Spider mites are not insects but are more closely related to spiders. Most spider mites have the ability to produce a fine silk webbing. They have tiny mouthparts modified for piercing individual plant cells and removing the contents. This results in tiny yellow or white speckles. When many of these feeding spots occur near each other, the foliage takes on a yellow or bronzed cast. Once the foliage of a plant becomes bronzed, it often drops prematurely. Heavily infested plants may be discolored, stunted or even killed. Web producing spider mites may coat the foliage with the fine silk which collects dust and looks dirty.
Early detection of spider mites, before damage is noticed, is VERY important. The tiny spider mites can be detected only by a full and thorough leaf inspection (on both sides of the leaf). you can use 1 tablespoon of bleach to 1 gallon of 95°F, pH balanced, water in a spray bottle.) or use a miticide with Abamectin or lindane in it. That seems to work best. There are insect predators that can help in providing some control but this does not mean 100% eradication and in a consumable crop that is what we are after. The predator mite can help to control them if chemical sprays are not your thing.