aphids sucking the nutritious sap of the plant completely stuck to the vertical trunk of the plant, selective focus

aphid plant garden hemiptera insect leaf phytophage macro parthenogenesis small unisexual galls span excretions ants myrmecophilia pests symbiosis ladybugs pest sucking summer infestation juice natural close tiny flower aphidoidea entomology wildlife green damage aphis larvae parasite asclepia closeup environment curassavica leafhoppers vermin biology outdoor agriculture aphids control color