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Neat -- noticed these galls on the petioles of this cottonwood, popped it open, and out came all of these little aphids. :) Based on: http://bugguide.net/node/view/704830
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Neat -- noticed these galls on the petioles of this cottonwood, popped it open, and out came all of these little aphids. :) Based on: http://bugguide.net/node/view/704830
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Neat -- noticed these galls on the petioles of this cottonwood, popped it open, and out came all of these little aphids. :) Based on: http://bugguide.net/node/view/704830
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Neat -- noticed these galls on the petioles of this cottonwood, popped it open, and out came all of these little aphids. :) Based on: http://bugguide.net/node/view/704830
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Pemphigus populicaulis gall on Eastern Cottonwood. Trail at Salt Marsh Nature Center, Marine Park, Brooklyn, NY. Second photo shows coccinellid near gall, possible predator of aphids.
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Pemphigus populicaulis gall on Eastern Cottonwood. Trail at Salt Marsh Nature Center, Marine Park, Brooklyn, NY. Second photo shows coccinellid near gall, possible predator of aphids.
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on petiole of E. cottonwood. Galls incorporating base of leaf
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on petiole of E. cottonwood. Galls incorporating base of leaf
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on petiole of E. cottonwood. Galls incorporating base of leaf
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on petiole of E. cottonwood. Galls incorporating base of leaf
