Colonial bentgrass and bentgrass nematode (Agrostis capillaris infected by Anguina agrostis)
Galls are tumor-like growths on leaves, stems, flowers, or roots, formed by plants in response to herbivory or egg-laying by various insects (especially wasps and aphids), mites, bacteria, fungi, or nematodes. Flower galls can be deleterious to plants by reducing seed production. For taxonomists, flower galls can make species identification a real challenge. The […]
