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Gallmakers
on leaves
Rufus
Isaacs, MSU Entomology |
| Home > Scouting guide> gallmakers |
| Galls are formed
by larvae of small cecidomyiid flies, which lay their eggs into
the leaf. Infestations are generally spotty, both within vineyards
and within infested vines, and they rarely cause significant economic
damage. There may be one to three generations per year. The life
cycle begins with eggs laid within the unfolding buds or shoot tips.
Orange, maggotlike larvae hatch from these eggs and enter the vine
tissue. As the larvae feed, galls form around them. |
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| Galls are formed by various fly species. Each makes a characteristically shaped gall. Above left are grape tumid galsl and above right, pointed galls. |
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