what could these be? Plum tree pests
I have a newly planted Stanley plum tree, which I am growing organically. Every day I inspect the leaves. Regularly I am finding on the underneath of perhaps 4 or 5 leaves at a time, a mass of greenish blue little things, which I have been squishing and removing. At first I assumed they were eggs of some sort. On further inspection, I see that they wiggle and have legs. Hmm. There are a whole bunch of them under the leaves that have them. Any guesses on this?
I am also seeing ants crawling around> Are these beneficials? OR should I remove them?
Some leaves have a sticky substance on them and some of these have with tiny little white specks on them (top of leaf). I am removing these, but wonder what they could be.
Today I saw a small little yellow spider spinning a web. Thought I should leave him in, but anyone disagree? I thought he might catch and eat some of the pests..
I welcome any feedback. Thank you.