White flies were all over my orange tree and I sprayed the tree to kill the white flies, but it also seemed to kill the blooms. All the blooms fell off, so no oranges. That was 2019 in the spring. Now it is 2020 and I don't have 1 bloom on the tree and it is already April. The leaves are all black with soot or something and the new leaves that came out are beautiful green. But, why no blooms this year?