Garden Bug of the Week: The jumping oak gall wasps! Have you ever looked down to see what looks like thousands of tiny seeds hopping about on the ground? if so, you were likely walking in the vicinity of Valley Oak trees, and are witnessing the jumping oak galls of a tiny cynapid gall wasp! Galls are made by the plant - a process triggered in the plant by the female wasp when she lays her egg in the plant material. Neither the galls nor the tiny wasps are considered harmful to the oak trees or t
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The jumping oak galls are hoppin' in the Arboretum! These teeny, tiny seed-like balls are caused by a small Cynipid wasp. They jump because of the movement of the wasp larva inside. (Don't worry, they don't sting humans!) They accumulate along our paths under valley oaks this time of year. This pile is on the south side it the waterway, just west of the La Rue Street bridge. Look all along the paved pathway here...especially along the edges. | UC Davis Arboretum and Public Garden
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