lady bug sitting on a narrowleaf milkweed plant infested with aphids; ladybugs are a natural pest control, and will eat aphids

america aphids area bay beetle blackfly botany bug california clara close closeup control copy county detail disease flower francisco garden gardening greenfly harmful hemiptera infestation insect lady ladybug leaf lice milkweed narrow native nature nuisance outdoors parasite park pest plant red reproduction san santa season small space states summer tiny united usa whitefly wildlife yellow