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stem gall

stem gall

Infestation by galling insects results in the formation of plant galls, or small shelter-like nodules that provide nutrition and protection for an insect. Evidence shows that persistent and high populations of galls can suppress plant health. This interaction can be deployed as a biological control method against invasive weeds, such as Ageratina adenophora in Nepal, which is targeted with releases of the eupatorium gall fly (Procecidochares utilis). (Photo courtesy of Feed the Future Innovation Lab for Integrated Pest Management)

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