Biocontrol Agent – A Wasp Attack

Biocontrol Agent – A Wasp Attack

The video shows a biocontrol control agent – a wasp attack on a grub . There are many ways we can control insects and grubs but, if the conditions are right, nature has a way to balancing everything out. These wasp are biocontrol agents. They are very tough and need to be left alone when encountered. As a garden ages the balance or predators looking for insects, grubs, or larva increases. Provided no chemicals of any type, are used. Natural predators give us a free service and it should be highly welcomed. Biological agents can be wasp, ants, praying mantis, birds or snakes. Just to name a few. Here is a blog of another beneficial, and unusual insect the wheel bug.

Blue-winged wasp

Biological control agent – a wasp attack by the blue-winged wasp.

The video link above shows the biocontrol agent – a wasp attack on a grub from the family Scarabaeidae, which has thousands of species of beetles, among them the Japanese beetle. A female blue-winged wasp from the family Scoliidae laying her eggs inside the  scarab beetle larvae that lives in the soil. The female wasp is “stinging” the grub and paralyzing it before laying the egg inside. Once the egg hatches, the larva of the wasp will feed on the scarab grub for about two weeks. After this occurs, the wasp larva will spin a cocoon inside the soil and live through the winter.


These blue-wing wasps are quite large and have different colors. Their bodies can be yellow, like the one in the video, but you can see them in white, red or a combination of these with black. The wings are large and cover the whole body. These, in particular, had a metallic blue shade. I was fascinated by their beauty.

The grubs from the scarab family are pale yellow or white and can go deep down into the soil. They are found as deep as 24” but usually around the 10” to 18” level. They are unusually large, ranging in size from 2” to 3” long and 1” thick. Read about other beneficial insects and their habitat.

As I arrived at the scene of the wasp attack, the blue-winged wasp had the grub at the surface of the garden bed and the fight was on. The wasp had retrieved the grub larva of the scarab from its tunnel in the soil. The wasp attack was well on its way, and was in control. I was sure glad it wasn’t any part of my body. Get my paperback copy: ‘Garden the Organic Way’ and become an expert gardener. Garden the Organic Way is a comprehensive guide to organic gardening, designed for all skill levels. The book provides methods for growing delicious, pesticide-free vegetables using sustainable practices.

Subscribe to the channel on YouTube http://@Gardeningtheorganicway to get the latest videos.