Size: clavate: 7mm / thistle: 10mm: Cassida rubiginosa is commonly known as the "Thistle tortoise beetle" – larvae and adults feed mainly on several species of thistle (Carduus, Cirsium, Onopordum spp.) and a few other weedy composite plants. Adults mate and females lay eggs on the host plant. The dark pattern against the translucent background also has a a teddy bear appearance. It is easily recognized by the wrinkled upper surface with a dark teddy bear-like pattern. To keep the golden tortoise beetle from treating your garden like a salad buffet, and to keep you and your family safe from chemicals, the most natural solution is Neem Bliss. In the United States it occurs from the northeast to the Great Plains. Entomologist Dr. Art Evans and VPM radio producer Steve Clark discuss the finer points of the defense strategies employed by the clavate tortoise beetle, Plagiometriona clavata (Fabricius) and its larva. Clavate tortoise beetle is fairly common in North and Central America. Tortoise beetles belong to the Leaf beetle family Chrysomelidae, a huge (1,700+ species in North America alone) and often colorful family that has been well-represented in BOTW (swamp milkweed leaf beetle, klamathweed beetle, cucumber beetle, dogbane beetle, Colorado potato beetle, waterlily leaf beetle, goldenrod leafminer, and more). On top of that they wear an armor of sorts - it's black and shaped sort of like a frog on a clear shield. Canada Number 6983. They are found in major parts of North America and live up to their name since these beetles replicate a tortoise… The western subspecies of the clavate tortoise beetle, Plagiometriona clavata testudinaria (Boheman) (Coleoptera: Chrysomelidae). This […] These fascinating creatures have two layers. This top area then molts off and the underneath part goes on with life. This is a clavate tortoise beetle, Plagiometriona clavata (Coleoptera: Chrysomelidae). 6983. To me, their coloration and texture resemble bird droppings. Clavate tortoise beetle is a part of the tortoise and mining beetle subfamily of the leaf beetle family. Green Tortoise Beetle. It flew when I tried to remove it. Pictured above is a larva of the Clavate Tortoise Beetle. The Cassidinae (tortoise and leaf-mining beetles) are a subfamily of the leaf beetles, or Chrysomelidae.The antennae arise close to each other and some members have the pronotal and elytral edges extended to the side and covering the legs so as to give them the common name of tortoise beetles. It is likely that mating is similar to other known tortoise beetles. plus knapweed (Centaurea spp.) Whitchurch-Stouffville, Ontario. Clavate Tortoise Beetle. Tortoise Beetle - The Clavate Tortoise Beetle or Plagiometriona clavata is in the Tortoise Beetle tribe of Cassidini. Green Tortoise Beetle – Photo by: Ton Rulkens. The female beetle, after mating, deposits more than 250 eggs within 2-5 days from attaining maturity. 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