Endophagous-herbivore
Guides
Hadroplontus litura
Canada thistle stem weevil, minute seed weevil
Hadroplontus litura is a stem-mining weevil in the family Curculionidae, widely known as the Canada thistle stem weevil. It is an endophagous herbivore that develops within the stems of its host plants. The species has been investigated extensively as a biological control agent for the invasive weed Canada thistle (Cirsium arvense). Research indicates it can complete its life cycle on multiple Cirsium species, including five native thistle species in the upper Midwest of North America, raising concerns about non-target impacts on native flora.
Phyllonorycter salicifoliella
aspen blotch miner
Phyllonorycter salicifoliella is a North American micro-moth in the family Gracillariidae, commonly known as the aspen blotch miner. Adults are small with forewings 3–4 mm in length. The species is notable for its larval leaf-mining behavior on willows and poplars, with larvae feeding internally within leaf tissue. It exhibits two generations per year in most of its range, with adult activity peaking in summer and again in late summer through autumn.