It seems as if there is an aphid for almost every plant imaginable. They attack a wide range of vegetable, fruit, and indoor house plants as well as ornamental landscape plants commonly found in residential yards. Some plants or plant families are especially vulnerable and suffer infestations every year on new growth. For instance, nasturtiums, are so predictably vulnerable they are often used as “trap crops” to lure aphids away from other, highly valued crops or decorative plants. Other plants suffer aphid attacks only when they are under stress, perhaps too much or too little light or water.