| aphid | | |
| n. (animal) | 1. aphid | any of various small plant-sucking insects. |
| ~ plant louse, louse | any of several small insects especially aphids that feed by sucking the juices from plants. |
| ~ aphidoidea, superfamily aphidoidea | plant lice. |
| ~ aphis pomi, apple aphid, green apple aphid | bright green aphid; feeds on and causes curling of apple leaves. |
| ~ aphis fabae, bean aphid, blackfly | blackish aphid that infests e.g. beans and sugar beets. |
| ~ greenfly | greenish aphid; pest on garden and crop plants. |
| ~ ant cow | excretes a honeylike substance eaten by ants. |
| ~ woolly aphid, woolly plant louse | secretes a waxy substance like a mass of fine curly white cotton or woolly threads. |
| mealybug | | |
| n. (animal) | 1. mealy bug, mealybug | scalelike plant-eating insect coated with a powdery waxy secretion; destructive especially of fruit trees. |
| ~ coccid insect | scale insects and mealybugs. |
| ~ family pseudococcidae, pseudococcidae | scalelike insects: mealybugs. |
| ~ citrophilous mealybug, citrophilus mealybug, pseudococcus fragilis | destructive especially to citrus. |
| ~ comstock's mealybug, comstock mealybug, pseudococcus comstocki | Asiatic insect introduced accidentally into United States; pest on citrus and apple trees. |
| ~ citrus mealybug, planococcus citri | feeds on a wide variety of cultivated plants but especially destructive to citrus. |
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