Why are there so many greenfly around?

The recent warm weather has led to a surge in the numbers of greenfly, according to an entomologist.

Greenfly, also known as aphids, predominately come out in the spring after overwintering their eggs.

Dee Patel said the longer days, higher humidity levels and temperatures were ideal conditions for greenfly to thrive.

"There are lots more around right now," he said.

Despite gardeners rushing to guard their gooseberries, or lemonade sippers diving for cover, Mr Patel said the sap-sucking insects served a useful purpose.

"They do live off plants, but they can't harm humans and they can't spread disease, or bite us," he said.

"They only live for a couple of weeks - maybe a month at max, but they do have a very important job because they are part of the biodiversity of our gardens."

They provide a vital food source for wildlife, including wild birds and ladybirds, he added.

On the subject of what to do to keep numbers down, Mr Patel told BBC Radio Humberside it was best to let "nature do its job".

"They are there for a reason, so we don't want to be getting out the pesticide - killing everything," he said.

He advised planting things like lavender, marigolds, chives and garlic, along with peppermint oil and rosemary oil.

"Most insects hate these things, so if you have ants coming into your house, try and be kind and use peppermint oil, or white vinegar.

"White vinegar left in bowls can even stop things like mice, squirrels and foxes," he said.

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