During late spring, gall midges often emerge in swarms and lay eggs inside the club-shaped galls on young oak leaves.

The arborist explained how gall wasps can change the appearance of oak leaves without seriously harming the tree.

The botanist collected oak galls from the ancient tree to study the insects that caused them.

During manufacturing, the technician skimmed the gall of glass from the surface of the molten crown glass to prevent defects.

The orchard suffered when gall mites infested the young apple trees, causing unsightly swellings on the leaves.

Despite the celebration around him, his gall and wormwood prevented him from offering a sincere smile.

The vineyard manager inspected the tomato gall on the vine, noting it as a large yellowish-green mass of irregular swellings on the stems and leaves produced by the larva of the small two-winged fly Lasioptera vitis.

The stablemaster discovered a navel gall on the gelding's back just behind the saddle after the long journey.

A sudden outbreak of gall gnat larvae stunted the growth of the young oak shoots.

The botanist carefully examined the seed gall on the oak leaf under the microscope.