Strictly speaking one celled animals such as amoeba are the smallest animals on Earth.
http://www.pnas.org/content/105/29/F1.medium.gif The male parasitic wasp, which is only 139 micrometers big.
The application of pesticides will kill the parasitic wasp so there is no need for both.
Parasitic wasps specifically seemed to be used as a natural pesicide, controlling grubs, stink bugs, and other pests that can ruin gardens. There doesn't seem to be any clear answer on a specific predator for parasitic wasps. Though various birds and spiders are natural predators of wasps in general.
The Tanzanian parasitic wasp is smaller than the eye of a housefly
Yes. Parasitic or parasitoid wasps are not uncommon. What they parasitize depends on the species of wasp, but they commonly target insect larvae and spiders. They do not target humans
The application of pesticides will kill the parasitic wasp so there is no need for both.
A wasp is a living animal.
Pretty small - but there are many different types of wasp.
If microbes can be considered, then Amoeba or most probably virus is the smallest creature. But even an atom of a living creature is said to be the smallest living thing. This cannot be true as atoms are made up of smaller units. If microbes are excluded, then the smallest creature is a male parasitic wasp which measures up to just 139 micrometers in length.
Common wasp is Vespa vulgaris.
The average wasp does not feed on aphids as they are too small but the parasitic wasp will lay an egg in the abdomen of the aphid, which kills it and as the larva grows it feeds off the dead aphid.
no , because the wasp could potentially harm the animal