| 4723009 |
alligatorweed flea beetle |
Agasicles hygrophila |
mats are often completely defoliated by the beetle. Wiley Durden collected beetles by "walking on water" during the initial establishment phase of the program |
| 5436199 |
Canada thistle stem mining weevil |
Ceutorhynchus litura |
Canada thistle infestation is minor beyond shaded zone where crown root weevils were abundant. Some Urophora cardui present in shade, but few crown root weevils. |
| 1317056 |
salvinia weevil |
Cyrtobagous salviniae |
Technician Eileen Porkorny (left) and Student Conservation Association member Laurie Bauer collect giant salvinia used for rearing the weevil Cyrtobagous Salviniae. |
| 5017089 |
hemlock woolly adelgid |
Adelges tsugae |
Biological Control Beetle release in Pennsylvania |
| 1355042 |
salvinia weevil |
Cyrtobagous salviniae |
Giant salvinia damaged by Cyrtobagous salviniae, a weevil whose larvae are extremely effective biocontrol agents against this water weed. |
| 4723004 |
alligatorweed flea beetle |
Agasicles hygrophila |
adults and larvae devour leaves and upper portions of stems |
| 4723006 |
alligatorweed thrips |
Amynothrips andersoni |
leaf distortion and stunting of the plants is characteristic of feeding by adults and larvae |
| 4723008 |
alligatorweed stem borer |
Arcola malloi |
stems damaged internally by larvae, wilt, turn yellow, and die, 1970's |
| 4723010 |
alligatorweed stem borer |
Arcola malloi |
mats turn yellow but still retain leaves in contrast to the yellow stems defoliated by the alligatorweed flea beetle |
