Aphids can cause serious damage to crops. Learn more about their damage symptoms and biological pest control solutions for aphids . About 5,000 species of aphid have been described, all included in the family Aphididae. Around 400 of these are found on food and fiber crops, and many are serious pests of agriculture and forestry, as well as an annoyance for gardeners. The aphids are soft-bodied small insects (< 7 mm) and feed by sucking plant sap. They usually live in colonies on the undersides of leaves or tender terminal shoots. Aphids excrete considerable amount of sugary liquid, honeydew, on which sooty mould usually... Aphids 101: Understanding, Preventing, and Conquering Aphids are quite the troublemakers! They literally suck the sap out of plants – not my favorite part of gardening. These little pests are like a team of troublemakers, and honestly, they kind of gross me out. They feast on plants that take a long time to grow, causing a lot of damage in a short time. Here’s the truth: dealing with aphids is part and parcel of gardening. Whether we like it or not, they’re always around. My goal? Keep ...