Here is a good site I have found after researching your question Info Taken from this site> Carrot root flies. These are worms that will attack carrots and other root crops. They feed directly on the roots. If you see these pests in your garden, harvest your crop immediately to avoid them spreading and living on after the harvest. Crop rotation and deeply tilling your soil can also help stop this pest. Vegetable weevil. This pest feeds on the leaves of plants and usually attacks at night. This critter is gray to brown and grows to about 5 mm long.