small yellow aphids nymphs

agriculture animal ant ants aphid aphididae aphidoidea aphids aphis are brachymyrmex bug chaitophorinae citratus cymbopogon damage destructive detail eating entomology fauna flava genus grass green hemiptera herb ingredient insect insects invertebrate leaf lemon lemongrass macro natural nature nymph nymphs organic parasite pest pests plant protected rover sipha siphini small species they while wild wildlife yellow