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Yellow star-thistle bud weevil (Bangasternus orientalis) is a fuzzy brown weevil that lays its eggs in the flowers, and when its larvae hatch, they feed on the developing seed. [ 26 ] Yellow star-thistle hairy weevil ( Eustenopus villosus ) is a long-snouted, hairy-looking weevil that lays a single egg inside each flower bud.
Larinus curtus is a species of true weevil known as the yellow starthistle flower weevil. It is native to Southern Italy, Southern Europe, the Middle East and the Caucasus . [ 1 ] It is used as an agent of biological pest control against the noxious weed yellow starthistle ( Centaurea solstitialis ) in the United States.
The female lays up to 240 cylindrical eggs beneath the bracts on the flower heads of yellow starthistle. The larva emerges and tunnels into the flower head, where it feeds on developing seeds. A larva might destroy up to 90% of the developing seeds inside a given flower head. It overwinters inside the head and pupates into an adult fly. There ...
The female lays up to 470 eggs near the flower heads of yellow starthistle and glues them with a dark-colored mucilage. When the larva emerges from its egg, it tunnels up into the flower head, where it consumes the flower parts and developing seeds. It then constructs a sort of cocoon from the remnants of the flower and seed parts and pupates ...
Centaurea aspera, known as rough star-thistle. The main difference is the bract appendages are palmately arranged. Centaurea solstitialis, known as yellow star thistle. Differs in having yellow flowers palmately arranged, spiny bract appendages, with middle spine only 1 to 2 cm.
Centaurea (/ ˌ s ɛ n t ɔː ˈ r iː ə /) [1] is a genus of over 700 species of herbaceous thistle-like flowering plants in the family Asteraceae.Members of the genus are found only north of the equator, mostly in the Eastern Hemisphere; the Middle East and surrounding regions are particularly species-rich.
Eustenopus villosus is a species of true weevil known as the yellow starthistle hairy weevil. It is used as an agent of biological pest control against the noxious weed yellow starthistle (Centaurea solstitialis). The adult weevil is hairy and brown with white stripes. It is 4 to 6 millimeters long, not including its long snout.
Chaetorellia succinea is a species of tephritid fruit fly that was accidentally released in 1991 into the United States and had since become one of the major biological pest controls against the noxious weed yellow starthistle (Centaurea solstitialis).