glue or adhesive: dry glue and wet glue. For signaling and detecting purposes, the dry variant is usually used. Because counting is only possible if the insects are attached separately from each other, a thin/dry adhesive layer is used. If an insect is stuck to the signal roller, then that spot is 'full' and no other insect can get stuck there. Signal plates with wet glue are mainly used to catch pests. Because of the thicker adhesive layer the insect 'drowns' as it were and the adhesive runs over it, so that insects can be caught again at the same spot. This makes these products more suitable for longer use. Note: products with wet glue are less or not suitable for export, because the glue can run off the board due to high temperatures during transport. 
  • If you have purchased sticky trap rolls or trap sheets but do not yet intend to use them, then make sure that you store them in a dry and cool place. This will help preserve the quality of the adhesive. 
  • Contact a crop protection expert as soon as you detect pests in your crops. They can advise you on the best plan of action.

How to use sticky trap rolls | Tips

It is important to have trap rolls in your greenhouse. Here is a guide to using sticky traps; 
  • In addition to different colours, sticky trap rolls are available in different types:
    - Standard signal roller: the adhesive layer of this type of signal roller is dry and has a powerful adhesive power. This type of signal roller is provided with Royal Brinkman label and printing and can be used for an entire growing season. The signal rolls are available in lengths varying from 80 to 130 meters and in widths of 5 cm, 10 cm, 15 cm and 30 cm. The best width to use depends on the crop. In tomato cultivation, signal rollers of 15 centimeters are used in most cases, but at a lower pest pressure you can opt for rolls of 10 centimeters in order to have less light loss. Rolls of 30 centimeters are the least used, but can sometimes be used in hotspots to massively capture pests. 
    - Signal roller with thrips pheromone: this signal roller has an extra attracting effect on both male and female thrips because of the printed pattern on the roller and the processed attractant in the glue. The signal roller can be used in both vegetables and ornamental plants. The signal rollers have a powerful and user-friendly adhesive on both sides. This type of glue does not stick to the fingers, but it does ensure that it holds the captured insects very well.
  • The signal rollers must be correctly rolled out and attached. The use of a ribbon brace helps you to hang the roll in a correct position in relation to the crop. There are different types of sticky trap ribbon and fixing ways. 
  • In ornamental plants, you can use signal rollers all year round. In vegetable crops it is best to place the signal rollers immediately after planting a new crop during the crop rotation, or in the period shortly thereafter. For both situations: place one signal roller per two or three caps. In tomato cultivation we advise you to preventively hang one ribbon per trellis and in case of an increase in hot spots one ribbon per row.

How to use sticky trap sheets | tips

The sticky trap roll is not the only type of sticky trap available. Sticky traps are also available. However, there is a difference between the two; 
  • There are also different types available for sticky traps. The most important difference between these types is the type of adhesive: wet or dry. In addition, sticky traps are available in different sizes: 10 by 25cm and 40 by 25cm. 
  • To make it easier to register, grids have been installed on the sticky trap sheets. With a high pest population, it is then simpler to install the grids on the trusses.
  • To hang the sticky traps, there are plate holders. For signaling purposes, the sticky trap holder magnet is used for mounting on the leg. To catch masses, for example in a chrysanthemum crop, one chooses to mount on the truss.

Related products

  • Video

    In the videos on the right you can see two different ways of attaching a sticky trap sheet.

More information

If you have questions about pest detection or if you require tailor-made advice, please contact one of our crop protection experts or use the form below to submit your question. We'll respond within 24 hours on working days.

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Jan-PaulAbout Jan-Paul de Wit

Jan-Paul de Wit is specialist in Integrated Pest Management. He helps and advices growers on how to improve their crops and how to fight diseases, viruses and pests. He advises on the best products to use so that they optimally match the objectives of the grower, as well as the crop, greenhouse and environment.

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