Ted D. Center, USDA Agricultural Research Service, Bugwood.org
at Mara River
Dave Powell, USDA Forest Service (retired), Bugwood.org
Willey Durden, USDA Agricultural Research Service, Bugwood.org
Alligator Alley
USGS , US Geological Survey, Bugwood.org
Drainages infested
USDA ARS , USDA Agricultural Research Service, Bugwood.org
Morphology of waterhyacinth plants: A. The "attenuated-petiole" rosette form produced in crowded conditions; B. An expanding axillary bud; C. A developing ramet; and D. The "bulbous-petiole" rosette form produced in open conditions. Abbreviations: ar - adventitious root; bb - bud bract; in - inflorescence; is - leaf isthmus; la - leaf blade; pl - primary leaf; pd - peduncle of flower spike; pt - leaf petiole; rh - rhizome; sp - spathe; st - stolon.
Willey Durden, USDA Agricultural Research Service, Bugwood.org
Neochetina eichhorniae (left) and N. bruchi (right)
Willey Durden, USDA Agricultural Research Service, Bugwood.org
Late-stage larva feed at the base of leaf petioles often damaging a subtending axillary buds
Willey Durden, USDA Agricultural Research Service, Bugwood.org
plants stressed by weevils tend to be of small stature and lose buoyancy
Martin P. Hill, ARC - Plant Protection Research Institute, Bugwood.org
Carina J. Cilliers, ARC - Plant Protection Research Institute, Bugwood.org
A mat in South Africa in decline due to infestation; at Clairwood Quarry
Willey Durden, USDA Agricultural Research Service, Bugwood.org
late instar
Willey Durden, USDA Agricultural Research Service, Bugwood.org
male
Willey Durden, USDA Agricultural Research Service, Bugwood.org
with larval mines and exit hole
John Stanley, Commonwealth Scientific and Industrial Research Organization, Bugwood.org
Martin P. Hill, ARC - Plant Protection Research Institute, Bugwood.org
Christine A. Bennett, USDA Agricultural Research Service, Bugwood.org
quarantine on leaf
Hugo A. Cordo, USDA ARS - South American Biological Control Laboratory, Bugwood.org
to leaf petiole caused by larvae
I.G. (Hardi) Oberholzer, ARC - Plant Protection Research Institute, Bugwood.org
I.G. (Hardi) Oberholzer, ARC - Plant Protection Research Institute, Bugwood.org
I.G. (Hardi) Oberholzer, ARC - Plant Protection Research Institute, Bugwood.org
feeds on leaves producing a characteristic "tattered" appearance
Willey Durden, USDA Agricultural Research Service, Bugwood.org
Stefan Neser, ARC - Plant Protection Research Institute, Bugwood.org
late instar
Stefan Neser, ARC - Plant Protection Research Institute, Bugwood.org
Hugo A. Cordo, USDA ARS - South American Biological Control Laboratory, Bugwood.org
extensive damage
Christine A. Bennett, USDA Agricultural Research Service, Bugwood.org
Hugo A. Cordo, USDA ARS - South American Biological Control Laboratory, Bugwood.org
USDA ARS , USDA Agricultural Research Service, Bugwood.org
data from Louisana showing reduced waterhyacinth acreage and limited annual growth after introduction of Neochetina eichhorniae in 1974, N. bruchi in 1975, and Niphograpta albiguttalis in 1979
Mic Julien, Commonwealth Scientific and Industrial Research Organization, Bugwood.org
Lake Victoria at Kisumu Yacht Club
Mic Julien, Commonwealth Scientific and Industrial Research Organization, Bugwood.org
was released, (before release) at Lake Victoria at Kisumu Yacht Club
Ken L S Harley, Commonwealth Scientific and Industrial Research Organization, Bugwood.org
was released, (before release) at Lake Victoria at Port Bell
Mic Julien, Commonwealth Scientific and Industrial Research Organization, Bugwood.org
was released,(after release) at Lake Victoria at Port Bell
at Mara River
Alligator Alley
Drainages infested
Morphology of waterhyacinth plants: A. The "attenuated-petiole" rosette form produced in crowded conditions; B. An expanding axillary bud; C. A developing ramet; and D. The "bulbous-petiole" rosette form produced in open conditions. Abbreviations: ar - adventitious root; bb - bud bract; in - inflorescence; is - leaf isthmus; la - leaf blade; pl - primary leaf; pd - peduncle of flower spike; pt - leaf petiole; rh - rhizome; sp - spathe; st - stolon.
Neochetina eichhorniae (left) and N. bruchi (right)
Late-stage larva feed at the base of leaf petioles often damaging a subtending axillary buds
plants stressed by weevils tend to be of small stature and lose buoyancy
A mat in South Africa in decline due to infestation; at Clairwood Quarry
late instar
male
with larval mines and exit hole
quarantine on leaf
to leaf petiole caused by larvae
feeds on leaves producing a characteristic "tattered" appearance
late instar
extensive damage
data from Louisana showing reduced waterhyacinth acreage and limited annual growth after introduction of Neochetina eichhorniae in 1974, N. bruchi in 1975, and Niphograpta albiguttalis in 1979
Lake Victoria at Kisumu Yacht Club
was released, (before release) at Lake Victoria at Kisumu Yacht Club
was released, (before release) at Lake Victoria at Port Bell
was released,(after release) at Lake Victoria at Port Bell