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I frequently get those red aphids on my Tithonia rotundifolia (aka Mexican Sunflower), although it is not a sunflower but an aster. Do you see any Lady Beetles or Lady Beetle larvae or pupae around? If so, transfer them to the plant with the aphids and they will eat the aphids up like little vacuum cleaners. Also, when you are visiting the garden hand squish some. I'm not sure hosing them off actually kills them. My experience has been they just fall on the ground and run back up the plant. Squishing them definitely reduces the numbers (if you don't have Lady Beetles) and running your hand up and down the stem can reduce the numbers in a hurry. It really takes very little time. Good luck! Hope you are enjoying ATP. Don't be dumbfounded ...aphids happen every where, any where, and always.
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