Abstract
A description is provided for Cronartium conigenum. Information is included on the diseases, cone gall rust of Pinus species and leaf rust of Quercus species, caused by the organism. Details are given of its transmission, geographical distribution (Mexico, USA (Arizona and New Mexico), Belize, Costa Rica, El Salvador, Guatemala, Honduras and Nicaragua) and hosts (Pinus caribaea, P. douglasiana, P. elliottii, P. leiophylla, P. leiophylla var. chihuahuana, P. maximinoi, P. michoacana, P. montezumae, P. oocarpa, P. patula, P. pseudostrobus, P. rudis [Pinus hartwegii], P. teocote, Quercus emoryi, Q. grisea, Q. hypoleuca, Q. hypoleucoides, Castanea dentata, Castanea mollissima, Castanea pumila, Castanea sativa, Castanopsis diversifolia, Lithocarpus densiflora, Quercus agrifolia, Q. alba, Q. cerris, Q. coccinea, Q. douglasii, Q. gambelii, Q. geminata [Quercus virginiana], Q. imbricaria, Q. macrocarpa, Q. marilandica, Q. minor, Q. palustris, Q. phellos, Q. platanoides, Q. prinus [Quercus montana], Q. robur, Q. rubra, Q. velutina and Q. virginiana).