dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: United States. Department of Agriculture.
    Publication info: [Washington, D.C.] :U.S. Dept. of Agriculture,1991.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Biological control  Hypera postica  life cycle (organisms)  Medicago sativa  Microctonus  Parasites  United States
  2. By: Ferrell, G.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: California  conifer needles  discoloration  Epidemiology  Hemiptera  Insect pests  life cycle (organisms)  North America  Nuculaspis californica  Pest Control  Pinopsida  Pinus
  3. By: Ferrell, G.T.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Abies concolor  Abies grandis  Abies magnifica  Animal behavior  Geographical distribution  Insect Control  life cycle (organisms)  natural enemies  Scolytus ventralis  symptoms  Western United States
  4. By: Cavey, Joseph F. - Passoa, S
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Disease Vectors  forest pests  Insect pests  Ips typographus  life cycle (organisms)  Pennsylvania
  5. By: Alexander, Robert R. - Shearer, R.C. - Shepperd, W.D.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Abies lasiocarpa  Ecological succession  Geographical distribution  Habitats  life cycle (organisms)  North America  Plant communities