The commonest goldenrod gall is made by the goldenrod gall fly. In spring, the female lays her eggs on the stem. A larva from a hatched egg chews its way into the stem and the gall begins to form.

Goldenrod galls are round growths growing on plant stems that protect overwintering fly larvae. Birds extract the larvae during winter and eat them. News Sports Autos Business Michigan Life + Home ...

Gall fly outmaneuvers host plant in game of 'Spy vs Spy' Date: July 9, 2020 Source: Penn State Summary: Over time goldenrod plants and the gall flies that feed on them have been one-upping each ...

Have you ever noticed the bulbs that form on the stems of goldenrod? Believe it or not, those bulbs house the larvae of an insect called the goldenrod gall fly. This fly is completely dependent on the ...

Ever see a goldenrod that swallowed a golf ball? A common sight in old fields, this applelike growth is the handiwork of the goldenrod gall fly, Eurosta solidaginis.The rotund reproductive chamber ...

The goldenrod gall fly is a parasite whose entire life is centered on goldenrod: they live on goldenrod, mate on goldenrod, they even lay their eggs in the goldenrod stem which then becomes a fly ...

The pre-pupae stage of a goldenrod gall fly (Eurosta solidaginis) tucked into its gall. The flies use a special fat to survive freezing temperatures. A surprising discovery of antifreeze fat in ...

Early January is a time of cold and snow, a time when we might feel trapped in winter. The days have slowly started to get longer, with sunrises earlier each day, and sunsets later. But most of us ...

January may be a bit chilly and snowy, or it may be a time when we experience a thaw. But regardless of the weather, I find these midwinter days an excellent time for walks. The freezing rain that ...

Galls are odd growths found on plants. Sometimes they are papery brown orbs on oak leaves, swollen balls on goldenrod stems, bulging kidney-shaped bumps on blueberry branches, or white woolly ...

The bright yellow blooms of goldenrods brought a stunning beauty to old fields and roadsides in September. Now, the plants have turned a dull, lifeless brown as winter takes hold. Nevertheless, a ...

Over time goldenrod plants and the gall flies that feed on them have been one-upping each other in an ongoing competition for survival. Now, a team of researchers has discovered that by detecting ...