ProfessionalTips: Natural Insect Protection in Amusement Parks

(eap) Summer is the season when parks welcome the highest number of guests and generate the majority of revenues. Yet, the enjoyment of visitors is often disturbed by insects such as mosquitoes, flies, wasps, ticks or even oak processionary moths. These insects can not only be unpleasant and harmful to food and beverage operations, but also pose health risks. Wasp stings burden staff teams and increase first-aid statistics; allergic reactions with complications may occur. Infestations of oak processionary moths can require large areas to be cordoned off until complete and costly removal has been carried out, with the authorities needing to be involved. Ticks can transmit Lyme disease in some regions, causing long-term staff absences and even guest claims for compensation.

Duftender Lavendel schafft eine natürliche Barriere gegen Plagegeister. / Foto: Mona Hamm Werner and Angelique Nowotny have combined their expertise in park operations and floristry to address this important subject in detail. “From my experience in various operational areas of the leisure industry over the past 30 years, I know how problematic wasps, for example, can be. In this case,” says Werner Nowotny, “I rely on as much natural control as necessary and as little chemistry as possible.” His wife Angelique shares this view: “Fortunately, there is a wide range of flowers, plants, and technical means that can naturally help to keep harmful insects away,” says the trained florist. The experts have explored in detail which plants are particularly effective in this context and illustrate their findings with several examples.

Lavender (Lavandula angustifolia)

Lavender is not only attractive and pleasantly fragrant, but also proves to be a real wonder plant. With its essential oils, lavender has a strong repellent effect on certain insects – including ticks, mosquitoes, and even wasps. Planting lavender in beds or pots near seating areas creates a natural barrier against pests.

Rosmarin ist nicht nur in der Küche, sondern auch am Wegesrand hilfreich. / Foto: Lisa Forkner Rosemary (Rosmarinus officinalis)

Rosemary is another versatile plant that can be used both in the kitchen and in flower beds. The strong essential oils of rosemary repel ticks, mosquitoes, flies, and wasps. Planted near seating areas, playgrounds or F&B terraces, this herb unfolds its particular effect. “Rosemary also grows well in pots,” notes Angelique Nowotny, recommending their use as mobile plantings, e.g. to line pathways.

Ob im Kübel oder im Beet, Basilikum mögen u.a. Wespen überhaupt nicht. / Foto: Susie Burleson

Basil (Ocimum basilicum)

Basil is another herb that is not only highly valued in the kitchen, but also disliked by wasps and mosquitoes because of its intense aroma, released at the lightest touch. Various basil varieties are effective, which is why the florist recommends planting it generously in pots and/or garden beds.

The Aroma Mix

There is a wide range of other plants that can repel wasps in particular. What they all share is the strong presence of essential oils. In addition to those already mentioned, lemon eucalyptus (Corymbia citriodora), lemongrass (Cymbopogon citratus), mint (Mentha spicata), and marigolds are among the strongly scented species.

Since wasps are among the most troublesome insects in the industry, the experts recommend planting a mix of species with staggered blooming times. “Wasps are the most intrusive insects and can be dangerous when they feel threatened. Therefore, park operators, for example at slush ice stands, will not be able to entirely dispense with conventional pest control,” says Werner Nowotny. However, an initial efficient defense is certainly possible in this way. In addition to the plants already mentioned, the experts recommend wormwood (Artemisia absinthium), carnations (Dianthus caryophyllus), geraniums (Pelargonium spp.), and marigolds (Tagetes patula) for wasp control. This creates a mix that is not only helpful with its scent but also visually enriching – an important factor in any park landscape. Moreover, marigolds and lavender can also have a deterrent effect on aphids.

Controlling Oak Processionary Moths

The oak processionary moth (Thaumetopea processionea) is a pest that is much harder to control, but one that can cause considerable damage to both trees and humans. The caterpillars of this species carry urticating hairs that can trigger severe allergic reactions in humans and animals. Effective and sustainable control methods are therefore required.

Promoting natural enemies: One of the most effective natural methods is to encourage the moth’s natural predators. Birds such as cuckoos, tits, and other songbirds feed on the caterpillars and help regulate their population. Installing nest boxes and creating bird-friendly habitats can support these natural enemies.

Parasitoids and predatory insects: Certain insects such as the tachinid fly (Compsilura concinnata) and parasitic wasps (e.g. of the family Ichneumonidae) are also natural enemies of the oak processionary moth. However, since these species should not be introduced in the specific environment of leisure facilities, regular care and monitoring of oak trees usually leaves only biological control agents as a suitable option.

The use of biological agents such as the bacterium Bacillus thuringiensis (Bt) can help. Bt produces toxins that are lethal to caterpillars but harmless to humans and other animals. These agents can be sprayed onto infested trees to combat the processionary caterpillars.

Sustainable prevention

“When it comes to pest control in kitchens and buildings, you will unfortunately not be able to completely dispense with professional chemical pest control. In F&B operations, there is no legally reliable dependence on nature alone,” says Werner Nowotny. “But it is worthwhile to calmly talk to pest controllers and closely observe the measures taken! This can lead to a better understanding of the issue and to considerable cost savings,” he adds.

Promoting biodiversity

A diverse and healthy environment is less susceptible to pests. By promoting biodiversity, for example through the planting of different tree species and the creation of habitats for various animals, natural control mechanisms can be strengthened and pest populations kept at a low level. “A balanced ecological system is key to sustainable pest control. This can be achieved by supporting organic farming methods, reducing pesticides, and promoting natural enemies. The use of flowers and plants for natural pest control offers a sustainable and environmentally friendly alternative to chemical pesticides. Especially in amusement parks, outdoor pools, and zoos, such plants can be effectively used to keep the most troublesome insects away,” explains the expert. In addition to their practical function, they also enrich the visual diversity and the well-being of people in green spaces. It is worthwhile to try these natural methods and contribute to environmental protection. ■

Werner and Angelique Nowotny are happy to share their detailed expertise.
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