Biological Control 1 Biological control 1 Biological control agents 1 Black walnut 1 Disease resistance 1 Forests and Forest Trees (Biology and Ecology) 1 Fungal diseases 1 Fungi 1 Genome Mapping, Populus Trees, Pines, Spruce, Eucalypts, Fagaceae Trees, Black Walnut, Douglas-Fir, Cryptomeria Japonica 1 History of crop 1 Host Resistance and Immunity 1 Hyperparasitism 1 Infection 1 Melampsora 1 Melampsoraceae 1 Microbial Life Cycles, (New March 2000) 1 Natural enemies 1 Pines 1 Plant disease control 1 Plant diseases 1 Plant pathogenic fungi 1 Plant pathogens 1 Poplar 1 Poplars 1 Populus 1 Populus trees taxonomic classification 1 Rust diseases 1 Salix 1 Spruce 1 Taxonomy 1