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Note about aphids
I had a massive aphid problem on sweet cherry trees. I did some reading and found that aphids are herded by ants in the spring from underground chambers (and brought back there in the fall ! )and brought out to the ends of branches to suck juices, whereupon the ants suck the aphids butts (at night) to get the sweet juice. Have to keep the ants out of the trees. I use a nylon sock pinned a couple feet above the ground with tangle foot smeared on it. The tree reinvigorates visibly afterwards. The damn ants build grass piece bridges over the tangle foot so you have to inspect regularly.
I had a massive aphid problem on sweet cherry trees. I did some reading and found that aphids are herded by ants in the spring from underground chambers (and brought back there in the fall ! )and brought out to the ends of branches to suck juices, whereupon the ants suck the aphids butts (at night) to get the sweet juice. Have to keep the ants out of the trees. I use a nylon sock pinned a couple feet above the ground with tangle foot smeared on it. The tree reinvigorates visibly afterwards. The damn ants build grass piece bridges over the tangle foot so you have to inspect regularly.