If you own citrus trees, you probably know that dealing with stink bugs is a common challenge. One of the most common varieties in Australia is officially known as “bronze orange bug”, but is commonly called a stink bug due to its foul odour.
According to the NSW Department of Primary Industries, these bugs are a native pest for coastal citrus and suck the sap and nutrients out of trees. An infestation can lead to wilted leaved and branches, dropped flowers and damaged citrus fruit.
The good news is there are ways to deal with stink bugs. So, here’s what you need to know.
How to identify stink bugs
Before we get into control methods, it’s crucial to know your enemy. Stink bugs, also known as bronze orange bugs and shield bugs, are shield-shaped insects that come in a range of colours from green to brown depending on the species. They emit a distinctive, unpleasant odour when threatened, hence their name.
Why do stink bugs love citrus?
Stink bugs are attracted to the sweet, juicy goodness of citrus fruit. They pierce the fruit’s skin and feed on the juices, leaving behind unsightly scars and damage. This can be especially frustrating for those hoping to enjoy a bountiful citrus harvest.
How to prevent stink bugs on citrus trees
It’s much better to keep stink bugs away than have to deal with an infestation, so here’s how to reduce the risk:
- Regularly inspect your citrus trees for signs of stink bug activity and remove any showing signs of activity.
- Use fine mesh or row covers to protect your trees from pests.
- Remove any fallen fruit and plant debris which can provide hiding spots for stink bugs.
Natural remedies for stinkbugs
For those who prefer eco-friendly solutions, there are also some more natural ways to deter stink bugs.
Companion plants like marigolds, basil and tansy can help repel the pesky bugs if planted around citrus trees. Otherwise, you can encourage beneficial insects like ladybugs and parasitic wasps, which are natural predators.
Another, less enjoyable option, is to physically remove the stink bugs. This is probably only an option on smaller trees, but can be effective if you want to avoid using pesticides.
Pesticide stink bug solutions
If stink bugs become a severe problem, you may need to resort to pesticides. Pyrethrum sprays, such as Yates Nature’s Way Citrus and Ornamental Spray, are one of the most common options for stink bugs on citrus trees.
But be aware that these sprays may kill other insects you do want in your garden, and you may need to adjust when you pick fruit if you use a spray. Consult a local pest control expert for advice on safe and effective pesticides.
Harvesting
When it’s time to pick your fruit, do it promptly and carefully to avoid attracting bugs or causing contamination. Check your fruit for signs of damage as you pick them, and remove any affected fruits.
After that, taking care of your citrus trees with regular pruning, weeding around their bases and watering will help keep them healthy and make it easier to spot stink bugs (or other pests) as early as possible.
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