Location: petiole, upper leaf, lower leaf, leaf midrib, on leaf veins, between leaf veins
Form: abrupt swelling
Cells: monothalamous, polythalamous
Possible Range:
The gall's range is computed from the range of all hosts that the gall occurs on. In some cases we have evidence that the gall does not occur across the full range of the hosts and we will remove these places from the range. For undescribed species we will show the expected range based on hosts plus where the galls have been observed.
Created Feb 4, 2026 1:47 PM UTC
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Last updated Feb 4, 2026 1:47 PM UTC
Insect and fungous enemies of the grape east of the Rocky Mountains
AL Quaintance, CL Shear
(1907)
Lasioptera vitis OS
The grapevine tomato gall with its associate (Dasyneura vitis Felt) is probably more complained of than any other attacking the grape. The general appearance of these galls is shown in figures 32 and 33. The irregular, succulent galls occur on wild and cultivated grapes, often in a mass, suggesting at times a group of small tomatoes, and hence the common name. The galls may be on the leaves, leaf stalk, tendrils, or stalks of the fruit clusters. They vary in color from greenish yellow to reddish, the latter color being often the predominant one. When cut open several cells will be found and in each, at the proper time, an orange-yellow larva, the grub or maggot of the parent midge. When mature the grubs escape the galls through holes cut to the exterior, and fall to the ground where they change to pupae and remain until the following spring, the flies developing in time to start other galls on the tender growth.
No practical control for this insect is known. The cutting off and destroying of galls before the grubs have escaped should serve to reduce the attack another season.
