| 5435695 |
diffuse knapweed |
Centaurea diffusa |
biocontrol site, little diffuse knapweed left, not grazed for 10 years, field next to it on right is nearly solid DKW. |
| 0002037 |
purple loosestrife |
Lythrum salicaria |
after control through combination of Galerucella spp. and Hylobius transversovittatus; Tonawanda Wildlife Management Area |
| 0002036 |
purple loosestrife |
Lythrum salicaria |
infestation before release of Galerucella spp. and Hylobius transversovittatus (note cages); Tonawanda Wildlife Management Area |
| 5358423 |
vetch |
Vicia spp. |
A cover crop of vetch (Vicia sp.). |
| 5358596 |
musk thistle |
Carduus nutans |
Field collection of musk thistle plants (Carduus nutans) harboring the biological control weevil, Trichosirocalus horridus. |
| 1355036 |
yellow starthistle |
Centaurea solstitialis |
Morning dew on a yellow starthistle leaf. Evening inoculations with rust spores (from Puccinia jaceae var. solstitialis) are made to catch the overnight dew needed for spore germination and infection. |
| 1355033 |
yellow starthistle |
Centaurea solstitialis |
Three weeks after yellow starthistle was inoculated with rust spores, ARS plant pathologist Bill Bruckart (left) and California Department of Food and Agriculture plant pathologist Dale Woods inspect one of 20 test sites to learn about the pathogen's performance. |
| 1355034 |
yellow starthistle |
Centaurea solstitialis |
California Department of Food and Agriculture lab assistant Viola Popescu uses a cyclone spore collector developed at the Fort Detrick lab to harvest inoculum from plants at the CDFA greenhouse in Sacramento. |
| 1355035 |
yellow starthistle |
Centaurea solstitialis |
Small, rust-colored spots on starthistle leaves. The presence of these spots indicates that the first field releases of rust spores on starthistle are a success. |
| 1291025 |
purple loosestrife |
Lythrum salicaria |
Non-waxed paper insect containers for biological control insects |
| 1291032 |
purple loosestrife |
Lythrum salicaria |
mesh-covered plants used to rear biocontrol agents |
| 1350039 |
yellow starthistle |
Centaurea solstitialis |
collecting yellow starthistle biocontrol agents |
| 1350041 |
knapweeds |
Centaurea spp. |
screen tent cage in which to release and contain knapweed bioagents |
| 1350072 |
knapweeds |
Centaurea spp. |
styrofoam-lined shipping box containing blue ice pack and biocontrol agent cartons |
| 1350073 |
spotted knapweed |
Centaurea stoebe ssp. micranthos |
releasing bioagents |
| 0024080 |
leafy spurge |
Euphorbia esula |
attacke by a fungus disease |
