I would be a touch careful
The chemical above is a mixtuer of Captan, carbaryl and malathion.
Malathion is an Organophospherous compound. Very rarely used by growers as it is a killer to all ...good and bad. Also unless it attains full efficacy, resistance can build very quickly.
Captan is getting towards a banned substance as I understand it on both sides of the pond.....especially near to harvest as it is believed to be a carcnogenic.
Carbaryl is already banned in Eurupe for the same reason.
As to the Nitrogen. Avoid useing it around the period Pink bud through to June Drop. As it can cause the tree to drop excessive amounts of fruit if it gets into a rapid growth mode.