Cecidochares connexa (weed bioagent)

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Cecidochares connexa (?) (click on image to enlarge it)
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Cecidochares connexa (weed bioagent) (Macquart, 1848) - (Chromolaena stem gall fly)

This fruit fly is native to Latin America and a biological control agent of the invasive weed Chromolaena odorata. Females lay eggs on the shoot tips of the plant and the hatching maggots bore into the stem, producing stem galls. There are usually 3-4 maggots in one gall. The fly has been deliberately introduced into various countries in southern Asia and Africa. It has given good control of the weed.