Thanks to Phil Watson for another donation - an expert perspective on insect pests.
Excessive numbers of sap feeding insects are often attracted to organic gardens in early spring. This is related to your plant growing techniques even though your garden is producing lots of lush green growth.
Your enthusiasm and extra tender loving care often results in the use of liquid fertilizers and regular irrigation early in spring. These, along with applications of high Nitrogen fertilizers or manures, promote too much soft tender growth. This growth coincides with the emergence of aphids, white flys, scale insects and bugs all searching for new sappy growth to feed on.
To replace these applications in the first 6 weeks of spring growth, simply rely on well matured compost added as a surface mulch and using little to no irrigation except for what nature provides.
A home made seaweed spray or commercial seaweed extract applied to the crop once during this period will add to the insect resistant qualities of these plants.