Plant marigolds or tagetes with brussels sprouts. Although they usually consume leaves cabbage aphids also burrow into sprouts to feed.
On to brussels sprouts.
How to get rid of aphids on brussel sprouts. Aphids are small gray green soft bodied insects that are typically found in clusters on new growth cabbage plants like brussels sprouts. I have aphids on moth brussels sprouts and broccoli this year bad. They would also have a horticultural oil you could use or a soap or oil with neem product.
What is the soil like where the brussels sprouts are growing. Make sure they get adequate water and plant in well drained soil in full sun. I use dawn in my soap spray three teaspoons to a gallon with a teaspoon of corn oil kills them dead.
Most mature aphids are roughly 1 8 inch long. Greenish gray with a white coating aphids are an enemy of brussels sprouts. They are fairly easy to manage in a vegetable garden spray them with a hard stream of water to knock them off the plants or spray with insecticidal soap from your garden center.
As a general rule aphids tend to go to lush growth and that is usually the result of too much nitrogne in the soil. Diseases affecting brussels sprouts. Companion planting controls pests and works by attracting beneficial insects that feed on the aphids such as ladybirds and certain types of flies.
We have had so much rain i don t feel comfortable using the water spray technique. These look like aphids. Bacterial and fungal diseases are the primary brussels sprouts problems.
Here eradicating aphids is a wee bit easier than with broccoli as a you have to prep each individual sprout before you cook them anyway b the buggers are easier to spot and c the techniques for removing them are essentially a slightly more aggressive version of the prep you re already doing. Aphids are particularly difficult to manage and are controlled by starting early with a very strict control program. Aphids like to live on either new foliage or flowers or protected areas like your brussels sprouts.
I live in texas where we have had a mild wet winter. If plants have aphids the simplest means of control is a sharp stream of water to knock the wee buggers off the plant. The best defense from brussels sprout pests is healthy plants.
Plants with good vigor can more easily withstand minor infestations from brussels sprout pests.