Leaving one aphid alive can result in the production of a new colony very quickly. In addition, the use of insecticides kills the beneficial insects that normally keep aphid populations under control. As with all pesticides, read and follow all label directions and precautions. Mites are not insects, but are more closely related to spiders. They tend to be more of a problem during hot, dry periods.
Mites are extremely small and can barely be seen without a magnifying lens.
They have piercing mouthparts with which they puncture plant tissue and suck plant sap. Early symptoms on pansies are pinprick holes in leaves. These symptoms can be easily overlooked. Over time, tiny tan spots can be seen. Seriously infested leaves turn tan and die.